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ALSA-2026:89082
Vulnerability from osv_almalinux – Published: 2026-10-24 00:00 – Updated: 2026-10-26 14:53 – Source website
VLAI
Summary
Important: kernel-rt security, bug fix, and enhancement update
Details
The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.
Security Fix(es):
- kernel: tcp: restrict SO_ATTACH_FILTER to priv users (CVE-2026-53236)
- kernel: fuse: re-lock request before replacing page cache folio (CVE-2026-53388)
- kernel: writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs() (CVE-2026-64378)
- kernel: net: gro: fix double aggregation of flush-marked skbs (CVE-2026-68136)
- kernel: net/packet: avoid fanout hook re-registration after unregister (CVE-2026-68338)
- kernel: net/iucv: fix use-after-free of a severed iucv_path (CVE-2026-68140)
- kernel: net/sched: serialize qdisc_rtab_list against concurrent get/put (CVE-2026-68138)
- kernel: ipvs: reload ip header after head reallocation (CVE-2026-68476)
- kernel: selinux: avoid sk_socket dereference in selinux_sctp_bind_connect() (CVE-2026-72242)
- kernel: mptcp: options: reset DSS fields in case of unexpected size (CVE-2026-80586)
- kernel: usb: usbfs: fix use-after-free of usb_device in usbdev_release() (CVE-2026-80824)
- kernel: smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions (CVE-2026-89638)
- kernel: net/iucv: filter frames in afiucv_hs_rcv() by ingress device (CVE-2026-81003)
- kernel: ipv4: validate checksum_start before completing checksum (CVE-2026-99999)
Bug Fix(es) and Enhancement(s):
- Backport 6785011f8b16 ("ipv4: validate checksum_start before completing checksum") [almalinux-8.10.z] (JIRA:AlmaLinux-280584)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
{
"affected": [
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "kernel-rt"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.18.0-553.178.1.rt7.519.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "kernel-rt-core"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.18.0-553.178.1.rt7.519.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "kernel-rt-debug"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.18.0-553.178.1.rt7.519.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "kernel-rt-debug-core"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.18.0-553.178.1.rt7.519.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "kernel-rt-debug-devel"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.18.0-553.178.1.rt7.519.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "kernel-rt-debug-modules"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.18.0-553.178.1.rt7.519.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "kernel-rt-debug-modules-extra"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.18.0-553.178.1.rt7.519.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "kernel-rt-devel"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.18.0-553.178.1.rt7.519.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "kernel-rt-modules"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.18.0-553.178.1.rt7.519.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:8",
"name": "kernel-rt-modules-extra"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.18.0-553.178.1.rt7.519.el8_10"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"details": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. \n\nSecurity Fix(es): \n\n * kernel: tcp: restrict SO_ATTACH_FILTER to priv users (CVE-2026-53236)\n * kernel: fuse: re-lock request before replacing page cache folio (CVE-2026-53388)\n * kernel: writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs() (CVE-2026-64378)\n * kernel: net: gro: fix double aggregation of flush-marked skbs (CVE-2026-68136)\n * kernel: net/packet: avoid fanout hook re-registration after unregister (CVE-2026-68338)\n * kernel: net/iucv: fix use-after-free of a severed iucv_path (CVE-2026-68140)\n * kernel: net/sched: serialize qdisc_rtab_list against concurrent get/put (CVE-2026-68138)\n * kernel: ipvs: reload ip header after head reallocation (CVE-2026-68476)\n * kernel: selinux: avoid sk_socket dereference in selinux_sctp_bind_connect() (CVE-2026-72242)\n * kernel: mptcp: options: reset DSS fields in case of unexpected size (CVE-2026-80586)\n * kernel: usb: usbfs: fix use-after-free of usb_device in usbdev_release() (CVE-2026-80824)\n * kernel: smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions (CVE-2026-89638)\n * kernel: net/iucv: filter frames in afiucv_hs_rcv() by ingress device (CVE-2026-81003)\n * kernel: ipv4: validate checksum_start before completing checksum (CVE-2026-99999)\n\n\nBug Fix(es) and Enhancement(s): \n\n * Backport 6785011f8b16 (\"ipv4: validate checksum_start before completing checksum\") [almalinux-8.10.z] (JIRA:AlmaLinux-280584)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
"id": "ALSA-2026:89082",
"modified": "2026-10-26T14:53:39Z",
"published": "2026-10-24T00:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2026:89082"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-53236"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-53388"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-64378"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-68136"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-68138"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-68140"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-68338"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-68476"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-72242"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-80586"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-80824"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-81003"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-89638"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-99999"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2492709"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2502255"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2507296"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2513163"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2513264"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2513293"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2513343"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2516417"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2524438"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2528642"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2532122"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2532515"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2553429"
},
{
"type": "ADVISORY",
"url": "https://errata.almalinux.org/8/ALSA-2026-89082.html"
}
],
"related": [
"CVE-2026-53236",
"CVE-2026-53388",
"CVE-2026-64378",
"CVE-2026-68136",
"CVE-2026-68338",
"CVE-2026-68140",
"CVE-2026-68138",
"CVE-2026-68476",
"CVE-2026-72242",
"CVE-2026-80586",
"CVE-2026-80824",
"CVE-2026-89638",
"CVE-2026-81003",
"CVE-2026-99999"
],
"summary": "Important: kernel-rt security, bug fix, and enhancement update"
}
CVE-2026-53236 (GCVE-0-2026-53236)
Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-10-15 01:22
VLAI
EPSS
VEX
Title
tcp: restrict SO_ATTACH_FILTER to priv users
Summary
In the Linux kernel, the following vulnerability has been resolved:
tcp: restrict SO_ATTACH_FILTER to priv users
This patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets
to users with CAP_NET_ADMIN capability.
This blocks potential side-channel attack where an unprivileged application
attaches a filter to leak TCP sequence/acknowledgment numbers.
Severity
No CVSS data available.
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/3747de241a66ef2c7… | |
| https://git.kernel.org/stable/c/ecfe9171b26ae3eed… | |
| https://git.kernel.org/stable/c/82b3e7ce10c53fc12… | |
| https://git.kernel.org/stable/c/ede69b8f6670600e5… | |
| https://git.kernel.org/stable/c/c68517a3e18e20997… | |
| https://git.kernel.org/stable/c/5d39580f68e6ddeed… | |
| https://cert-portal.siemens.com/productcert/html/… | |
| https://cert-portal.siemens.com/productcert/html/… | |
| https://cert-portal.siemens.com/productcert/html/… |
Impacted products
9 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3747de241a66ef2c7032d2cc2b826a47c5fa0f6a
(git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 82b3e7ce10c53fc12aab8904745603efc74f8c07 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ede69b8f6670600e534591664584f810d7c385f9 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < c68517a3e18e20997808821c5559d0cba4d776c1 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5d39580f68e6ddeedd15e587282207489dfb3da2 (git) |
|
| Linux | Linux |
Affected:
2.6.12
Unaffected: 0 , < 2.6.12 (semver) Unaffected: 6.1.176 , ≤ 6.1.* (semver) Unaffected: 6.6.143 , ≤ 6.6.* (semver) Unaffected: 6.12.94 , ≤ 6.12.* (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.7 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.7 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem |
Affected:
0 , < *
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.6 , < *
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.7 , < *
(custom)
|
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],
"providerMetadata": {
"dateUpdated": "2026-10-15T01:22:53.447Z",
"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"shortName": "siemens-SADP"
},
"references": [
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
},
{
"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
}
],
"x_adpType": "supplier"
}
],
"cna": {
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{
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"product": "Linux",
"programFiles": [
"net/core/sock.c"
],
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"versions": [
{
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"versionType": "git"
},
{
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},
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"programFiles": [
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],
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"vendor": "Linux",
"versions": [
{
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"version": "2.6.12"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.94",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.18.36",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "7.0.13",
"versionType": "semver"
},
{
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"version": "7.1",
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}
]
}
],
"cpeApplicability": [
{
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"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.143",
"versionStartIncluding": "2.6.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.94",
"versionStartIncluding": "2.6.12",
"vulnerable": true
},
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CVE-2026-53388 (GCVE-0-2026-53388)
Vulnerability from cvelistv5 – Published: 2026-07-19 11:59 – Updated: 2026-10-19 20:07
VLAI
EPSS
VEX
Title
fuse: re-lock request before replacing page cache folio
Summary
In the Linux kernel, the following vulnerability has been resolved:
fuse: re-lock request before replacing page cache folio
fuse_try_move_folio() unlocks the request on entry but does not
re-lock it on the success path. This means fuse_chan_abort() can end the
request and free the fuse_io_args (eg fuse_readpages_end()) while the
subsequent copy chain logic after fuse_try_move_folio() accesses the
fuse_io_args, leading to use-after-free issues.
Fix this by calling lock_request() before replace_page_cache_folio().
This ensures the request is locked on the success path which will
prevent the fuse_io_args from being freed while the later copying logic
runs, and also ensures that the ap->folios[i]->mapping is never null
since ap->folios[i] will always point to the newfolio after
replace_page_cache_folio().
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:30 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/7c18691e0cfda2967… | |
| https://git.kernel.org/stable/c/5927b43a4f8d89e86… | |
| https://git.kernel.org/stable/c/030fe3e9d8abdee30… | |
| https://git.kernel.org/stable/c/46473ddccdc506503… | |
| https://git.kernel.org/stable/c/af2892249d982a1c0… | |
| https://git.kernel.org/stable/c/0223f452532d9cd8a… | |
| https://git.kernel.org/stable/c/e28db6ac4792d065a… | |
| https://git.kernel.org/stable/c/a078484921052d0ba… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 7c18691e0cfda29672f79bafde8abdb7710674f6
(git)
Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 5927b43a4f8d89e86930f524bf63e9c7e66f61b4 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 030fe3e9d8abdee303dd7e9e42f45082d382a407 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 46473ddccdc5065033e397d6e62c280dbcd3d9c2 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < af2892249d982a1c036ca456cc135374e68b6677 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < 0223f452532d9cd8a5e87c45de828fd93c99bd25 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < e28db6ac4792d065ab32565fd9f0a2361c3d4666 (git) Affected: ce534fb052928ce556639d7ecf01cbf4e01321e1 , < a078484921052d0badd827fcc2770b5cfc1d4120 (git) |
|
| Linux | Linux |
Affected:
2.6.35
Unaffected: 0 , < 2.6.35 (semver) Unaffected: 5.15.211 , ≤ 5.15.* (semver) Unaffected: 6.1.177 , ≤ 6.1.* (semver) Unaffected: 6.6.144 , ≤ 6.6.* (semver) Unaffected: 6.12.95 , ≤ 6.12.* (semver) Unaffected: 6.18.37 , ≤ 6.18.* (semver) Unaffected: 7.0.14 , ≤ 7.0.* (semver) Unaffected: 7.1.2 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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CVE-2026-64378 (GCVE-0-2026-64378)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-10-19 20:38
VLAI
EPSS
VEX
Title
writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs()
Summary
In the Linux kernel, the following vulnerability has been resolved:
writeback: fix race between cgroup_writeback_umount() and inode_switch_wbs()
When a container exits, the following BUG_ON() is occasionally triggered:
==================================================================
VFS: Busy inodes after unmount of sdb (ext4)
------------[ cut here ]------------
kernel BUG at fs/super.c:695!
CPU: 3 PID: 6 Comm: containerd-shim Tainted: G OE K 6.6 #1
pstate: 63400009 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : generic_shutdown_super+0xf0/0x100
lr : generic_shutdown_super+0xf0/0x100
Call trace:
generic_shutdown_super+0xf0/0x100
kill_block_super+0x20/0x48
ext4_kill_sb+0x28/0x60
deactivate_locked_super+0x54/0x130
deactivate_super+0x84/0xa0
cleanup_mnt+0xa4/0x140
__cleanup_mnt+0x18/0x28
task_work_run+0x78/0xe0
do_notify_resume+0x204/0x240
==================================================================
The root cause is a race between cgroup_writeback_umount() and
inode_switch_wbs()/cleanup_offline_cgwb(). There is a window between
inode_prepare_wbs_switch() returning true and the subsequent
wb_queue_isw() call. Following is the process that triggers the issue:
CPU A (umount) | CPU B (writeback)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
inode_switch_wbs/cleanup_offline_cgwb
atomic_inc(&isw_nr_in_flight)
inode_prepare_wbs_switch
-> passes SB_ACTIVE check
__iget(inode)
generic_shutdown_super
sb->s_flags &= ~SB_ACTIVE
cgroup_writeback_umount(sb)
smp_mb()
atomic_read(&isw_nr_in_flight)
rcu_barrier()
-> no pending RCU callbacks
flush_workqueue(isw_wq)
-> nothing queued, returns
evict_inodes(sb)
-> Inode skipped as isw still holds a ref.
sop->put_super(sb)
/* destroys percpu counters */
-> VFS: Busy inodes after unmount!
wb_queue_isw()
queue_work(isw_wq, ...)
/* later in work function */
inode_switch_wbs_work_fn
process_inode_switch_wbs
iput() -> evict
percpu_counter_dec() // UAF!
Fix this by extending the RCU read-side critical section in
inode_switch_wbs() and cleanup_offline_cgwb() to cover from
inode_prepare_wbs_switch() through wb_queue_isw(). Since there is
no sleep in this window, rcu_read_lock() can be used. Then add a
synchronize_rcu() in cgroup_writeback_umount() before the existing
rcu_barrier(), so that all in-flight switchers that have passed the
SB_ACTIVE check have completed queue_work() before flush_workqueue()
is called.
The existing rcu_barrier() is intentionally retained so this fix can
be backported unchanged to stable kernels (5.10.y, 6.6.y, ...) that
still queue switches via queue_rcu_work(). It is a no-op on current
mainline (since commit e1b849cfa6b6 ("writeback: Avoid contention on
wb->list_lock when switching inodes")) and is removed in a follow-up
patch.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:39 UTC
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/087d5b8b501c570f8… | |
| https://git.kernel.org/stable/c/3c9c9648f77e4d14e… | |
| https://git.kernel.org/stable/c/5c3265f3252b2ee50… | |
| https://git.kernel.org/stable/c/c923cc3cb5cd8945c… | |
| https://git.kernel.org/stable/c/685fc15a410885b6d… | |
| https://git.kernel.org/stable/c/53eeaf4d63068dbc7… | |
| https://git.kernel.org/stable/c/cba38ec4cbd3a7b8b… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
a1a0e23e49037c23ea84bc8cc146a03584d13577 , < 087d5b8b501c570f84bf655164e6698c3ce146e0
(git)
Affected: a1a0e23e49037c23ea84bc8cc146a03584d13577 , < 3c9c9648f77e4d14e50676bc51c2174ba9c8d361 (git) Affected: a1a0e23e49037c23ea84bc8cc146a03584d13577 , < 5c3265f3252b2ee50707adaaa3f9bd0df3df72de (git) Affected: a1a0e23e49037c23ea84bc8cc146a03584d13577 , < c923cc3cb5cd8945ceaf08252754110643446593 (git) Affected: a1a0e23e49037c23ea84bc8cc146a03584d13577 , < 685fc15a410885b6d4dee64de0dce721b9428b12 (git) Affected: a1a0e23e49037c23ea84bc8cc146a03584d13577 , < 53eeaf4d63068dbc7708b0c7adb20151c812feca (git) Affected: a1a0e23e49037c23ea84bc8cc146a03584d13577 , < cba38ec4cbd3a7b8b942a8d52531a05be8a9ff0d (git) Affected: c5cbbec54fe71c4de2d34f8c0ec8fbfdd7f17339 (git) Affected: 4.4.5 , < 4.5 (semver) |
|
| Linux | Linux |
Affected:
4.5
Unaffected: 0 , < 4.5 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (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 , ≤ * (original_commit_for_fix) |
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CVE-2026-68136 (GCVE-0-2026-68136)
Vulnerability from cvelistv5 – Published: 2026-08-10 11:58 – Updated: 2026-10-19 20:58
VLAI
EPSS
VEX
Title
net: gro: fix double aggregation of flush-marked skbs
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: gro: fix double aggregation of flush-marked skbs
Commit 0ab03f353d36 ("net-gro: Fix GRO flush when receiving a GSO
packet.") added a flush check to skb_gro_receive(), but
skb_gro_receive_list() lacks the same validation.
As a result, packets marked with NAPI_GRO_CB(skb)->flush may still be
re-aggregated.
This allows already-GRO'd packets with existing frag_list to be
re-aggregated into a new GRO session, corrupting the frag_list chain
structure. When skb_segment() attempts to unpack these malformed packets,
it encounters invalid state and triggers a kernel panic.
Scenario (Tethering/Device forwarding):
1. Driver: Generated aggregated packet P1 via LRO with frag_list
2. Dev A: Receives aggregated fraglist packet and flush flag set
3. Dev A: Re-enters GRO, skb_gro_receive_list() is called
4. Missing flush check allows re-aggregation despite flush flag
5. Frag_list chain becomes corrupted (loops or dangling refs)
6. Dev B: TX path calls skb_segment(), crashes on corrupted frag_list
Root cause in skb_segment():
The check at line ~4891:
if (hsize <= 0 && i >= nfrags && skb_headlen(list_skb) &&
(skb_headlen(list_skb) == len || sg)) {
When frag_list is corrupted by double aggregation, when list_skb is
a NULL pointer from skb->next, skb_headlen(list_skb) dereference
NULL/corrupted pointers occurs.
Call Trace:
skb_headlen(NULL skb)
skb_segment
tcp_gso_segment
tcp4_gso_segment
inet_gso_segment
skb_mac_gso_segment
__skb_gso_segment
skb_gso_segment
validate_xmit_skb
validate_xmit_skb_list
sch_direct_xmit
qdisc_restart
__qdisc_run
qdisc_run
net_tx_action
Fix: Add NAPI_GRO_CB(skb)->flush validation to the early-return check in
skb_gro_receive_list(), matching the defensive programming pattern of
skb_gro_receive().
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:44 UTC
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/7fc7e35212cf58c13… | |
| https://git.kernel.org/stable/c/d1fb23f8f794ac468… | |
| https://git.kernel.org/stable/c/db3e82da616f52e2b… | |
| https://git.kernel.org/stable/c/107e1a469f53a2a70… | |
| https://git.kernel.org/stable/c/a4dfd46cc8f08a29c… | |
| https://git.kernel.org/stable/c/fc0c0f7a207f0cd2d… | |
| https://git.kernel.org/stable/c/e751256486d0ded20… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
3a1296a38d0cf62bffb9a03c585cbd5dbf15d596 , < 7fc7e35212cf58c134310fb47566a844297ceae9
(git)
Affected: 3a1296a38d0cf62bffb9a03c585cbd5dbf15d596 , < d1fb23f8f794ac4683127bd49a6422bd87e0ac02 (git) Affected: 3a1296a38d0cf62bffb9a03c585cbd5dbf15d596 , < db3e82da616f52e2b27e25e7be3fde2f2a5e54d6 (git) Affected: 3a1296a38d0cf62bffb9a03c585cbd5dbf15d596 , < 107e1a469f53a2a70874f3f12bf6fcd23925da1d (git) Affected: 3a1296a38d0cf62bffb9a03c585cbd5dbf15d596 , < a4dfd46cc8f08a29c6183794790547d0945f3d45 (git) Affected: 3a1296a38d0cf62bffb9a03c585cbd5dbf15d596 , < fc0c0f7a207f0cd2d2aa725696c907f7d03af9e0 (git) Affected: 3a1296a38d0cf62bffb9a03c585cbd5dbf15d596 , < e751256486d0ded20f5a9f9863467f1dce65142f (git) |
|
| Linux | Linux |
Affected:
5.6
Unaffected: 0 , < 5.6 (semver) Unaffected: 5.10.266 , ≤ 5.10.* (semver) Unaffected: 6.1.184 , ≤ 6.1.* (semver) Unaffected: 6.6.153 , ≤ 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 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gro: fix double aggregation of flush-marked skbs\n\nCommit 0ab03f353d36 (\"net-gro: Fix GRO flush when receiving a GSO\npacket.\") added a flush check to skb_gro_receive(), but\nskb_gro_receive_list() lacks the same validation.\n\nAs a result, packets marked with NAPI_GRO_CB(skb)-\u003eflush may still be\nre-aggregated.\n\nThis allows already-GRO\u0027d packets with existing frag_list to be\nre-aggregated into a new GRO session, corrupting the frag_list chain\nstructure. When skb_segment() attempts to unpack these malformed packets,\nit encounters invalid state and triggers a kernel panic.\n\nScenario (Tethering/Device forwarding):\n 1. Driver: Generated aggregated packet P1 via LRO with frag_list\n 2. Dev A: Receives aggregated fraglist packet and flush flag set\n 3. Dev A: Re-enters GRO, skb_gro_receive_list() is called\n 4. Missing flush check allows re-aggregation despite flush flag\n 5. Frag_list chain becomes corrupted (loops or dangling refs)\n 6. Dev B: TX path calls skb_segment(), crashes on corrupted frag_list\n\nRoot cause in skb_segment():\n The check at line ~4891:\n if (hsize \u003c= 0 \u0026\u0026 i \u003e= nfrags \u0026\u0026 skb_headlen(list_skb) \u0026\u0026\n (skb_headlen(list_skb) == len || sg)) {\n\n When frag_list is corrupted by double aggregation, when list_skb is\n a NULL pointer from skb-\u003enext, skb_headlen(list_skb) dereference\n NULL/corrupted pointers occurs.\n\nCall Trace:\n skb_headlen(NULL skb)\n skb_segment\n tcp_gso_segment\n tcp4_gso_segment\n inet_gso_segment\n skb_mac_gso_segment\n __skb_gso_segment\n skb_gso_segment\n validate_xmit_skb\n validate_xmit_skb_list\n sch_direct_xmit\n qdisc_restart\n __qdisc_run\n qdisc_run\n net_tx_action\n\nFix: Add NAPI_GRO_CB(skb)-\u003eflush validation to the early-return check in\nskb_gro_receive_list(), matching the defensive programming pattern of\nskb_gro_receive()."
}
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"value": "AV:N - The bug is reached from the standard NAPI GRO receive path processing remotely originated TCP/IP packets (napi_gro_receive\u2192dev_gro_receive\u2192tcp_gro_receive\u2192skb_gro_receive_list), including tethering/NAT/forwarding scenarios where packets re-enter GRO on a second netdev after driver LRO or prior GRO aggregation.\nAC:L - An attacker can reliably trigger the bug by crafting a TCP stream through a forwarding host with rx-gro-list enabled, without races or victim-specific timing; the commit documents a deterministic tethering/forwarding repro where flush-marked frag_list skbs are re-aggregated and later crash skb_segment.\nPR:N - No local privileges or authentication are required; any remote peer that can send TCP traffic through a vulnerable forwarding/tethering/NAT Linux host can reach the GRO fraglist merge path, which performs no capability or credential checks on the receive path.\nUI:N - Exploitation requires only network-delivered packets and normal kernel forwarding/GRO processing; the victim does not need to open files, mount filesystems, click links, or perform any deliberate action beyond routine network operation.\nS:U - Impact is confined to kernel memory corruption and panic within the same host kernel security domain during packet GRO aggregation and subsequent segmentation on transmit; it does not cross VM, container, or IOMMU boundaries to affect a separate security authority.\nC:H - Double aggregation corrupts the skb frag_list chain (loops, dangling references, NULL/corrupted list_skb pointers), constituting kernel heap memory corruption that can be read during skb_segment processing and is classifiable as a high-impact info-disclosure primitive beyond a simple crash.\nI:H - Re-aggregating flush-marked skbs with existing frag_list corrupts skb linked-list structure and reference relationships in kernel memory, enabling potential control of subsequent skb metadata and write/control-flow primitives during GSO segmentation, not merely integrity-preserving packet drops.\nA:H - Corrupted frag_list state causes skb_segment to dereference a NULL or invalid list_skb via skb_headlen(), producing a kernel panic/oops on the transmit path (sch_direct_xmit/qdisc_run), fully denying availability of the affected system."
}
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"title": "net: gro: fix double aggregation of flush-marked skbs",
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"cveId": "CVE-2026-68136",
"datePublished": "2026-08-10T11:58:59.450Z",
"dateReserved": "2026-07-30T09:28:09.370Z",
"dateUpdated": "2026-10-19T20:58:52.839Z",
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CVE-2026-68138 (GCVE-0-2026-68138)
Vulnerability from cvelistv5 – Published: 2026-08-10 11:59 – Updated: 2026-10-19 20:58
VLAI
EPSS
VEX
Title
net/sched: serialize qdisc_rtab_list against concurrent get/put
Summary
In the Linux kernel, the following vulnerability has been resolved:
net/sched: serialize qdisc_rtab_list against concurrent get/put
qdisc_get_rtab() and qdisc_put_rtab() mutate the process-global singly
linked list qdisc_rtab_list and a plain non-atomic 'int refcnt' with no
lock. This was only safe because every caller historically held the RTNL
mutex, which serialized all rate-table lookups, inserts and frees.
That invariant no longer holds. cls_flower sets
TCF_PROTO_OPS_DOIT_UNLOCKED, so tc_new_tfilter() keeps rtnl_held == false
for it and sets TCA_ACT_FLAGS_NO_RTNL. That flag propagates through
tcf_exts_validate_ex() -> tcf_action_init() -> tcf_action_init_1() ->
tcf_police_init(), which calls qdisc_get_rtab()/qdisc_put_rtab() with the
RTNL mutex NOT held. Two RTM_NEWTFILTER requests on different CPUs, each
adding a flower filter with a police action carrying the same rate, then
race on qdisc_rtab_list and on the non-atomic refcnt, leading to a
use-after-free / double-free of the kmalloc-2k struct qdisc_rate_table.
qdisc_rtab_list is a single global (not per-netns), so the corrupted
object is shared system-wide.
BUG: KASAN: slab-use-after-free in qdisc_put_rtab+0x12f/0x160
qdisc_put_rtab+0x12f/0x160
tcf_police_init+0xda9/0x1590
tcf_action_init_1+0x460/0x6b0
tcf_action_init+0x439/0xa40
tcf_exts_validate_ex+0x42d/0x550
fl_change+0xddd/0x7da0
tc_new_tfilter+0xaa7/0x2420
rtnetlink_rcv_msg+0x95e/0xe90
which belongs to the cache kmalloc-2k of size 2048
Protect qdisc_rtab_list and the refcount with a dedicated spinlock. The
(sleeping, GFP_KERNEL) allocation in qdisc_get_rtab() is performed before
taking the lock; if a concurrent inserter added an identical table in the
meantime the freshly allocated one is freed under the lock, so no
duplicate is leaked. qdisc_put_rtab() now decrements the refcount and
unlinks under the same lock.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:44 UTC
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/1b050d09dd1a0ddae… | |
| https://git.kernel.org/stable/c/6e0241f6cbb149d92… | |
| https://git.kernel.org/stable/c/f93c89392bd3b180b… | |
| https://git.kernel.org/stable/c/4131dd0b6f67acddd… | |
| https://git.kernel.org/stable/c/d981098b76756ed71… | |
| https://git.kernel.org/stable/c/8ddc2eb0d2da9c83f… | |
| https://git.kernel.org/stable/c/fb29e1b41052488ee… | |
| https://git.kernel.org/stable/c/f43ee0c0730d61916… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
470502de5bdb1ed0def643a4458593a40b8f6b66 , < 1b050d09dd1a0ddae83bf012cf4956b7a960235f
(git)
Affected: 470502de5bdb1ed0def643a4458593a40b8f6b66 , < 6e0241f6cbb149d926ee8efee2c734fea71452cf (git) Affected: 470502de5bdb1ed0def643a4458593a40b8f6b66 , < f93c89392bd3b180b5b7abc6fdae8e3dd667a313 (git) Affected: 470502de5bdb1ed0def643a4458593a40b8f6b66 , < 4131dd0b6f67acddd616ed7c244e1d3eedd46e7b (git) Affected: 470502de5bdb1ed0def643a4458593a40b8f6b66 , < d981098b76756ed71666a27518eeb69883657c43 (git) Affected: 470502de5bdb1ed0def643a4458593a40b8f6b66 , < 8ddc2eb0d2da9c83f54f1e5720525b461b8480c4 (git) Affected: 470502de5bdb1ed0def643a4458593a40b8f6b66 , < fb29e1b41052488ee3f2d115d4a870497ebd7f7d (git) Affected: 470502de5bdb1ed0def643a4458593a40b8f6b66 , < f43ee0c0730d6191629b5ee1ceae27b1ebfdc047 (git) |
|
| Linux | Linux |
Affected:
5.1
Unaffected: 0 , < 5.1 (semver) Unaffected: 5.10.266 , ≤ 5.10.* (semver) Unaffected: 5.15.217 , ≤ 5.15.* (semver) Unaffected: 6.1.184 , ≤ 6.1.* (semver) Unaffected: 6.6.153 , ≤ 6.6.* (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.46 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: serialize qdisc_rtab_list against concurrent get/put\n\nqdisc_get_rtab() and qdisc_put_rtab() mutate the process-global singly\nlinked list qdisc_rtab_list and a plain non-atomic \u0027int refcnt\u0027 with no\nlock. This was only safe because every caller historically held the RTNL\nmutex, which serialized all rate-table lookups, inserts and frees.\n\nThat invariant no longer holds. cls_flower sets\nTCF_PROTO_OPS_DOIT_UNLOCKED, so tc_new_tfilter() keeps rtnl_held == false\nfor it and sets TCA_ACT_FLAGS_NO_RTNL. That flag propagates through\ntcf_exts_validate_ex() -\u003e tcf_action_init() -\u003e tcf_action_init_1() -\u003e\ntcf_police_init(), which calls qdisc_get_rtab()/qdisc_put_rtab() with the\nRTNL mutex NOT held. Two RTM_NEWTFILTER requests on different CPUs, each\nadding a flower filter with a police action carrying the same rate, then\nrace on qdisc_rtab_list and on the non-atomic refcnt, leading to a\nuse-after-free / double-free of the kmalloc-2k struct qdisc_rate_table.\nqdisc_rtab_list is a single global (not per-netns), so the corrupted\nobject is shared system-wide.\n\n BUG: KASAN: slab-use-after-free in qdisc_put_rtab+0x12f/0x160\n qdisc_put_rtab+0x12f/0x160\n tcf_police_init+0xda9/0x1590\n tcf_action_init_1+0x460/0x6b0\n tcf_action_init+0x439/0xa40\n tcf_exts_validate_ex+0x42d/0x550\n fl_change+0xddd/0x7da0\n tc_new_tfilter+0xaa7/0x2420\n rtnetlink_rcv_msg+0x95e/0xe90\n which belongs to the cache kmalloc-2k of size 2048\n\nProtect qdisc_rtab_list and the refcount with a dedicated spinlock. The\n(sleeping, GFP_KERNEL) allocation in qdisc_get_rtab() is performed before\ntaking the lock; if a concurrent inserter added an identical table in the\nmeantime the freshly allocated one is freed under the lock, so no\nduplicate is leaked. qdisc_put_rtab() now decrements the refcount and\nunlinks under the same lock."
}
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"value": "AV:L - The bug is reached only via local RTM_NEWTFILTER rtnetlink messages (tc flower filter with police action) through rtnetlink_rcv_msg\u2192tc_new_tfilter\u2192fl_change\u2192tcf_police_init\u2192qdisc_get_rtab/qdisc_put_rtab; no remote packet or network protocol path exists.\nAC:L - cls_flower is TCF_PROTO_OPS_DOIT_UNLOCKED, so concurrent RTM_NEWTFILTER requests run without RTNL; the attacker controls both racing threads/CPUs and can repeatedly install flower filters with identical police rate tables to deterministically hit the global qdisc_rtab_list/refcnt race.\nPR:L - Non-GET rtnetlink handlers require netlink_net_capable(CAP_NET_ADMIN); this is namespace-scoped, so an unprivileged local user obtains CAP_NET_ADMIN via user namespaces (unshare -Urn), sets up clsact/ingress, and installs flower+police rules without init-namespace root.\nUI:N - Exploitation is fully self-contained: the attacker issues the concurrent tc/netlink commands from its own processes and needs no victim to mount filesystems, click links, or perform any other interactive action.\nS:U - Impact is heap corruption and UAF/double-free in kernel kmalloc-2k slabs within the same kernel security authority; although qdisc_rtab_list is global across netns, this is standard kernel memory corruption/privilege escalation, not a VM, IOMMU, or sandbox boundary escape.\nC:H - Concurrent non-atomic refcnt and list updates cause slab use-after-free/double-free of struct qdisc_rate_table (KASAN-confirmed in qdisc_put_rtab); freed 2KB objects are attacker-influenceable via kmalloc timing and are classically weaponizable for arbitrary kernel memory disclosure.\nI:H - The race corrupts a process-global singly linked list and can double-free a kmalloc-2k qdisc_rate_table, yielding classic heap metadata/object corruption primitives that can be developed into arbitrary kernel writes and local privilege escalation/code execution.\nA:H - Demonstrated KASAN slab-use-after-free in qdisc_put_rtab on the error/teardown path, and concurrent double-free of the same rate table can panic the kernel; the trigger is repeatable at will with concurrent netlink requests and causes task death or system-wide instability."
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CVE-2026-68140 (GCVE-0-2026-68140)
Vulnerability from cvelistv5 – Published: 2026-08-10 11:59 – Updated: 2026-10-19 20:58
VLAI
EPSS
VEX
Title
net/iucv: fix use-after-free of a severed iucv_path
Summary
In the Linux kernel, the following vulnerability has been resolved:
net/iucv: fix use-after-free of a severed iucv_path
af_iucv queues not-yet-received message notifications on iucv->message_q,
each holding a raw pointer to the connection's iucv_path. When the peer
severs the connection, iucv_sever_path() frees that path with
iucv_path_free() but leaves the notifications queued. A later recvmsg()
drains message_q via iucv_process_message_q() and hands the stale path to
message_receive() -- a use-after-free of the freed iucv_path.
Drop the queued notifications when the path is severed; once the path is
gone they can no longer be received. This also frees the notifications
leaked when a socket is closed with messages still queued.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:44 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/5f08c5e50bcb46800… | |
| https://git.kernel.org/stable/c/c24faf11bd31bfe05… | |
| https://git.kernel.org/stable/c/99ddb33748698296a… | |
| https://git.kernel.org/stable/c/23658b350b4107e82… | |
| https://git.kernel.org/stable/c/a5bbaddf69853117f… | |
| https://git.kernel.org/stable/c/900cd6d8119b7f3ae… | |
| https://git.kernel.org/stable/c/f579582c03ed52628… | |
| https://git.kernel.org/stable/c/be7cc4656eb1f5402… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
f0703c80e5156406ad947cb67fe277725b48080f , < 5f08c5e50bcb4680069bd3f9edd5728308816ded
(git)
Affected: f0703c80e5156406ad947cb67fe277725b48080f , < c24faf11bd31bfe0500aca12cbdd5a573a954a5d (git) Affected: f0703c80e5156406ad947cb67fe277725b48080f , < 99ddb33748698296a6f17b9b34aa3d16a406bb3c (git) Affected: f0703c80e5156406ad947cb67fe277725b48080f , < 23658b350b4107e8292045c2044983fd426fa15d (git) Affected: f0703c80e5156406ad947cb67fe277725b48080f , < a5bbaddf69853117f28173c3f5c8fc14c6b2ec82 (git) Affected: f0703c80e5156406ad947cb67fe277725b48080f , < 900cd6d8119b7f3ae5c4bf82f922ff5957df43db (git) Affected: f0703c80e5156406ad947cb67fe277725b48080f , < f579582c03ed526281a8450159baf1d35099a85f (git) Affected: f0703c80e5156406ad947cb67fe277725b48080f , < be7cc4656eb1f54029610e82d1f0fdd3f9b5ec0a (git) |
|
| Linux | Linux |
Affected:
2.6.24
Unaffected: 0 , < 2.6.24 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (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 , ≤ * (original_commit_for_fix) |
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CVE-2026-68338 (GCVE-0-2026-68338)
Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-10-19 21:09
VLAI
EPSS
VEX
Title
net/packet: avoid fanout hook re-registration after unregister
Summary
In the Linux kernel, the following vulnerability has been resolved:
net/packet: avoid fanout hook re-registration after unregister
packet_set_ring() temporarily detaches a socket from packet delivery while
reconfiguring its ring. It records the previous running state, clears
po->num, unregisters the protocol hook when needed, drops po->bind_lock,
and later restores po->num and re-registers the hook from the saved
was_running value.
That unlocked window can race with NETDEV_UNREGISTER. The notifier can
observe the socket as not running, skip __unregister_prot_hook(), and
invalidate the per-socket binding by setting po->ifindex to -1 and clearing
po->prot_hook.dev. A one-member fanout group can still retain its shared
fanout hook device pointer. When packet_set_ring() resumes, re-registering
solely from the stale was_running state can re-add the fanout hook after
the device has been unregistered.
Treat po->ifindex == -1 as an invalidated binding after reacquiring
po->bind_lock. This is distinct from ifindex 0, the normal
unbound/wildcard state: ifindex -1 marks an existing device binding that
was invalidated when the device was unregistered. Restore po->num as
before, but do not re-register the hook if device unregister already
detached the socket.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:47 UTC
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/acb40ebfa5c4d62f8… | |
| https://git.kernel.org/stable/c/c820f4b7f2fa38f87… | |
| https://git.kernel.org/stable/c/4628efbdc7affd094… | |
| https://git.kernel.org/stable/c/80ec024d53a05c60a… | |
| https://git.kernel.org/stable/c/0a052e0808e015e68… | |
| https://git.kernel.org/stable/c/1bc55c29cd85818e9… | |
| https://git.kernel.org/stable/c/a885387dae7986a55… | |
| https://git.kernel.org/stable/c/50aff80475abd3533… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
dc99f600698dcac69b8f56dda9a8a00d645c5ffc , < acb40ebfa5c4d62f84339fcbf713f2a9fd033a71
(git)
Affected: dc99f600698dcac69b8f56dda9a8a00d645c5ffc , < c820f4b7f2fa38f8769db0d0cefdd94e2721504d (git) Affected: dc99f600698dcac69b8f56dda9a8a00d645c5ffc , < 4628efbdc7affd094181f5263e65c1062e31f15f (git) Affected: dc99f600698dcac69b8f56dda9a8a00d645c5ffc , < 80ec024d53a05c60ad1d08968dcf745f10c1665c (git) Affected: dc99f600698dcac69b8f56dda9a8a00d645c5ffc , < 0a052e0808e015e68144a9877e6ef42b952c49fa (git) Affected: dc99f600698dcac69b8f56dda9a8a00d645c5ffc , < 1bc55c29cd85818e9052f17deb287d5a11fb817f (git) Affected: dc99f600698dcac69b8f56dda9a8a00d645c5ffc , < a885387dae7986a55bae5c77a15bdd447f64e9b9 (git) Affected: dc99f600698dcac69b8f56dda9a8a00d645c5ffc , < 50aff80475abd3533eef4320477037e6fcc6b56e (git) |
|
| Linux | Linux |
Affected:
3.1
Unaffected: 0 , < 3.1 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (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 , ≤ * (original_commit_for_fix) |
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CVE-2026-68476 (GCVE-0-2026-68476)
Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-09-02 12:49
VLAI
EPSS
VEX
Title
ipvs: reload ip header after head reallocation
Summary
In the Linux kernel, the following vulnerability has been resolved:
ipvs: reload ip header after head reallocation
__ip_vs_get_out_rt() calls skb_ensure_writable() which may
reallocate skb->head.
Severity
9.8 (Critical)
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/4f2d1151421520d7a… | |
| https://git.kernel.org/stable/c/657118cad620172df… | |
| https://git.kernel.org/stable/c/a10f5080afbed2426… | |
| https://git.kernel.org/stable/c/ac6ac3d35bfc0ade9… | |
| https://git.kernel.org/stable/c/e51687fc56c2e39ea… | |
| https://git.kernel.org/stable/c/3fb7edd2018bb1ad0… | |
| https://git.kernel.org/stable/c/ad1e14710b360bda0… | |
| https://git.kernel.org/stable/c/a2f57827bf7c695b8… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 , < 4f2d1151421520d7ae16ca8d367d0ca09f5dfbd7
(git)
Affected: 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 , < 657118cad620172dfd8f6ed5717fd75c0d1f7a5a (git) Affected: 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 , < a10f5080afbed242640f2984328de25f84557da1 (git) Affected: 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 , < ac6ac3d35bfc0ade9d17d354c84e503a946ebdab (git) Affected: 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 , < e51687fc56c2e39ea6e9532925f1aabd4d529f61 (git) Affected: 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 , < 3fb7edd2018bb1ad0a68157383d9b9dac33dd645 (git) Affected: 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 , < ad1e14710b360bda087ebf9fb82460eb5ef775de (git) Affected: 8d8e20e2d7bba8c50e64e0eca1cb83956f468e49 , < a2f57827bf7c695b8c72dc4511cae8e86582369d (git) |
|
| Linux | Linux |
Affected:
4.10
Unaffected: 0 , < 4.10 (semver) Unaffected: 5.10.269 , ≤ 5.10.* (semver) Unaffected: 5.15.220 , ≤ 5.15.* (semver) Unaffected: 6.1.187 , ≤ 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 , ≤ * (original_commit_for_fix) |
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CVE-2026-72242 (GCVE-0-2026-72242)
Vulnerability from cvelistv5 – Published: 2026-08-15 05:54 – Updated: 2026-10-16 18:45
VLAI
EPSS
VEX
Title
selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()
Summary
In the Linux kernel, the following vulnerability has been resolved:
selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()
selinux_sctp_bind_connect() dereferences sk->sk_socket to pass a
struct socket * to selinux_socket_bind() and
selinux_socket_connect_helper(). However, when the hook is invoked
from the ASCONF softirq path (sctp_process_asconf), there is no file
reference guaranteeing that sk->sk_socket is non-NULL. The setsockopt
callers (bindx, connectx, set_primary, sendmsg connect) hold a file
reference and are not affected.
Both selinux_socket_bind() and selinux_socket_connect_helper()
immediately resolve sock->sk, never using the struct socket * for
anything else. Refactor the inner logic into helpers that take a
struct sock * directly so that selinux_sctp_bind_connect() never needs
to touch sk->sk_socket at all.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 18:44 UTC
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/e4f3b8db1b0c5e9f6… | |
| https://git.kernel.org/stable/c/2fcaf133a8fd88b69… | |
| https://git.kernel.org/stable/c/a4bc2fb8536488b37… | |
| https://git.kernel.org/stable/c/5d4d93f9bfbc997ff… | |
| https://git.kernel.org/stable/c/cc8bd47b35eca8239… | |
| https://git.kernel.org/stable/c/d61a80b17254be723… | |
| https://git.kernel.org/stable/c/37d642b37ccdc31e1… | |
| https://git.kernel.org/stable/c/56acfeb10019e200a… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
d452930fd3b9031e59abfeddb2fa383f1403d61a , < e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55
(git)
Affected: d452930fd3b9031e59abfeddb2fa383f1403d61a , < 2fcaf133a8fd88b69f32ebaecad93fd302da828f (git) Affected: d452930fd3b9031e59abfeddb2fa383f1403d61a , < a4bc2fb8536488b37680c0b66c59434a4b7f8c2f (git) Affected: d452930fd3b9031e59abfeddb2fa383f1403d61a , < 5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4 (git) Affected: d452930fd3b9031e59abfeddb2fa383f1403d61a , < cc8bd47b35eca82393cbad08b1cc86f02e034439 (git) Affected: d452930fd3b9031e59abfeddb2fa383f1403d61a , < d61a80b17254be7230bc5544f8e62ddf21ab38e2 (git) Affected: d452930fd3b9031e59abfeddb2fa383f1403d61a , < 37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb (git) Affected: d452930fd3b9031e59abfeddb2fa383f1403d61a , < 56acfeb10019e200ab6787d01f8d7cbe0f01526f (git) |
|
| Linux | Linux |
Affected:
4.17
Unaffected: 0 , < 4.17 (semver) Unaffected: 5.10.266 , ≤ 5.10.* (semver) Unaffected: 5.15.217 , ≤ 5.15.* (semver) Unaffected: 6.1.184 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 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 , ≤ * (original_commit_for_fix) |
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CVE-2026-80586 (GCVE-0-2026-80586)
Vulnerability from cvelistv5 – Published: 2026-08-26 14:37 – Updated: 2026-10-16 19:26
VLAI
EPSS
VEX
Title
mptcp: options: reset DSS fields in case of unexpected size
Summary
In the Linux kernel, the following vulnerability has been resolved:
mptcp: options: reset DSS fields in case of unexpected size
A remote peer could send a malformed DSS with a wrong size, followed by
another DSS or MPC + Data. In this case, the first suboption will be
ignored, but leaving some fields written, which could lead to
inconsistency or access uninitialized data.
Explicitly reset the fields that could have been modified in case of
unexpected size.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 19:17 UTC
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://git.kernel.org/stable/c/15e35fdad7a5576bf… | |
| https://git.kernel.org/stable/c/b1256090816ec4601… | |
| https://git.kernel.org/stable/c/192878df582c51d44… | |
| https://git.kernel.org/stable/c/26dac5c9ffb20812b… | |
| https://git.kernel.org/stable/c/4e80eff5c1c893aca… | |
| https://git.kernel.org/stable/c/1fade1b2ac5b1a494… | |
| https://git.kernel.org/stable/c/27ed642a4e7e4b5df… | |
| https://git.kernel.org/stable/c/35772b4981f38ba80… |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
648ef4b88673dadb8463bf0d4b10fbf33d55def8 , < 15e35fdad7a5576bf3f1c8d688877aeb5d1b506b
(git)
Affected: 648ef4b88673dadb8463bf0d4b10fbf33d55def8 , < b1256090816ec46011601e084be580731df58fc7 (git) Affected: 648ef4b88673dadb8463bf0d4b10fbf33d55def8 , < 192878df582c51d440bf7b91a15f297f29f2b596 (git) Affected: 648ef4b88673dadb8463bf0d4b10fbf33d55def8 , < 26dac5c9ffb20812b475fdf253eb04fab99cff3b (git) Affected: 648ef4b88673dadb8463bf0d4b10fbf33d55def8 , < 4e80eff5c1c893aca2ac1d202f0b256d2e52ecde (git) Affected: 648ef4b88673dadb8463bf0d4b10fbf33d55def8 , < 1fade1b2ac5b1a4948e538fae7313bea57b5ac36 (git) Affected: 648ef4b88673dadb8463bf0d4b10fbf33d55def8 , < 27ed642a4e7e4b5df4b8522c72c457a67e052493 (git) Affected: 648ef4b88673dadb8463bf0d4b10fbf33d55def8 , < 35772b4981f38ba8059372cde8753e8e477e98ec (git) |
|
| Linux | Linux |
Affected:
5.6
Unaffected: 0 , < 5.6 (semver) Unaffected: 5.10.266 , ≤ 5.10.* (semver) Unaffected: 5.15.217 , ≤ 5.15.* (semver) Unaffected: 6.1.184 , ≤ 6.1.* (semver) Unaffected: 6.6.153 , ≤ 6.6.* (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.46 , ≤ 6.18.* (semver) Unaffected: 7.1.10 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: options: reset DSS fields in case of unexpected size\n\nA remote peer could send a malformed DSS with a wrong size, followed by\nanother DSS or MPC + Data. In this case, the first suboption will be\nignored, but leaving some fields written, which could lead to\ninconsistency or access uninitialized data.\n\nExplicitly reset the fields that could have been modified in case of\nunexpected size."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:N - Remote attacker sends crafted TCP segments with malformed MPTCP options that are parsed in the softirq receive path (tcp_v4_rcv/tcp_rcv_established/tcp_data_queue/mptcp_incoming_options/mptcp_get_options), requiring only network reachability to an MPTCP-enabled peer.\nAC:L - Attacker fully controls TCP option bytes on an established MPTCP connection and can deterministically send a size-invalid DSS (setting use_ack/use_map flags) immediately followed by MPC+Data or another DSS in the same header; no race or victim-specific state is required.\nPR:N - Only requires the attacker to be the remote MPTCP/TCP peer of a host with CONFIG_MPTCP enabled; no local account, capabilities, or authenticated access on the victim is needed to reach the vulnerable parser.\nUI:N - Exploitation is fully automated over the network once an MPTCP session exists; the kernel processes malicious segments in softirq without any victim user action beyond ordinary connectivity.\nS:U - Impact is limited to kernel networking/MPTCP connection state on the affected host and does not cross VM, container, or IOMMU security boundaries.\nC:H - Malformed DSS leaves use_ack/use_map/dsn64/data_fin set while data_ack and map fields are never read, so ack_update_msk() and DSS handling consume uninitialized stack values and corrupt metadata that can leak kernel memory contents.\nI:H - Stale DSS flag bits cause forged ack advancement of msk-\u003esnd_una/wnd_end/bytes_acked and bogus DATA_FIN/DSN mapping in skb extensions, corrupting rtx queues and silently altering or truncating application data delivery.\nA:H - Bogus ack state triggers __mptcp_clean_una() WARN_ON_ONCE paths outside recovery, can abort or hang MPTCP connections, and may kernel-panic systems built with panic_on_warn."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-27T05:02:07.204Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/15e35fdad7a5576bf3f1c8d688877aeb5d1b506b"
},
{
"url": "https://git.kernel.org/stable/c/b1256090816ec46011601e084be580731df58fc7"
},
{
"url": "https://git.kernel.org/stable/c/192878df582c51d440bf7b91a15f297f29f2b596"
},
{
"url": "https://git.kernel.org/stable/c/26dac5c9ffb20812b475fdf253eb04fab99cff3b"
},
{
"url": "https://git.kernel.org/stable/c/4e80eff5c1c893aca2ac1d202f0b256d2e52ecde"
},
{
"url": "https://git.kernel.org/stable/c/1fade1b2ac5b1a4948e538fae7313bea57b5ac36"
},
{
"url": "https://git.kernel.org/stable/c/27ed642a4e7e4b5df4b8522c72c457a67e052493"
},
{
"url": "https://git.kernel.org/stable/c/35772b4981f38ba8059372cde8753e8e477e98ec"
}
],
"title": "mptcp: options: reset DSS fields in case of unexpected size",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-80586",
"datePublished": "2026-08-26T14:37:41.493Z",
"dateReserved": "2026-08-26T14:34:25.769Z",
"dateUpdated": "2026-10-16T19:26:28.632Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Trend slope:
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(linear fit over daily sighting counts)
Show additional events:
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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