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34500 vulnerabilities by Linux
CVE-2026-64565 (GCVE-0-2026-64565)
Vulnerability from nvd – Published: 2026-08-04 06:23 – Updated: 2026-08-04 06:23
VLAI
EPSS
VEX
Title
Input: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()
Summary
In the Linux kernel, the following vulnerability has been resolved:
Input: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()
The `ims_pcu_process_data()` processes incoming URB data byte by byte.
However, it fails to check if the `read_pos` index exceeds
IMS_PCU_BUF_SIZE.
If a malicious USB device sends a packet larger than IMS_PCU_BUF_SIZE,
`read_pos` will increment indefinitely. Moreover, since `read_pos` is
located immediately after `read_buf`, the attacker can overwrite
`read_pos` itself to arbitrarily control the index.
This manipulated `read_pos` is subsequently used in
`ims_pcu_handle_response()` to copy data into `cmd_buf`, leading to a
heap buffer overflow.
Specifically, an attacker can overwrite the `cmd_done.wait.head` located
at offset 136 relative to `cmd_buf` in the `ims_pcu_handle_response()`.
Consequently, when the driver calls `complete(&pcu->cmd_done)`, it
triggers a control flow hijack by using the manipulated pointer.
Fix this by adding a bounds check for `read_pos` before writing to
`read_buf`. If the packet is too long, discard it, log a warning,
and reset the parser state.
[dtor: factor out resetting packet state, reset checksum as well]
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
628329d52474323938a03826941e166bc7c8eff4 , < 40bbbf2e91fd60715525bf0405c67876af817edf
(git)
Affected: 628329d52474323938a03826941e166bc7c8eff4 , < ca9f8c09845fb8c51b6d447f6428eecd1b8b0a49 (git) Affected: 628329d52474323938a03826941e166bc7c8eff4 , < d03a740e087de7dcb2a26dc1123377bd3d1d84ca (git) Affected: 628329d52474323938a03826941e166bc7c8eff4 , < 875115b82c295277b81b6dfee7debc725f44e854 (git) |
|
| Linux | Linux |
Affected:
3.10
Unaffected: 0 , < 3.10 (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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CVE-2026-64564 (GCVE-0-2026-64564)
Vulnerability from nvd – Published: 2026-08-04 06:23 – Updated: 2026-08-04 06:23
VLAI
EPSS
VEX
Title
sctp: don't free the ASCONF's own transport in DEL-IP processing
Summary
In the Linux kernel, the following vulnerability has been resolved:
sctp: don't free the ASCONF's own transport in DEL-IP processing
sctp_process_asconf() caches the transport the ASCONF chunk is processed
against in asconf->transport (== chunk->transport, set once in sctp_rcv()).
For an ASCONF located through its Address Parameter by
__sctp_rcv_asconf_lookup(), that cached transport corresponds to the
Address Parameter, which need not be the packet's source address.
sctp_process_asconf_param() rejects a DEL-IP for the packet source address
(ADDIP D8, SCTP_ERROR_DEL_SRC_IP), but nothing protects asconf->transport.
A single ASCONF can therefore carry, in order:
[Address Parameter L] [DEL-IP L] [DEL-IP 0.0.0.0]
where L differs from the source. The DEL-IP for L passes the D8 check and
calls sctp_assoc_rm_peer() on the transport that asconf->transport still
points at, freeing it (RCU-deferred). The following wildcard DEL-IP then
reuses the now-dangling asconf->transport in sctp_assoc_set_primary() and
sctp_assoc_del_nonprimary_peers(): set_primary() dereferences the freed
transport (->ipaddr, ->state) and plants the dangling pointer into
asoc->peer.primary_path / active_path, and del_nonprimary_peers(), keeping
only the pointer that is no longer on the list, removes every real
transport, leaving the association with a transport_count of 0 and
primary_path/active_path pointing at freed memory.
Reject a DEL-IP that targets the transport the ASCONF is being processed
against, mirroring the existing source-address guard, so the wildcard
branch can never reuse a freed transport.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
42e30bf3463cd37d73839376662cb79b4d5c416c , < fedeb4468987bcaff85fe3061de5ae052d414740
(git)
Affected: 42e30bf3463cd37d73839376662cb79b4d5c416c , < 74e8f3e7114f0e26d1b2c4c048044db9fcc27603 (git) Affected: 42e30bf3463cd37d73839376662cb79b4d5c416c , < 85aca407c560aba81b5ce9d3d6cf94c74077d19b (git) Affected: 42e30bf3463cd37d73839376662cb79b4d5c416c , < d136b29bf91dd8e3161281b87de597b7311d9462 (git) Affected: 42e30bf3463cd37d73839376662cb79b4d5c416c , < 9b2854f86f0b56e9027d68e7a3fc909d1a9b566f (git) |
|
| Linux | Linux |
Affected:
2.6.25
Unaffected: 0 , < 2.6.25 (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2-rc5 , ≤ * (original_commit_for_fix) |
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CVE-2026-64563 (GCVE-0-2026-64563)
Vulnerability from nvd – Published: 2026-08-04 06:23 – Updated: 2026-08-04 06:23
VLAI
EPSS
VEX
Title
rhashtable: clear stale iter->p on table restart
Summary
In the Linux kernel, the following vulnerability has been resolved:
rhashtable: clear stale iter->p on table restart
rhashtable_walk_start_check() has two restart paths when resuming a walk.
When iter->walker.tbl is valid, it re-validates iter->p against the table
and sets iter->p = NULL if the object is gone. When iter->walker.tbl is
NULL (table was freed during resize), it resets slot and skip but forgets
to clear iter->p.
rhashtable_walk_next() then dereferences the stale iter->p, reading
freed memory. This is a use-after-free.
Any caller that does multi-fragment rhashtable walks across
walk_stop/walk_start boundaries is affected. Concrete cases include
netlink_diag (__netlink_diag_dump in net/netlink/diag.c) and TIPC
(tipc_nl_sk_walk in net/tipc/socket.c).
Crash stack (netlink_diag):
BUG: KASAN: slab-use-after-free in rhashtable_walk_next+0x365/0x3c0
Read of size 8 at addr ffff88801a9d2438 (freed kmalloc-2k, offset 1080)
Call Trace:
rhashtable_walk_next+0x365/0x3c0 (lib/rhashtable.c:1016)
__netlink_diag_dump+0x160/0x760 (net/netlink/diag.c:122)
netlink_diag_dump+0xc2/0x240
netlink_dump+0x5bc/0x1270
netlink_recvmsg+0x7a3/0x980
sock_recvmsg+0x1bc/0x200
__sys_recvfrom+0x1d4/0x2c0
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < 3ff7c1dbf722cf3fa538672452ba182318e0fcc3
(git)
Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < 4169d9fb92f313ff8e7e83d733c1ecdcc93eebd3 (git) Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < 8173f7e2ce67e6ca1d4763f3da14e5b01ce77456 (git) |
|
| Linux | Linux |
Affected:
4.18
Unaffected: 0 , < 4.18 (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2-rc5 , ≤ * (original_commit_for_fix) |
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CVE-2026-64562 (GCVE-0-2026-64562)
Vulnerability from nvd – Published: 2026-08-04 06:23 – Updated: 2026-08-04 06:23
VLAI
EPSS
VEX
Title
KVM: nVMX: Hide shadow VMCS right after VMCLEAR
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: nVMX: Hide shadow VMCS right after VMCLEAR
free_nested() frees the shadow VMCS while vmcs01 still points to it. But
because it is asynchronous with respect to loaded_vmcs_clear(), the vCPU
might migrate before the pointer is cleared and __loaded_vmcs_clear()
may then execute VMCLEAR.
The VMCS needs to stay attached until its explicit VMCLEAR completes, but
then it can be hidden and the page safely freed.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 , < af56298e9d86e6098cd1d2e155cb2949b7c45412
(git)
Affected: 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 , < 589419470030a89f16cf19300658b6dc644ca946 (git) Affected: 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 , < 8001d2ce9d9bd09118ce523aef595aa094573ae3 (git) Affected: 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 , < 1dabef6e206568bf9d9ade74f6e56a48ea35695d (git) Affected: 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 , < 622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 (git) |
|
| Linux | Linux |
Affected:
4.9
Unaffected: 0 , < 4.9 (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2-rc5 , ≤ * (original_commit_for_fix) |
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CVE-2026-64561 (GCVE-0-2026-64561)
Vulnerability from nvd – Published: 2026-08-04 06:23 – Updated: 2026-08-04 06:23
VLAI
EPSS
VEX
Title
KVM: x86: Check for invalid/obsolete root *after* making MMU pages available
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86: Check for invalid/obsolete root *after* making MMU pages available
Check for a "stale" page fault, i.e. for an invalid and/or obsolete root,
after making MMU pages available for the shadow MMU. If reclaiming shadow
pages zaps an in-use root, i.e. marks it invalid, then KVM will attempt to
map memory into an invalid root. On its own, populating an invalid root is
"fine", but because child shadow pages inherit their parent's role, any
children created during the map/fetch will be created as invalid pages,
thus violating KVM's invariant that invalid pages are never on the list of
active MMU pages.
Note, the underlying flaw has existed since KVM first started tracking
invalid roots in 2008 (commit 2e53d63acba7, "KVM: MMU: ignore zapped root
pagetables"), but the true badness only came along in 2020 (Linux 5.9)
with the invariant that invalid shadow pages can't be on the list of
active pages.
Note #2, inheriting role.invalid when creating child shadow pages is also
far from ideal; that flaw will be addressed separately.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
f95eec9bed76d42194c23153cb1cc8f186bf91cb , < 35e77467610c4a37cb0ff54ee56b85f73b1f5700
(git)
Affected: f95eec9bed76d42194c23153cb1cc8f186bf91cb , < 0026dbb7de8ea76e97d6edf42fc3cc084564e2bf (git) Affected: f95eec9bed76d42194c23153cb1cc8f186bf91cb , < f3477a6a4164f15287444eda685b5f6405dbd1e5 (git) Affected: f95eec9bed76d42194c23153cb1cc8f186bf91cb , < bce0d3c26e2c761a4bf43c8949f333fc7374eb2d (git) Affected: f95eec9bed76d42194c23153cb1cc8f186bf91cb , < 2abd5287f08319fa35764566b15c6e22cb1068db (git) |
|
| Linux | Linux |
Affected:
5.9
Unaffected: 0 , < 5.9 (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2-rc5 , ≤ * (original_commit_for_fix) |
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CVE-2022-4994 (GCVE-0-2022-4994)
Vulnerability from nvd – Published: 2026-07-30 09:18 – Updated: 2026-07-30 09:18
VLAI
EPSS
VEX
Title
KVM: x86: wean fast IN from emulator_pio_in
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86: wean fast IN from emulator_pio_in
Use __emulator_pio_in() directly for fast PIO instead of bouncing through
emulator_pio_in() now that __emulator_pio_in() fills "val" when handling
in-kernel PIO. vcpu->arch.pio.count is guaranteed to be '0', so this a
pure nop.
emulator_pio_in_emulated is now the last caller of emulator_pio_in.
No functional change intended.
Severity
No CVSS data available.
Assigner
References
1 reference
Impacted products
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CVE-2026-64560 (GCVE-0-2026-64560)
Vulnerability from nvd – Published: 2026-07-29 16:47 – Updated: 2026-07-30 11:10
VLAI
EPSS
VEX
Title
posix-cpu-timers: Prevent UAF caused by non-leader exec() race
Summary
In the Linux kernel, the following vulnerability has been resolved:
posix-cpu-timers: Prevent UAF caused by non-leader exec() race
Wongi and Jungwoo decoded and reported a non-leader exec() related race
which can result in an UAF:
sys_timer_delete() exec()
posix_cpu_timer_del()
// Observes old leader
p = pid_task(pid, pid_type); de_thread()
switch_leader();
release_task(old_leader)
__exit_signal(old_leader)
sighand = lock(old_leader, sighand);
posix_cpu_timers*_exit();
sighand = lock_task_sighand(p) unhash_task(old_leader);
sh = lock(p, sighand) old_leader->sighand = NULL;
unlock(sighand);
(p->sighand == NULL)
unlock(sh)
return NULL;
// Returns without action
if(!sighand)
return 0;
free_posix_timer();
This is "harmless" unless the deleted timer was armed and enqueued in
p->signal because on exec() a TGID targeted timer is inherited.
As sys_timer_delete() freed the underlying posix timer object
run_posix_cpu_timers() or any timerqueue related add/delete operations on
other timers will access the freed object's timerqueue node, which results
in an UAF.
There is a similar problem vs. posix_cpu_timer_set(). For regular posix
timers it just transiently returns -ESRCH to user space, but for the use
case in do_cpu_nanosleep() it's the same UAF just that the k_itimer is
allocated on the stack.
Also posix_cpu_timer_rearm() fails to rearm the timer, which means it stops
to expire.
While debating solutions Frederic pointed out another problem:
posix_cpu_timer_del(tmr)
__exit_signal(p)
posix_cpu_timers*_exit(p);
unhash_task(p);
p->sighand = NULL;
sh = lock_task_sighand(p)
sighand = p->sighand;
if (!sighand)
return NULL;
lock(sighand);
if (!sh)
WARN_ON_ONCE(timer_queued(tmr));
On weakly ordered architectures it is not guaranteed that
posix_cpu_timer_del() will observe the stores in posix_cpu_timers*_exit()
when p->sighand is observed as NULL, which means the WARN() can be a false
positive.
Solve these issues by:
1) Changing the store in __exit_signal() to smp_store_release().
2) Adding a smp_acquire__after_ctrl_dep() into the !sighand path
of lock_task_sighand().
3) Creating a helper function for looking up the task and locking sighand
which does not return when sighand == NULL. Instead it retries the
task lookup and only if that fails it gives up.
4) Using that helper in the three affected functions.
#1/#2 ensures that the reader side which observes sighand == NULL also
observes all preceeding stores, i.e. the stores in posix_cpu_timers*_exit()
and the ones in unhash_task().
#3 ensures that the above described non-leader exec() situation is handled
gracefully. When the task lookup returns the old leader, but sighand ==
NULL then it retries. In the non-leader exec() case the subsequent task
lookup will observe the new leader due to #1/#2. In normal exit() scenarios
the subsequent lookup fails.
When the task lookup fails, the function also checks whether the timer is
still enqueued and issues a warning if that's the case. Unfortunately there
is nothing which can be done about it, but as the task is already not
longer visible the timer should not be accessed anymore. This check also
requires memory ordering, which is not provided when the first lookup
fails. To achieve that the check is preceeded by a smp_rmb() which pairs
with the smp_wmb() in write_seqlock() in __exit_signal(). That ensures that
the stores in posix_cpu_timers*_exit() are visible.
The history of the non-leader exec() issue goes back to the early days of
posix CPU timers, which stored a pointer to the group leader task in the
timer. That obviously fails when a non-leader exec() switches the leader.
commit e0a70217107e ("posix-cpu-timers: workaround to suppress the problems
with mt exec") added a temporary workaround for that in 2010 which surv
---truncated---
Severity
7.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < 67aa823e3e8c229c6d374df79c804f6721cb83b6
(git)
Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < d8bcb28abad857f1415da7656f19b2ada90af04f (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < cc35ddbc497311e0b6b9a6a6a4f4d1217d6ab1aa (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < 12a891c773aeb5823d63dbd0cb2ab931d6c21c9b (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < e74443f5db0037c556ef436fa64b88bf4ea08f83 (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < 6a7ecc25abe6f0fecc6e62a05096987200edbd02 (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < ad1cafa1bdaa71da85d71cac053838bbe97852b6 (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < 920f893f735e92ba3a1cd9256899a186b161928d (git) |
|
| Linux | Linux |
Affected:
5.7
Unaffected: 0 , < 5.7 (semver) Unaffected: 5.10.262 , ≤ 5.10.* (semver) Unaffected: 5.15.213 , ≤ 5.15.* (semver) Unaffected: 6.1.180 , ≤ 6.1.* (semver) Unaffected: 6.6.147 , ≤ 6.6.* (semver) Unaffected: 6.12.100 , ≤ 6.12.* (semver) Unaffected: 6.18.41 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nposix-cpu-timers: Prevent UAF caused by non-leader exec() race\n\nWongi and Jungwoo decoded and reported a non-leader exec() related race\nwhich can result in an UAF:\n\n sys_timer_delete()\t\t\texec()\n posix_cpu_timer_del()\n // Observes old leader\n p = pid_task(pid, pid_type);\t\tde_thread()\n \t\t\t\t\t switch_leader();\n\t\t\t\t\t release_task(old_leader)\n\t\t\t\t\t __exit_signal(old_leader)\n\t\t\t\t\t sighand = lock(old_leader, sighand);\n\t\t\t\t\t posix_cpu_timers*_exit();\n sighand = lock_task_sighand(p)\t unhash_task(old_leader);\n sh = lock(p, sighand)\t \t old_leader-\u003esighand = NULL;\n\t\t\t\t\t unlock(sighand);\n (p-\u003esighand == NULL)\n\tunlock(sh)\n\treturn NULL;\n\n // Returns without action\n if(!sighand)\n return 0;\n free_posix_timer();\n\nThis is \"harmless\" unless the deleted timer was armed and enqueued in\np-\u003esignal because on exec() a TGID targeted timer is inherited.\n\nAs sys_timer_delete() freed the underlying posix timer object\nrun_posix_cpu_timers() or any timerqueue related add/delete operations on\nother timers will access the freed object\u0027s timerqueue node, which results\nin an UAF.\n\nThere is a similar problem vs. posix_cpu_timer_set(). For regular posix\ntimers it just transiently returns -ESRCH to user space, but for the use\ncase in do_cpu_nanosleep() it\u0027s the same UAF just that the k_itimer is\nallocated on the stack.\n\nAlso posix_cpu_timer_rearm() fails to rearm the timer, which means it stops\nto expire.\n\nWhile debating solutions Frederic pointed out another problem:\n\n posix_cpu_timer_del(tmr)\n\t\t\t\t\t__exit_signal(p)\n\t\t\t\t\t posix_cpu_timers*_exit(p);\n\t\t\t\t\t unhash_task(p);\n\t\t\t\t\t p-\u003esighand = NULL;\n sh = lock_task_sighand(p)\n sighand = p-\u003esighand;\n\tif (!sighand)\n\t return NULL;\n\tlock(sighand);\n\n if (!sh)\n\tWARN_ON_ONCE(timer_queued(tmr));\n\nOn weakly ordered architectures it is not guaranteed that\nposix_cpu_timer_del() will observe the stores in posix_cpu_timers*_exit()\nwhen p-\u003esighand is observed as NULL, which means the WARN() can be a false\npositive.\n\nSolve these issues by:\n\n 1) Changing the store in __exit_signal() to smp_store_release().\n\n 2) Adding a smp_acquire__after_ctrl_dep() into the !sighand path\n of lock_task_sighand().\n\n 3) Creating a helper function for looking up the task and locking sighand\n which does not return when sighand == NULL. Instead it retries the\n task lookup and only if that fails it gives up.\n\n 4) Using that helper in the three affected functions.\n\n#1/#2 ensures that the reader side which observes sighand == NULL also\nobserves all preceeding stores, i.e. the stores in posix_cpu_timers*_exit()\nand the ones in unhash_task().\n\n#3 ensures that the above described non-leader exec() situation is handled\ngracefully. When the task lookup returns the old leader, but sighand ==\nNULL then it retries. In the non-leader exec() case the subsequent task\nlookup will observe the new leader due to #1/#2. In normal exit() scenarios\nthe subsequent lookup fails.\n\nWhen the task lookup fails, the function also checks whether the timer is\nstill enqueued and issues a warning if that\u0027s the case. Unfortunately there\nis nothing which can be done about it, but as the task is already not\nlonger visible the timer should not be accessed anymore. This check also\nrequires memory ordering, which is not provided when the first lookup\nfails. To achieve that the check is preceeded by a smp_rmb() which pairs\nwith the smp_wmb() in write_seqlock() in __exit_signal(). That ensures that\nthe stores in posix_cpu_timers*_exit() are visible.\n\nThe history of the non-leader exec() issue goes back to the early days of\nposix CPU timers, which stored a pointer to the group leader task in the\ntimer. That obviously fails when a non-leader exec() switches the leader.\ncommit e0a70217107e (\"posix-cpu-timers: workaround to suppress the problems\nwith mt exec\") added a temporary workaround for that in 2010 which surv\n---truncated---"
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CVE-2026-64559 (GCVE-0-2026-64559)
Vulnerability from nvd – Published: 2026-07-29 16:31 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
s390/pkey: Check length in PKEY_VERIFYPROTK ioctl
Summary
In the Linux kernel, the following vulnerability has been resolved:
s390/pkey: Check length in PKEY_VERIFYPROTK ioctl
Explicitly check the buffer length request structure provided by
user-space and fail, if it exceeds the buffer size.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 0a9e34ccbe772b8f321388cdbdf4f22b94e513e7
(git)
Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 693bf91d4db134f9b1c2840c8e287eee3d993bac (git) Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 7e7e03848c918aa0acad5ffd75d929e3afec1554 (git) Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970 (git) |
|
| Linux | Linux |
Affected:
6.12
Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-64558 (GCVE-0-2026-64558)
Vulnerability from nvd – Published: 2026-07-29 16:31 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
s390/pkey: Check length in pkey_pckmo handler implementation
Summary
In the Linux kernel, the following vulnerability has been resolved:
s390/pkey: Check length in pkey_pckmo handler implementation
Explicitly check the length of the target buffer in the pkey_pckmo
implementation of the key_to_protkey() handler function. The handler
function fails, if the generated output data exceeds the length of the
provided target buffer.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 02028a24e26d85262ab9c8fc4344e1f3503007fc
(git)
Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 433e5e70cdc1edf382d28d08a885b22e2b98b7da (git) Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 614aa0491c7a190556c2345dddee0b6f5ed90989 (git) Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 1ac287e2af9a9112fe271427ef45eceb26bce8b4 (git) |
|
| Linux | Linux |
Affected:
6.12
Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-64557 (GCVE-0-2026-64557)
Vulnerability from nvd – Published: 2026-07-29 08:01 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_new_connection_cb()
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_new_connection_cb()
l2cap_sock_new_connection_cb() returned l2cap_pi(sk)->chan after
release_sock(parent). Once the parent lock is dropped the newly
enqueued child socket sk is reachable via the accept queue, so another
task can accept and free it before the callback dereferences sk,
resulting in a use-after-free.
Rework the ->new_connection() op so the core, rather than the callback,
owns the child channel's lifetime. The op now receives a pre-allocated
new_chan and returns an errno instead of allocating and returning a
channel. l2cap_new_connection() allocates the child channel and links
it into the conn list via __l2cap_chan_add() before invoking the
callback, so the conn-list reference keeps the channel alive once
release_sock(parent) exposes the socket to other tasks.
Channel configuration that was duplicated in l2cap_sock_init() and the
various new_connection callbacks is consolidated into
l2cap_chan_set_defaults(), which now inherits from the parent channel
when one is supplied.
Severity
8.8 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
8ffb929098a56939ac71509302eeab5b207bf262 , < b39298044e5534612511a2ff5de03ba5f6e7a820
(git)
Affected: 8ffb929098a56939ac71509302eeab5b207bf262 , < 8c37e4338c801ebb8cee52436c01c41e009f6e87 (git) Affected: 8ffb929098a56939ac71509302eeab5b207bf262 , < 84e718b6a814edc84159361f9f454a4e92ae91ae (git) Affected: 8ffb929098a56939ac71509302eeab5b207bf262 , < 36da806f7fbaee56ad9e81859deec203f9728700 (git) Affected: 8ffb929098a56939ac71509302eeab5b207bf262 , < 733e76e74e406c1d1ddc7369420dd8a47f48bb8a (git) Affected: 8ffb929098a56939ac71509302eeab5b207bf262 , < 6fef032af0092ed5ccb767239a9ac1bc38c08a40 (git) |
|
| Linux | Linux |
Affected:
3.13
Unaffected: 0 , < 3.13 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix) |
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CVE-2026-64556 (GCVE-0-2026-64556)
Vulnerability from nvd – Published: 2026-07-29 08:01 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
perf/core: Detach event groups during remove_on_exec
Summary
In the Linux kernel, the following vulnerability has been resolved:
perf/core: Detach event groups during remove_on_exec
perf_event_remove_on_exec() removes events by calling
perf_event_exit_event(). For top-level events, this removes the event from
the context with DETACH_EXIT only.
This can leave inconsistent group state when a removed event is a group
leader and the group contains siblings without remove_on_exec. If the group
was active, the surviving siblings can remain active and attached to the
removed leader's sibling list, but are no longer represented by a valid
group leader on the PMU context active lists.
A later close of the removed leader uses DETACH_GROUP and can promote the
still-active siblings from this stale group state. The next schedule-in can
then add an already-linked active_list entry again, corrupting the PMU
context active list.
With DEBUG_LIST enabled, this is caught as a list_add double-add in
merge_sched_in().
Fix this by detaching group relationships when remove_on_exec removes an
event. This preserves the existing task-exit and revoke behavior, while
ensuring surviving siblings are ungrouped before the removed event leaves
the context.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
2e498d0a74e5b88a6689ae1b811f247f91ff188e , < 4cdb1b3ab96eb1b7eb70bc5c82fede334bd60df2
(git)
Affected: 2e498d0a74e5b88a6689ae1b811f247f91ff188e , < 39358e856fb89e62e3c8d7389a2dc4ec33dbe90e (git) Affected: 2e498d0a74e5b88a6689ae1b811f247f91ff188e , < a2d5d3ee7b6e3953114726b1521e62123ab5b043 (git) Affected: 2e498d0a74e5b88a6689ae1b811f247f91ff188e , < 06ccef0434e98058ddae7bcebc901f93d22b7653 (git) Affected: 2e498d0a74e5b88a6689ae1b811f247f91ff188e , < 037a3c43edfb597665dd34457cd22b14692f2ba3 (git) |
|
| Linux | Linux |
Affected:
5.13
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CVE-2026-64555 (GCVE-0-2026-64555)
Vulnerability from nvd – Published: 2026-07-27 20:10 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
KVM: arm64: nv: Fix SPSR_EL2 restore in kvm_hyp_handle_mops()
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: nv: Fix SPSR_EL2 restore in kvm_hyp_handle_mops()
kvm_hyp_handle_mops() resets the single-step state machine as part of
rewinding state for a MOPS exception by modifying vcpu_cpsr() and
writing the result directly into hardware.
In the case of nested virtualization, vcpu_cpsr() is a synthetic value
such that the rest of KVM can deal with vEL2 cleanly. That means the
value requires translation before being written into hardware, which is
unfortunately missing from the MOPS handler.
Fix it by directly modifying SPSR_EL2 and avoiding the synthetic state
altogether, which will be resynchronized on the next 'full' exit back
to KVM.
Severity
8.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
2de451a329cf662beeba71f63c7f83ee24ca6642 , < 10a568010e827108d149779908850afaec898846
(git)
Affected: 2de451a329cf662beeba71f63c7f83ee24ca6642 , < 884b44256041ec6b2dcbe8e6a67384d26145cba1 (git) Affected: 2de451a329cf662beeba71f63c7f83ee24ca6642 , < dd3b237eb7780d65eae296d3d3a70012b6e7a02f (git) Affected: 2de451a329cf662beeba71f63c7f83ee24ca6642 , < ff1022c3de46753eb7eba2f6efd990569e66ff95 (git) |
|
| Linux | Linux |
Affected:
6.7
Unaffected: 0 , < 6.7 (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc4 , ≤ * (original_commit_for_fix) |
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CVE-2026-64554 (GCVE-0-2026-64554)
Vulnerability from nvd – Published: 2026-07-27 20:10 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
netfilter: bridge: fix stale prevhdr pointer in br_ip6_fragment()
Summary
In the Linux kernel, the following vulnerability has been resolved:
netfilter: bridge: fix stale prevhdr pointer in br_ip6_fragment()
br_ip6_fragment() gets prevhdr, a pointer into the skb head, from
ip6_find_1stfragopt(), then calls skb_checksum_help(). For a cloned skb
skb_checksum_help() reallocates the head via pskb_expand_head(), leaving
prevhdr dangling. It is later dereferenced in ip6_frag_next(), causing a
use-after-free write.
Save prevhdr's offset before skb_checksum_help() and recompute it after,
like commit ef0efcd3bd3f ("ipv6: Fix dangling pointer when ipv6
fragment").
BUG: KASAN: slab-use-after-free in ip6_frag_next (net/ipv6/ip6_output.c:857)
Write of size 1 at addr ffff888013ff5016 by task exploit/141
Call Trace:
...
kasan_report (mm/kasan/report.c:595)
ip6_frag_next (net/ipv6/ip6_output.c:857)
br_ip6_fragment (net/ipv6/netfilter.c:212)
nf_ct_bridge_post (net/bridge/netfilter/nf_conntrack_bridge.c:407)
nf_hook_slow (net/netfilter/core.c:619)
br_forward_finish (net/bridge/br_forward.c:66)
__br_forward (net/bridge/br_forward.c:115)
maybe_deliver (net/bridge/br_forward.c:191)
br_flood (net/bridge/br_forward.c:245)
br_handle_frame_finish (net/bridge/br_input.c:229)
br_handle_frame (net/bridge/br_input.c:442)
...
packet_sendmsg (net/packet/af_packet.c:3114)
...
do_syscall_64 (arch/x86/entry/syscall_64.c:94)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)
Kernel panic - not syncing: Fatal exception in interrupt
Severity
8.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
764dd163ac922f8683b5bcd3007251ce7b26cd33 , < 8c10778ec674b67a07ea042fcba64270f3f38a5a
(git)
Affected: 764dd163ac922f8683b5bcd3007251ce7b26cd33 , < 2731efa6364e47934c96eb69e01ea131e8af8030 (git) Affected: 764dd163ac922f8683b5bcd3007251ce7b26cd33 , < 00c06ef8c018493943891a7d0ca82b71b24f3180 (git) Affected: 764dd163ac922f8683b5bcd3007251ce7b26cd33 , < c141f69d0a0fb16964dbc293650047e69bda8af7 (git) Affected: 764dd163ac922f8683b5bcd3007251ce7b26cd33 , < f2e6596d10783557aeb9668da2a3b4d19deb2001 (git) Affected: 764dd163ac922f8683b5bcd3007251ce7b26cd33 , < 1c4f67c89fd27c4df4c70b135c2c59627698b3c0 (git) Affected: 764dd163ac922f8683b5bcd3007251ce7b26cd33 , < 4ac981a8b7ce7aec99a52d08f8a8953e8e120067 (git) Affected: 764dd163ac922f8683b5bcd3007251ce7b26cd33 , < 86f3ce81dd2b4b0aa2c3016c989a943e4b1b643d (git) |
|
| Linux | Linux |
Affected:
5.3
Unaffected: 0 , < 5.3 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc4 , ≤ * (original_commit_for_fix) |
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CVE-2026-64553 (GCVE-0-2026-64553)
Vulnerability from nvd – Published: 2026-07-27 20:10 – Updated: 2026-07-27 20:10
VLAI
EPSS
VEX
Title
net: psample: fix info leak in PSAMPLE_ATTR_DATA
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: psample: fix info leak in PSAMPLE_ATTR_DATA
psample open codes nla_put() presumably to avoid wiping
the data with 0s just to override it with packet data.
This open coding is missing clearing the pad, however,
each netlink attr is padded to 4B and data_len may
not be divisible by 4B.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
6ae0a6286171154661b74f7f550f9441c6008424 , < 0d3ea2ccddda442077fc44f11d873209c97ec50b
(git)
Affected: 6ae0a6286171154661b74f7f550f9441c6008424 , < 7fe7e6949964aa8ee6305f09db2dc9eede977bb3 (git) Affected: 6ae0a6286171154661b74f7f550f9441c6008424 , < e2fa322782a2d7d8078f7bb20817e0aa9f7c32e9 (git) Affected: 6ae0a6286171154661b74f7f550f9441c6008424 , < befe1ebe7fc2c65c80074bc34ceeb0a721ed3cd2 (git) Affected: 6ae0a6286171154661b74f7f550f9441c6008424 , < 48930f6c59fd0056c2de46ce52bfe27d9c9e5eb6 (git) Affected: 6ae0a6286171154661b74f7f550f9441c6008424 , < a6cfb924ad74efce254e99c197d2e3863de70868 (git) Affected: 6ae0a6286171154661b74f7f550f9441c6008424 , < 794a0d8bdbb39e083ed42caccb86d687a9b53570 (git) Affected: 6ae0a6286171154661b74f7f550f9441c6008424 , < aedd02af1f8b0bceb7f42f5a21c41634ca9ed390 (git) |
|
| Linux | Linux |
Affected:
4.11
Unaffected: 0 , < 4.11 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-64552 (GCVE-0-2026-64552)
Vulnerability from nvd – Published: 2026-07-27 20:10 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
virtio-net: fix len check in receive_big()
Summary
In the Linux kernel, the following vulnerability has been resolved:
virtio-net: fix len check in receive_big()
receive_big() bounds the device-announced length by
(big_packets_num_skbfrags + 1) * PAGE_SIZE. That is still too loose:
add_recvbuf_big() sets sg[1] to start at offset
sizeof(struct padded_vnet_hdr) into the first page, so the chain
actually carries hdr_len + (PAGE_SIZE - sizeof(padded_vnet_hdr)) +
big_packets_num_skbfrags * PAGE_SIZE bytes -- 20 bytes less than the
check allows for the common hdr_len == 12 case.
A malicious virtio backend can announce a len in that gap. page_to_skb()
then walks one frag past the page chain, storing a NULL page->private
into skb_shinfo()->frags[MAX_SKB_FRAGS], which is both an out-of-bounds
write past the static frag array and a NULL frag handed up the rx path.
Bound len by the size add_recvbuf_big() actually advertised.
Severity
8.4 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
82f9028e83944a9eee5229cbc6fee9be1de8a62d , < f9451d0fd5ba635dcabb49bfe456a6db734a8986
(git)
Affected: 946dec89c41726b94d31147ec528b96af0be1b5a , < 38e94d63e29f4a5c6eae87ee2c02101aaa321502 (git) Affected: 82fe78065450d2d07f36a22e2b6b44955cf5ca5b , < fbeb65154583879d556ea94cb2f15888e9470f3d (git) Affected: 0c716703965ffc5ef4311b65cb5d84a703784717 , < c7fc9adf4e006155f7f2aeda052fbcde25cdcc49 (git) Affected: 0c716703965ffc5ef4311b65cb5d84a703784717 , < e6b8463b7d791f3886d7584259d6e9f06a69f12e (git) Affected: 0c716703965ffc5ef4311b65cb5d84a703784717 , < 9e5ad06ea826322ce8c58b4a68442a96f600c3c4 (git) Affected: 3e9d89f2ecd3636bd4cbdfd0b2dfdaf58f9882e2 (git) Affected: 6.1.159 , < 6.1.178 (semver) Affected: 6.6.117 , < 6.6.145 (semver) Affected: 6.12.58 , < 6.12.97 (semver) Affected: 6.17.8 , < 6.18 (semver) |
|
| Linux | Linux |
Affected:
6.18
Unaffected: 0 , < 6.18 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-64551 (GCVE-0-2026-64551)
Vulnerability from nvd – Published: 2026-07-27 20:10 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
sctp: validate STALE_COOKIE cause length before reading staleness
Summary
In the Linux kernel, the following vulnerability has been resolved:
sctp: validate STALE_COOKIE cause length before reading staleness
When an ERROR chunk with a STALE_COOKIE cause is received in the
COOKIE_ECHOED state, sctp_sf_do_5_2_6_stale() reads the 4-byte Measure
of Staleness that follows the cause header:
err = (struct sctp_errhdr *)(chunk->skb->data);
stale = ntohl(*(__be32 *)((u8 *)err + sizeof(*err)));
err is the first cause in the chunk, not the STALE_COOKIE cause that
caused the dispatch, and nothing guarantees the staleness field is
present. sctp_walk_errors() only requires a cause to be as long as the
4-byte header, so for a STALE_COOKIE cause of length 4 the read runs
past the cause, and for a minimal ERROR chunk past skb->tail. The value
is echoed to the peer in the Cookie Preservative of the reply INIT,
leaking uninitialized memory.
sctp_sf_cookie_echoed_err() already walks to the STALE_COOKIE cause, so
check its length there and pass it to sctp_sf_do_5_2_6_stale(), which
reads that cause instead of the first one. A STALE_COOKIE cause too
short to hold the staleness field is discarded.
The read is reachable by any peer that can drive an association into
COOKIE_ECHOED, including an unprivileged process using a raw SCTP socket
in a user and network namespace.
Severity
9.1 (Critical)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6022da37786701df1fc5dd946a6dcba59d5473b1
(git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 861f884f5471632c731cbbd612a1c072e391a624 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 588706ebaf8cdb4a4161602949eba365514b1db1 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a257b41ddfe9e327b26581ad2777f04b23ac73f5 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 08a8f2d13f703924316e9aeac863a88ef50990c7 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ebe0a55d954fa8da383b6192edb8f763dcb002d5 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < bbd6b2ea966cf57b6ae095cf5a8dbc993cd197a0 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1cd23ca80784223fa2204e16203f754da4e821f8 (git) |
|
| Linux | Linux |
Affected:
2.6.12
Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc4 , ≤ * (original_commit_for_fix) |
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CVE-2026-64550 (GCVE-0-2026-64550)
Vulnerability from nvd – Published: 2026-07-27 20:10 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
net: qualcomm: rmnet: validate MAP frame length before ingress parsing
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: qualcomm: rmnet: validate MAP frame length before ingress parsing
When ingress deaggregation is disabled, rmnet_map_ingress_handler() passes
the skb straight to __rmnet_map_ingress_handler(), skipping the length
validation that rmnet_map_deaggregate() performs on the aggregated path.
The parser then dereferences the MAP header and csum header/trailer based on
the on-wire pkt_len without checking skb->len, so a short frame is read out
of bounds:
BUG: KASAN: slab-out-of-bounds in rmnet_map_checksum_downlink_packet
Read of size 1 at addr ffff88801118ed00 by task exploit/147
Call Trace:
...
rmnet_map_checksum_downlink_packet (drivers/net/ethernet/qualcomm/rmnet/rmnet_map_data.c:413)
__rmnet_map_ingress_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:96)
rmnet_rx_handler (drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c:129)
__netif_receive_skb_core.constprop.0 (net/core/dev.c:6089)
netif_receive_skb (net/core/dev.c:6460)
tun_get_user (drivers/net/tun.c:1955)
tun_chr_write_iter (drivers/net/tun.c:2001)
vfs_write (fs/read_write.c:688)
ksys_write (fs/read_write.c:740)
do_syscall_64 (arch/x86/entry/syscall_64.c:94)
...
Factor that validation out of rmnet_map_deaggregate() into
rmnet_map_validate_packet_len() and run it on the no-aggregation path too.
The MAP header is bounds-checked first, since this path can receive a frame
shorter than the header.
Severity
7.3 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
ceed73a2cf4aff2921802aa3d21d45280677547d , < ed25befc8c36f896b5878f9078faddb67fd7e2d0
(git)
Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < a54d76d176e50d2fdbd39b7231efe256170339e4 (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < 00f4c366dbca16a40772c3b7ec2d8cba839e9724 (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < 3868c3244369ab709a90c9aad7534d406009b824 (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < 14eb0c9491385d5361a292ea4974aec0e6887299 (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < 1b12612c367e4be9b0814c0468e7e687835315b4 (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < 231a8a4b76cb1b1827b3b19d7b3603642f5aaaef (git) Affected: ceed73a2cf4aff2921802aa3d21d45280677547d , < f0f1887a9e30712a1df03e152dce6fb91344b1f3 (git) |
|
| Linux | Linux |
Affected:
4.14
Unaffected: 0 , < 4.14 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix) |
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CVE-2026-64549 (GCVE-0-2026-64549)
Vulnerability from nvd – Published: 2026-07-27 20:10 – Updated: 2026-07-27 20:10
VLAI
EPSS
VEX
Title
Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()
bpa10x_setup() sends the vendor command 0xfc0e and passes the response
to bt_dev_info() and hci_set_fw_info() as a "%s" string starting at
skb->data + 1, without checking the length:
bt_dev_info(hdev, "%s", (char *)(skb->data + 1));
hci_set_fw_info(hdev, "%s", skb->data + 1);
A device that returns a one-byte response (status only) leaves
skb->data + 1 past the end of the data, and the %s walk reads adjacent
slab memory until it meets a NUL. The same happens when the payload is
not NUL-terminated within skb->len. The out-of-bounds bytes end up in
the kernel log and the firmware-info debugfs file.
Print the revision string with a bounded "%.*s" limited to skb->len - 1
instead. This keeps the string readable for well-behaved devices while
never reading past the received data, and does not fail setup, so a
device returning a short or unterminated response keeps working.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
ddd68ec8f4847b460c9f580076eafe13b031a6fd , < 1813add71e386f77b3040e6c8dc9b7b3ff965a6c
(git)
Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < bd56c23f1f8681a2857ee924a8bd3abf87c8913b (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < 7a64f39ebe1bacd9004a62eceadac0b122ec3cc2 (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < f80b4afe893dffa9fabdbf80fb4d6782b24a6793 (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < 4b4008dda1d0c6e598d7865631ad4eda63a560f0 (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < bfc9e7be289df11e8e38c98cd78019d67fdd0bd5 (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < a8e169d308775039200bb9c905c7ce420db6e8c5 (git) Affected: ddd68ec8f4847b460c9f580076eafe13b031a6fd , < dd068ef044128db655f48323a4acfd5907e04903 (git) |
|
| Linux | Linux |
Affected:
4.4
Unaffected: 0 , < 4.4 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix) |
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CVE-2026-64548 (GCVE-0-2026-64548)
Vulnerability from nvd – Published: 2026-07-27 20:10 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()
Summary
In the Linux kernel, the following vulnerability has been resolved:
bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()
When the scatterlist ring is full or nearly full, bpf_msg_push_data()
enters a copy fallback path and computes copy + len for the page
allocation size. Since len comes from BPF with arg3_type = ARG_ANYTHING
and both are u32, a crafted len can wrap the sum to a small value,
causing an undersized allocation followed by an out-of-bounds memcpy.
BUG: unable to handle page fault for address: ffffed104089a402
Oops: Oops: 0000 [#1] SMP KASAN NOPTI
Call Trace:
__asan_memcpy (mm/kasan/shadow.c:105)
bpf_msg_push_data (net/core/filter.c:2852 net/core/filter.c:2788)
bpf_prog_9ed8b5711920a7d7+0x2e/0x36
sk_psock_msg_verdict (net/core/skmsg.c:934)
tcp_bpf_sendmsg (net/ipv4/tcp_bpf.c:421 net/ipv4/tcp_bpf.c:584)
__sys_sendto (net/socket.c:2206)
do_syscall_64 (arch/x86/entry/syscall_64.c:94)
entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)
Add an overflow check before the allocation.
Severity
8.4 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5
(git)
Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < a12b1575f9feabd91695a9e9d004862f7195fa25 (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < 888706a76286c547bd035432602571e8024b5305 (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < db77b6bb6e6edb79b10b4efcce346eec5582d588 (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < 4e40056bb5c829f0423f0a6694a0477726d2147e (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < bd004716ba75fed6d185795c85cdc92540ebeaab (git) Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < 0c0a8ed85349dae298712d79cb276acfeb794d82 (git) |
|
| Linux | Linux |
Affected:
4.20
Unaffected: 0 , < 4.20 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-64565 (GCVE-0-2026-64565)
Vulnerability from cvelistv5 – Published: 2026-08-04 06:23 – Updated: 2026-08-04 06:23
VLAI
EPSS
VEX
Title
Input: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()
Summary
In the Linux kernel, the following vulnerability has been resolved:
Input: ims-pcu - fix heap-buffer-overflow in ims_pcu_process_data()
The `ims_pcu_process_data()` processes incoming URB data byte by byte.
However, it fails to check if the `read_pos` index exceeds
IMS_PCU_BUF_SIZE.
If a malicious USB device sends a packet larger than IMS_PCU_BUF_SIZE,
`read_pos` will increment indefinitely. Moreover, since `read_pos` is
located immediately after `read_buf`, the attacker can overwrite
`read_pos` itself to arbitrarily control the index.
This manipulated `read_pos` is subsequently used in
`ims_pcu_handle_response()` to copy data into `cmd_buf`, leading to a
heap buffer overflow.
Specifically, an attacker can overwrite the `cmd_done.wait.head` located
at offset 136 relative to `cmd_buf` in the `ims_pcu_handle_response()`.
Consequently, when the driver calls `complete(&pcu->cmd_done)`, it
triggers a control flow hijack by using the manipulated pointer.
Fix this by adding a bounds check for `read_pos` before writing to
`read_buf`. If the packet is too long, discard it, log a warning,
and reset the parser state.
[dtor: factor out resetting packet state, reset checksum as well]
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
628329d52474323938a03826941e166bc7c8eff4 , < 40bbbf2e91fd60715525bf0405c67876af817edf
(git)
Affected: 628329d52474323938a03826941e166bc7c8eff4 , < ca9f8c09845fb8c51b6d447f6428eecd1b8b0a49 (git) Affected: 628329d52474323938a03826941e166bc7c8eff4 , < d03a740e087de7dcb2a26dc1123377bd3d1d84ca (git) Affected: 628329d52474323938a03826941e166bc7c8eff4 , < 875115b82c295277b81b6dfee7debc725f44e854 (git) |
|
| Linux | Linux |
Affected:
3.10
Unaffected: 0 , < 3.10 (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
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CVE-2026-64564 (GCVE-0-2026-64564)
Vulnerability from cvelistv5 – Published: 2026-08-04 06:23 – Updated: 2026-08-04 06:23
VLAI
EPSS
VEX
Title
sctp: don't free the ASCONF's own transport in DEL-IP processing
Summary
In the Linux kernel, the following vulnerability has been resolved:
sctp: don't free the ASCONF's own transport in DEL-IP processing
sctp_process_asconf() caches the transport the ASCONF chunk is processed
against in asconf->transport (== chunk->transport, set once in sctp_rcv()).
For an ASCONF located through its Address Parameter by
__sctp_rcv_asconf_lookup(), that cached transport corresponds to the
Address Parameter, which need not be the packet's source address.
sctp_process_asconf_param() rejects a DEL-IP for the packet source address
(ADDIP D8, SCTP_ERROR_DEL_SRC_IP), but nothing protects asconf->transport.
A single ASCONF can therefore carry, in order:
[Address Parameter L] [DEL-IP L] [DEL-IP 0.0.0.0]
where L differs from the source. The DEL-IP for L passes the D8 check and
calls sctp_assoc_rm_peer() on the transport that asconf->transport still
points at, freeing it (RCU-deferred). The following wildcard DEL-IP then
reuses the now-dangling asconf->transport in sctp_assoc_set_primary() and
sctp_assoc_del_nonprimary_peers(): set_primary() dereferences the freed
transport (->ipaddr, ->state) and plants the dangling pointer into
asoc->peer.primary_path / active_path, and del_nonprimary_peers(), keeping
only the pointer that is no longer on the list, removes every real
transport, leaving the association with a transport_count of 0 and
primary_path/active_path pointing at freed memory.
Reject a DEL-IP that targets the transport the ASCONF is being processed
against, mirroring the existing source-address guard, so the wildcard
branch can never reuse a freed transport.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
42e30bf3463cd37d73839376662cb79b4d5c416c , < fedeb4468987bcaff85fe3061de5ae052d414740
(git)
Affected: 42e30bf3463cd37d73839376662cb79b4d5c416c , < 74e8f3e7114f0e26d1b2c4c048044db9fcc27603 (git) Affected: 42e30bf3463cd37d73839376662cb79b4d5c416c , < 85aca407c560aba81b5ce9d3d6cf94c74077d19b (git) Affected: 42e30bf3463cd37d73839376662cb79b4d5c416c , < d136b29bf91dd8e3161281b87de597b7311d9462 (git) Affected: 42e30bf3463cd37d73839376662cb79b4d5c416c , < 9b2854f86f0b56e9027d68e7a3fc909d1a9b566f (git) |
|
| Linux | Linux |
Affected:
2.6.25
Unaffected: 0 , < 2.6.25 (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2-rc5 , ≤ * (original_commit_for_fix) |
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CVE-2026-64563 (GCVE-0-2026-64563)
Vulnerability from cvelistv5 – Published: 2026-08-04 06:23 – Updated: 2026-08-04 06:23
VLAI
EPSS
VEX
Title
rhashtable: clear stale iter->p on table restart
Summary
In the Linux kernel, the following vulnerability has been resolved:
rhashtable: clear stale iter->p on table restart
rhashtable_walk_start_check() has two restart paths when resuming a walk.
When iter->walker.tbl is valid, it re-validates iter->p against the table
and sets iter->p = NULL if the object is gone. When iter->walker.tbl is
NULL (table was freed during resize), it resets slot and skip but forgets
to clear iter->p.
rhashtable_walk_next() then dereferences the stale iter->p, reading
freed memory. This is a use-after-free.
Any caller that does multi-fragment rhashtable walks across
walk_stop/walk_start boundaries is affected. Concrete cases include
netlink_diag (__netlink_diag_dump in net/netlink/diag.c) and TIPC
(tipc_nl_sk_walk in net/tipc/socket.c).
Crash stack (netlink_diag):
BUG: KASAN: slab-use-after-free in rhashtable_walk_next+0x365/0x3c0
Read of size 8 at addr ffff88801a9d2438 (freed kmalloc-2k, offset 1080)
Call Trace:
rhashtable_walk_next+0x365/0x3c0 (lib/rhashtable.c:1016)
__netlink_diag_dump+0x160/0x760 (net/netlink/diag.c:122)
netlink_diag_dump+0xc2/0x240
netlink_dump+0x5bc/0x1270
netlink_recvmsg+0x7a3/0x980
sock_recvmsg+0x1bc/0x200
__sys_recvfrom+0x1d4/0x2c0
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < 3ff7c1dbf722cf3fa538672452ba182318e0fcc3
(git)
Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < 4169d9fb92f313ff8e7e83d733c1ecdcc93eebd3 (git) Affected: 5d240a8936f6a1d3ece06701e8c4d830a2eca8a8 , < 8173f7e2ce67e6ca1d4763f3da14e5b01ce77456 (git) |
|
| Linux | Linux |
Affected:
4.18
Unaffected: 0 , < 4.18 (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2-rc5 , ≤ * (original_commit_for_fix) |
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CVE-2026-64562 (GCVE-0-2026-64562)
Vulnerability from cvelistv5 – Published: 2026-08-04 06:23 – Updated: 2026-08-04 06:23
VLAI
EPSS
VEX
Title
KVM: nVMX: Hide shadow VMCS right after VMCLEAR
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: nVMX: Hide shadow VMCS right after VMCLEAR
free_nested() frees the shadow VMCS while vmcs01 still points to it. But
because it is asynchronous with respect to loaded_vmcs_clear(), the vCPU
might migrate before the pointer is cleared and __loaded_vmcs_clear()
may then execute VMCLEAR.
The VMCS needs to stay attached until its explicit VMCLEAR completes, but
then it can be hidden and the page safely freed.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 , < af56298e9d86e6098cd1d2e155cb2949b7c45412
(git)
Affected: 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 , < 589419470030a89f16cf19300658b6dc644ca946 (git) Affected: 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 , < 8001d2ce9d9bd09118ce523aef595aa094573ae3 (git) Affected: 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 , < 1dabef6e206568bf9d9ade74f6e56a48ea35695d (git) Affected: 355f4fb1405ec29d0fac49b4d41fcd78cbd455d5 , < 622ebfac01ba4f9c0060cebd41257fe46fc4a0b3 (git) |
|
| Linux | Linux |
Affected:
4.9
Unaffected: 0 , < 4.9 (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2-rc5 , ≤ * (original_commit_for_fix) |
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CVE-2026-64561 (GCVE-0-2026-64561)
Vulnerability from cvelistv5 – Published: 2026-08-04 06:23 – Updated: 2026-08-04 06:23
VLAI
EPSS
VEX
Title
KVM: x86: Check for invalid/obsolete root *after* making MMU pages available
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86: Check for invalid/obsolete root *after* making MMU pages available
Check for a "stale" page fault, i.e. for an invalid and/or obsolete root,
after making MMU pages available for the shadow MMU. If reclaiming shadow
pages zaps an in-use root, i.e. marks it invalid, then KVM will attempt to
map memory into an invalid root. On its own, populating an invalid root is
"fine", but because child shadow pages inherit their parent's role, any
children created during the map/fetch will be created as invalid pages,
thus violating KVM's invariant that invalid pages are never on the list of
active MMU pages.
Note, the underlying flaw has existed since KVM first started tracking
invalid roots in 2008 (commit 2e53d63acba7, "KVM: MMU: ignore zapped root
pagetables"), but the true badness only came along in 2020 (Linux 5.9)
with the invariant that invalid shadow pages can't be on the list of
active pages.
Note #2, inheriting role.invalid when creating child shadow pages is also
far from ideal; that flaw will be addressed separately.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
f95eec9bed76d42194c23153cb1cc8f186bf91cb , < 35e77467610c4a37cb0ff54ee56b85f73b1f5700
(git)
Affected: f95eec9bed76d42194c23153cb1cc8f186bf91cb , < 0026dbb7de8ea76e97d6edf42fc3cc084564e2bf (git) Affected: f95eec9bed76d42194c23153cb1cc8f186bf91cb , < f3477a6a4164f15287444eda685b5f6405dbd1e5 (git) Affected: f95eec9bed76d42194c23153cb1cc8f186bf91cb , < bce0d3c26e2c761a4bf43c8949f333fc7374eb2d (git) Affected: f95eec9bed76d42194c23153cb1cc8f186bf91cb , < 2abd5287f08319fa35764566b15c6e22cb1068db (git) |
|
| Linux | Linux |
Affected:
5.9
Unaffected: 0 , < 5.9 (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2-rc5 , ≤ * (original_commit_for_fix) |
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CVE-2022-4994 (GCVE-0-2022-4994)
Vulnerability from cvelistv5 – Published: 2026-07-30 09:18 – Updated: 2026-07-30 09:18
VLAI
EPSS
VEX
Title
KVM: x86: wean fast IN from emulator_pio_in
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86: wean fast IN from emulator_pio_in
Use __emulator_pio_in() directly for fast PIO instead of bouncing through
emulator_pio_in() now that __emulator_pio_in() fills "val" when handling
in-kernel PIO. vcpu->arch.pio.count is guaranteed to be '0', so this a
pure nop.
emulator_pio_in_emulated is now the last caller of emulator_pio_in.
No functional change intended.
Severity
No CVSS data available.
Assigner
References
1 reference
Impacted products
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CVE-2026-64560 (GCVE-0-2026-64560)
Vulnerability from cvelistv5 – Published: 2026-07-29 16:47 – Updated: 2026-07-30 11:10
VLAI
EPSS
VEX
Title
posix-cpu-timers: Prevent UAF caused by non-leader exec() race
Summary
In the Linux kernel, the following vulnerability has been resolved:
posix-cpu-timers: Prevent UAF caused by non-leader exec() race
Wongi and Jungwoo decoded and reported a non-leader exec() related race
which can result in an UAF:
sys_timer_delete() exec()
posix_cpu_timer_del()
// Observes old leader
p = pid_task(pid, pid_type); de_thread()
switch_leader();
release_task(old_leader)
__exit_signal(old_leader)
sighand = lock(old_leader, sighand);
posix_cpu_timers*_exit();
sighand = lock_task_sighand(p) unhash_task(old_leader);
sh = lock(p, sighand) old_leader->sighand = NULL;
unlock(sighand);
(p->sighand == NULL)
unlock(sh)
return NULL;
// Returns without action
if(!sighand)
return 0;
free_posix_timer();
This is "harmless" unless the deleted timer was armed and enqueued in
p->signal because on exec() a TGID targeted timer is inherited.
As sys_timer_delete() freed the underlying posix timer object
run_posix_cpu_timers() or any timerqueue related add/delete operations on
other timers will access the freed object's timerqueue node, which results
in an UAF.
There is a similar problem vs. posix_cpu_timer_set(). For regular posix
timers it just transiently returns -ESRCH to user space, but for the use
case in do_cpu_nanosleep() it's the same UAF just that the k_itimer is
allocated on the stack.
Also posix_cpu_timer_rearm() fails to rearm the timer, which means it stops
to expire.
While debating solutions Frederic pointed out another problem:
posix_cpu_timer_del(tmr)
__exit_signal(p)
posix_cpu_timers*_exit(p);
unhash_task(p);
p->sighand = NULL;
sh = lock_task_sighand(p)
sighand = p->sighand;
if (!sighand)
return NULL;
lock(sighand);
if (!sh)
WARN_ON_ONCE(timer_queued(tmr));
On weakly ordered architectures it is not guaranteed that
posix_cpu_timer_del() will observe the stores in posix_cpu_timers*_exit()
when p->sighand is observed as NULL, which means the WARN() can be a false
positive.
Solve these issues by:
1) Changing the store in __exit_signal() to smp_store_release().
2) Adding a smp_acquire__after_ctrl_dep() into the !sighand path
of lock_task_sighand().
3) Creating a helper function for looking up the task and locking sighand
which does not return when sighand == NULL. Instead it retries the
task lookup and only if that fails it gives up.
4) Using that helper in the three affected functions.
#1/#2 ensures that the reader side which observes sighand == NULL also
observes all preceeding stores, i.e. the stores in posix_cpu_timers*_exit()
and the ones in unhash_task().
#3 ensures that the above described non-leader exec() situation is handled
gracefully. When the task lookup returns the old leader, but sighand ==
NULL then it retries. In the non-leader exec() case the subsequent task
lookup will observe the new leader due to #1/#2. In normal exit() scenarios
the subsequent lookup fails.
When the task lookup fails, the function also checks whether the timer is
still enqueued and issues a warning if that's the case. Unfortunately there
is nothing which can be done about it, but as the task is already not
longer visible the timer should not be accessed anymore. This check also
requires memory ordering, which is not provided when the first lookup
fails. To achieve that the check is preceeded by a smp_rmb() which pairs
with the smp_wmb() in write_seqlock() in __exit_signal(). That ensures that
the stores in posix_cpu_timers*_exit() are visible.
The history of the non-leader exec() issue goes back to the early days of
posix CPU timers, which stored a pointer to the group leader task in the
timer. That obviously fails when a non-leader exec() switches the leader.
commit e0a70217107e ("posix-cpu-timers: workaround to suppress the problems
with mt exec") added a temporary workaround for that in 2010 which surv
---truncated---
Severity
7.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < 67aa823e3e8c229c6d374df79c804f6721cb83b6
(git)
Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < d8bcb28abad857f1415da7656f19b2ada90af04f (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < cc35ddbc497311e0b6b9a6a6a4f4d1217d6ab1aa (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < 12a891c773aeb5823d63dbd0cb2ab931d6c21c9b (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < e74443f5db0037c556ef436fa64b88bf4ea08f83 (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < 6a7ecc25abe6f0fecc6e62a05096987200edbd02 (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < ad1cafa1bdaa71da85d71cac053838bbe97852b6 (git) Affected: 55e8c8eb2c7b6bf30e99423ccfe7ca032f498f59 , < 920f893f735e92ba3a1cd9256899a186b161928d (git) |
|
| Linux | Linux |
Affected:
5.7
Unaffected: 0 , < 5.7 (semver) Unaffected: 5.10.262 , ≤ 5.10.* (semver) Unaffected: 5.15.213 , ≤ 5.15.* (semver) Unaffected: 6.1.180 , ≤ 6.1.* (semver) Unaffected: 6.6.147 , ≤ 6.6.* (semver) Unaffected: 6.12.100 , ≤ 6.12.* (semver) Unaffected: 6.18.41 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix) |
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CVE-2026-64559 (GCVE-0-2026-64559)
Vulnerability from cvelistv5 – Published: 2026-07-29 16:31 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
s390/pkey: Check length in PKEY_VERIFYPROTK ioctl
Summary
In the Linux kernel, the following vulnerability has been resolved:
s390/pkey: Check length in PKEY_VERIFYPROTK ioctl
Explicitly check the buffer length request structure provided by
user-space and fail, if it exceeds the buffer size.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 0a9e34ccbe772b8f321388cdbdf4f22b94e513e7
(git)
Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 693bf91d4db134f9b1c2840c8e287eee3d993bac (git) Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 7e7e03848c918aa0acad5ffd75d929e3afec1554 (git) Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < b3d4ab2d7df9426f7f1d3671d7e2108f2ca6e970 (git) |
|
| Linux | Linux |
Affected:
6.12
Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-64558 (GCVE-0-2026-64558)
Vulnerability from cvelistv5 – Published: 2026-07-29 16:31 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
s390/pkey: Check length in pkey_pckmo handler implementation
Summary
In the Linux kernel, the following vulnerability has been resolved:
s390/pkey: Check length in pkey_pckmo handler implementation
Explicitly check the length of the target buffer in the pkey_pckmo
implementation of the key_to_protkey() handler function. The handler
function fails, if the generated output data exceeds the length of the
provided target buffer.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 02028a24e26d85262ab9c8fc4344e1f3503007fc
(git)
Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 433e5e70cdc1edf382d28d08a885b22e2b98b7da (git) Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 614aa0491c7a190556c2345dddee0b6f5ed90989 (git) Affected: 8fcc231ce3bea12b78bb94b280cdc03cff342435 , < 1ac287e2af9a9112fe271427ef45eceb26bce8b4 (git) |
|
| Linux | Linux |
Affected:
6.12
Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix) |
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CVE-2026-64557 (GCVE-0-2026-64557)
Vulnerability from cvelistv5 – Published: 2026-07-29 08:01 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_new_connection_cb()
Summary
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_new_connection_cb()
l2cap_sock_new_connection_cb() returned l2cap_pi(sk)->chan after
release_sock(parent). Once the parent lock is dropped the newly
enqueued child socket sk is reachable via the accept queue, so another
task can accept and free it before the callback dereferences sk,
resulting in a use-after-free.
Rework the ->new_connection() op so the core, rather than the callback,
owns the child channel's lifetime. The op now receives a pre-allocated
new_chan and returns an errno instead of allocating and returning a
channel. l2cap_new_connection() allocates the child channel and links
it into the conn list via __l2cap_chan_add() before invoking the
callback, so the conn-list reference keeps the channel alive once
release_sock(parent) exposes the socket to other tasks.
Channel configuration that was duplicated in l2cap_sock_init() and the
various new_connection callbacks is consolidated into
l2cap_chan_set_defaults(), which now inherits from the parent channel
when one is supplied.
Severity
8.8 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
8ffb929098a56939ac71509302eeab5b207bf262 , < b39298044e5534612511a2ff5de03ba5f6e7a820
(git)
Affected: 8ffb929098a56939ac71509302eeab5b207bf262 , < 8c37e4338c801ebb8cee52436c01c41e009f6e87 (git) Affected: 8ffb929098a56939ac71509302eeab5b207bf262 , < 84e718b6a814edc84159361f9f454a4e92ae91ae (git) Affected: 8ffb929098a56939ac71509302eeab5b207bf262 , < 36da806f7fbaee56ad9e81859deec203f9728700 (git) Affected: 8ffb929098a56939ac71509302eeab5b207bf262 , < 733e76e74e406c1d1ddc7369420dd8a47f48bb8a (git) Affected: 8ffb929098a56939ac71509302eeab5b207bf262 , < 6fef032af0092ed5ccb767239a9ac1bc38c08a40 (git) |
|
| Linux | Linux |
Affected:
3.13
Unaffected: 0 , < 3.13 (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix) |
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CVE-2026-64556 (GCVE-0-2026-64556)
Vulnerability from cvelistv5 – Published: 2026-07-29 08:01 – Updated: 2026-07-30 06:06
VLAI
EPSS
VEX
Title
perf/core: Detach event groups during remove_on_exec
Summary
In the Linux kernel, the following vulnerability has been resolved:
perf/core: Detach event groups during remove_on_exec
perf_event_remove_on_exec() removes events by calling
perf_event_exit_event(). For top-level events, this removes the event from
the context with DETACH_EXIT only.
This can leave inconsistent group state when a removed event is a group
leader and the group contains siblings without remove_on_exec. If the group
was active, the surviving siblings can remain active and attached to the
removed leader's sibling list, but are no longer represented by a valid
group leader on the PMU context active lists.
A later close of the removed leader uses DETACH_GROUP and can promote the
still-active siblings from this stale group state. The next schedule-in can
then add an already-linked active_list entry again, corrupting the PMU
context active list.
With DEBUG_LIST enabled, this is caught as a list_add double-add in
merge_sched_in().
Fix this by detaching group relationships when remove_on_exec removes an
event. This preserves the existing task-exit and revoke behavior, while
ensuring surviving siblings are ungrouped before the removed event leaves
the context.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
2e498d0a74e5b88a6689ae1b811f247f91ff188e , < 4cdb1b3ab96eb1b7eb70bc5c82fede334bd60df2
(git)
Affected: 2e498d0a74e5b88a6689ae1b811f247f91ff188e , < 39358e856fb89e62e3c8d7389a2dc4ec33dbe90e (git) Affected: 2e498d0a74e5b88a6689ae1b811f247f91ff188e , < a2d5d3ee7b6e3953114726b1521e62123ab5b043 (git) Affected: 2e498d0a74e5b88a6689ae1b811f247f91ff188e , < 06ccef0434e98058ddae7bcebc901f93d22b7653 (git) Affected: 2e498d0a74e5b88a6689ae1b811f247f91ff188e , < 037a3c43edfb597665dd34457cd22b14692f2ba3 (git) |
|
| Linux | Linux |
Affected:
5.13
Unaffected: 0 , < 5.13 (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc2 , ≤ * (original_commit_for_fix) |
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