CVE-2024-26793 (GCVE-0-2024-26793)
Vulnerability from cvelistv5 – Published: 2024-04-04 08:20 – Updated: 2026-08-05 11:27
VLAI
EPSS
VEX
Title
gtp: fix use-after-free and null-ptr-deref in gtp_newlink()
Summary
In the Linux kernel, the following vulnerability has been resolved:
gtp: fix use-after-free and null-ptr-deref in gtp_newlink()
The gtp_link_ops operations structure for the subsystem must be
registered after registering the gtp_net_ops pernet operations structure.
Syzkaller hit 'general protection fault in gtp_genl_dump_pdp' bug:
[ 1010.702740] gtp: GTP module unloaded
[ 1010.715877] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI
[ 1010.715888] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
[ 1010.715895] CPU: 1 PID: 128616 Comm: a.out Not tainted 6.8.0-rc6-std-def-alt1 #1
[ 1010.715899] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-alt1 04/01/2014
[ 1010.715908] RIP: 0010:gtp_newlink+0x4d7/0x9c0 [gtp]
[ 1010.715915] Code: 80 3c 02 00 0f 85 41 04 00 00 48 8b bb d8 05 00 00 e8 ed f6 ff ff 48 89 c2 48 89 c5 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 4f 04 00 00 4c 89 e2 4c 8b 6d 00 48 b8 00 00 00
[ 1010.715920] RSP: 0018:ffff888020fbf180 EFLAGS: 00010203
[ 1010.715929] RAX: dffffc0000000000 RBX: ffff88800399c000 RCX: 0000000000000000
[ 1010.715933] RDX: 0000000000000001 RSI: ffffffff84805280 RDI: 0000000000000282
[ 1010.715938] RBP: 000000000000000d R08: 0000000000000001 R09: 0000000000000000
[ 1010.715942] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800399cc80
[ 1010.715947] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000400
[ 1010.715953] FS: 00007fd1509ab5c0(0000) GS:ffff88805b300000(0000) knlGS:0000000000000000
[ 1010.715958] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1010.715962] CR2: 0000000000000000 CR3: 000000001c07a000 CR4: 0000000000750ee0
[ 1010.715968] PKRU: 55555554
[ 1010.715972] Call Trace:
[ 1010.715985] ? __die_body.cold+0x1a/0x1f
[ 1010.715995] ? die_addr+0x43/0x70
[ 1010.716002] ? exc_general_protection+0x199/0x2f0
[ 1010.716016] ? asm_exc_general_protection+0x1e/0x30
[ 1010.716026] ? gtp_newlink+0x4d7/0x9c0 [gtp]
[ 1010.716034] ? gtp_net_exit+0x150/0x150 [gtp]
[ 1010.716042] __rtnl_newlink+0x1063/0x1700
[ 1010.716051] ? rtnl_setlink+0x3c0/0x3c0
[ 1010.716063] ? is_bpf_text_address+0xc0/0x1f0
[ 1010.716070] ? kernel_text_address.part.0+0xbb/0xd0
[ 1010.716076] ? __kernel_text_address+0x56/0xa0
[ 1010.716084] ? unwind_get_return_address+0x5a/0xa0
[ 1010.716091] ? create_prof_cpu_mask+0x30/0x30
[ 1010.716098] ? arch_stack_walk+0x9e/0xf0
[ 1010.716106] ? stack_trace_save+0x91/0xd0
[ 1010.716113] ? stack_trace_consume_entry+0x170/0x170
[ 1010.716121] ? __lock_acquire+0x15c5/0x5380
[ 1010.716139] ? mark_held_locks+0x9e/0xe0
[ 1010.716148] ? kmem_cache_alloc_trace+0x35f/0x3c0
[ 1010.716155] ? __rtnl_newlink+0x1700/0x1700
[ 1010.716160] rtnl_newlink+0x69/0xa0
[ 1010.716166] rtnetlink_rcv_msg+0x43b/0xc50
[ 1010.716172] ? rtnl_fdb_dump+0x9f0/0x9f0
[ 1010.716179] ? lock_acquire+0x1fe/0x560
[ 1010.716188] ? netlink_deliver_tap+0x12f/0xd50
[ 1010.716196] netlink_rcv_skb+0x14d/0x440
[ 1010.716202] ? rtnl_fdb_dump+0x9f0/0x9f0
[ 1010.716208] ? netlink_ack+0xab0/0xab0
[ 1010.716213] ? netlink_deliver_tap+0x202/0xd50
[ 1010.716220] ? netlink_deliver_tap+0x218/0xd50
[ 1010.716226] ? __virt_addr_valid+0x30b/0x590
[ 1010.716233] netlink_unicast+0x54b/0x800
[ 1010.716240] ? netlink_attachskb+0x870/0x870
[ 1010.716248] ? __check_object_size+0x2de/0x3b0
[ 1010.716254] netlink_sendmsg+0x938/0xe40
[ 1010.716261] ? netlink_unicast+0x800/0x800
[ 1010.716269] ? __import_iovec+0x292/0x510
[ 1010.716276] ? netlink_unicast+0x800/0x800
[ 1010.716284] __sock_sendmsg+0x159/0x190
[ 1010.716290] ____sys_sendmsg+0x712/0x880
[ 1010.716297] ? sock_write_iter+0x3d0/0x3d0
[ 1010.716304] ? __ia32_sys_recvmmsg+0x270/0x270
[ 1010.716309] ? lock_acquire+0x1fe/0x560
[ 1010.716315] ? drain_array_locked+0x90/0x90
[ 1010.716324] ___sys_sendmsg+0xf8/0x170
[ 1010.716331] ? sendmsg_copy_msghdr+0x170/0x170
[ 1010.716337] ? lockdep_init_map
---truncated---
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 15:50 UTC
Assigner
References
10 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
459aa660eb1d8ce67080da1983bb81d716aa5a69 , < 01129059d5141d62fae692f7a336ae3bc712d3eb
(git)
Affected: 459aa660eb1d8ce67080da1983bb81d716aa5a69 , < ec92aa2cab6f0048f10d6aa4f025c5885cb1a1b6 (git) Affected: 459aa660eb1d8ce67080da1983bb81d716aa5a69 , < e668b92a3a01429923fd5ca13e99642aab47de69 (git) Affected: 459aa660eb1d8ce67080da1983bb81d716aa5a69 , < 9376d059a705c5dfaac566c2d09891242013ae16 (git) Affected: 459aa660eb1d8ce67080da1983bb81d716aa5a69 , < abd32d7f5c0294c1b2454c5a3b13b18446bac627 (git) Affected: 459aa660eb1d8ce67080da1983bb81d716aa5a69 , < 93dd420bc41531c9a31498b9538ca83ba6ec191e (git) Affected: 459aa660eb1d8ce67080da1983bb81d716aa5a69 , < 5366969a19a8a0d2ffb3d27ef6e8905e5e4216f8 (git) Affected: 459aa660eb1d8ce67080da1983bb81d716aa5a69 , < 616d82c3cfa2a2146dd7e3ae47bda7e877ee549e (git) |
guessed | |
| Linux | Linux |
Affected:
4.7
Unaffected: 0 , < 4.7 (semver) Unaffected: 4.19.309 , ≤ 4.19.* (semver) Unaffected: 5.4.271 , ≤ 5.4.* (semver) Unaffected: 5.10.212 , ≤ 5.10.* (semver) Unaffected: 5.15.151 , ≤ 5.15.* (semver) Unaffected: 6.1.81 , ≤ 6.1.* (semver) Unaffected: 6.6.21 , ≤ 6.6.* (semver) Unaffected: 6.7.9 , ≤ 6.7.* (semver) Unaffected: 6.8 , ≤ * (original_commit_for_fix) |
guessed |
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngtp: fix use-after-free and null-ptr-deref in gtp_newlink()\n\nThe gtp_link_ops operations structure for the subsystem must be\nregistered after registering the gtp_net_ops pernet operations structure.\n\nSyzkaller hit \u0027general protection fault in gtp_genl_dump_pdp\u0027 bug:\n\n[ 1010.702740] gtp: GTP module unloaded\n[ 1010.715877] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI\n[ 1010.715888] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\n[ 1010.715895] CPU: 1 PID: 128616 Comm: a.out Not tainted 6.8.0-rc6-std-def-alt1 #1\n[ 1010.715899] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-alt1 04/01/2014\n[ 1010.715908] RIP: 0010:gtp_newlink+0x4d7/0x9c0 [gtp]\n[ 1010.715915] Code: 80 3c 02 00 0f 85 41 04 00 00 48 8b bb d8 05 00 00 e8 ed f6 ff ff 48 89 c2 48 89 c5 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 \u003c80\u003e 3c 02 00 0f 85 4f 04 00 00 4c 89 e2 4c 8b 6d 00 48 b8 00 00 00\n[ 1010.715920] RSP: 0018:ffff888020fbf180 EFLAGS: 00010203\n[ 1010.715929] RAX: dffffc0000000000 RBX: ffff88800399c000 RCX: 0000000000000000\n[ 1010.715933] RDX: 0000000000000001 RSI: ffffffff84805280 RDI: 0000000000000282\n[ 1010.715938] RBP: 000000000000000d R08: 0000000000000001 R09: 0000000000000000\n[ 1010.715942] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800399cc80\n[ 1010.715947] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000400\n[ 1010.715953] FS: 00007fd1509ab5c0(0000) GS:ffff88805b300000(0000) knlGS:0000000000000000\n[ 1010.715958] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 1010.715962] CR2: 0000000000000000 CR3: 000000001c07a000 CR4: 0000000000750ee0\n[ 1010.715968] PKRU: 55555554\n[ 1010.715972] Call Trace:\n[ 1010.715985] ? __die_body.cold+0x1a/0x1f\n[ 1010.715995] ? die_addr+0x43/0x70\n[ 1010.716002] ? exc_general_protection+0x199/0x2f0\n[ 1010.716016] ? asm_exc_general_protection+0x1e/0x30\n[ 1010.716026] ? gtp_newlink+0x4d7/0x9c0 [gtp]\n[ 1010.716034] ? gtp_net_exit+0x150/0x150 [gtp]\n[ 1010.716042] __rtnl_newlink+0x1063/0x1700\n[ 1010.716051] ? rtnl_setlink+0x3c0/0x3c0\n[ 1010.716063] ? is_bpf_text_address+0xc0/0x1f0\n[ 1010.716070] ? kernel_text_address.part.0+0xbb/0xd0\n[ 1010.716076] ? __kernel_text_address+0x56/0xa0\n[ 1010.716084] ? unwind_get_return_address+0x5a/0xa0\n[ 1010.716091] ? create_prof_cpu_mask+0x30/0x30\n[ 1010.716098] ? arch_stack_walk+0x9e/0xf0\n[ 1010.716106] ? stack_trace_save+0x91/0xd0\n[ 1010.716113] ? stack_trace_consume_entry+0x170/0x170\n[ 1010.716121] ? __lock_acquire+0x15c5/0x5380\n[ 1010.716139] ? mark_held_locks+0x9e/0xe0\n[ 1010.716148] ? kmem_cache_alloc_trace+0x35f/0x3c0\n[ 1010.716155] ? __rtnl_newlink+0x1700/0x1700\n[ 1010.716160] rtnl_newlink+0x69/0xa0\n[ 1010.716166] rtnetlink_rcv_msg+0x43b/0xc50\n[ 1010.716172] ? rtnl_fdb_dump+0x9f0/0x9f0\n[ 1010.716179] ? lock_acquire+0x1fe/0x560\n[ 1010.716188] ? netlink_deliver_tap+0x12f/0xd50\n[ 1010.716196] netlink_rcv_skb+0x14d/0x440\n[ 1010.716202] ? rtnl_fdb_dump+0x9f0/0x9f0\n[ 1010.716208] ? netlink_ack+0xab0/0xab0\n[ 1010.716213] ? netlink_deliver_tap+0x202/0xd50\n[ 1010.716220] ? netlink_deliver_tap+0x218/0xd50\n[ 1010.716226] ? __virt_addr_valid+0x30b/0x590\n[ 1010.716233] netlink_unicast+0x54b/0x800\n[ 1010.716240] ? netlink_attachskb+0x870/0x870\n[ 1010.716248] ? __check_object_size+0x2de/0x3b0\n[ 1010.716254] netlink_sendmsg+0x938/0xe40\n[ 1010.716261] ? netlink_unicast+0x800/0x800\n[ 1010.716269] ? __import_iovec+0x292/0x510\n[ 1010.716276] ? netlink_unicast+0x800/0x800\n[ 1010.716284] __sock_sendmsg+0x159/0x190\n[ 1010.716290] ____sys_sendmsg+0x712/0x880\n[ 1010.716297] ? sock_write_iter+0x3d0/0x3d0\n[ 1010.716304] ? __ia32_sys_recvmmsg+0x270/0x270\n[ 1010.716309] ? lock_acquire+0x1fe/0x560\n[ 1010.716315] ? drain_array_locked+0x90/0x90\n[ 1010.716324] ___sys_sendmsg+0xf8/0x170\n[ 1010.716331] ? sendmsg_copy_msghdr+0x170/0x170\n[ 1010.716337] ? lockdep_init_map\n---truncated---"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The vulnerability is triggered by an `RTM_NEWLINK` rtnetlink message with `IFLA_INFO_KIND=\"gtp\"` sent over an `AF_NETLINK` socket via `sendmsg()`, which requires local system access. There is no remote or adjacent-network path into `gtp_newlink()`.\nAC:L - The attacker creates and controls both sides of the race \u2014 one thread\u0027s own `RTM_NEWLINK` triggers `request_module(\"rtnl-link-gtp\")` while sibling threads block on `rtnl_lock` inside `__rtnl_newlink()`, and `rtnl_link_register()` releasing that lock inside `gtp_init()` hands a waiter the lock before `register_pernet_subsys()` completes. Syzkaller reproduced it from an ordinary userspace binary, and the same inverted ordering is also hit deterministically on the module-init error path.\nPR:L - `rtnetlink_rcv_msg()` only requires `netlink_net_capable(skb, CAP_NET_ADMIN)`, which is evaluated against the socket\u0027s `net-\u003euser_ns`, so an unprivileged user obtains it with `unshare -Urn`. Module autoload via `request_module()` in `__rtnl_newlink()` adds no further capability gate, so no real root is needed.\nUI:N - The attacker performs the entire sequence \u2014 autoload trigger plus racing link-creation requests \u2014 from their own threads. No victim action or pre-existing system state is required.\nS:U - The corruption stays within the kernel\u0027s own memory and security authority; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - `ops_free_list()` frees the per-net `struct gtp_net` without clearing `ng-\u003eptr[id]`, so `net_generic()` returns a dangling pointer whose reused slab contents are read as a list head and subsequently walked and marshalled to userspace by `gtp_genl_dump_pdp()`, giving a use-after-free read primitive over adjacent kernel heap data.\nI:H - `__list_add_rcu()` performs `next-\u003eprev = new` where `next` is read from the freed/garbage `gn-\u003egtp_dev_list`, so an attacker who sprays the reallocated 16-byte object controls the destination and writes a kernel heap pointer to an arbitrary address \u2014 a write primitive suitable for control-flow hijacking.\nA:H - The unfixed path reliably produces a general protection fault / null-pointer dereference in `gtp_newlink()` (the reported oops), and the use-after-free variant corrupts the slab, both resulting in kernel crashes."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T11:27:17.339Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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{
"url": "https://git.kernel.org/stable/c/01129059d5141d62fae692f7a336ae3bc712d3eb"
},
{
"url": "https://git.kernel.org/stable/c/ec92aa2cab6f0048f10d6aa4f025c5885cb1a1b6"
},
{
"url": "https://git.kernel.org/stable/c/e668b92a3a01429923fd5ca13e99642aab47de69"
},
{
"url": "https://git.kernel.org/stable/c/9376d059a705c5dfaac566c2d09891242013ae16"
},
{
"url": "https://git.kernel.org/stable/c/abd32d7f5c0294c1b2454c5a3b13b18446bac627"
},
{
"url": "https://git.kernel.org/stable/c/93dd420bc41531c9a31498b9538ca83ba6ec191e"
},
{
"url": "https://git.kernel.org/stable/c/5366969a19a8a0d2ffb3d27ef6e8905e5e4216f8"
},
{
"url": "https://git.kernel.org/stable/c/616d82c3cfa2a2146dd7e3ae47bda7e877ee549e"
}
],
"title": "gtp: fix use-after-free and null-ptr-deref in gtp_newlink()",
"x_generator": {
"engine": "bippy-1.2.0"
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}
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"assignerShortName": "Linux",
"cveId": "CVE-2024-26793",
"datePublished": "2024-04-04T08:20:23.771Z",
"dateReserved": "2024-02-19T14:20:24.178Z",
"dateUpdated": "2026-08-05T11:27:17.339Z",
"state": "PUBLISHED"
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"date": "2026-09-19",
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"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngtp: fix use-after-free and null-ptr-deref in gtp_newlink()\n\nThe gtp_link_ops operations structure for the subsystem must be\nregistered after registering the gtp_net_ops pernet operations structure.\n\nSyzkaller hit \u0027general protection fault in gtp_genl_dump_pdp\u0027 bug:\n\n[ 1010.702740] gtp: GTP module unloaded\n[ 1010.715877] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI\n[ 1010.715888] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\n[ 1010.715895] CPU: 1 PID: 128616 Comm: a.out Not tainted 6.8.0-rc6-std-def-alt1 #1\n[ 1010.715899] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-alt1 04/01/2014\n[ 1010.715908] RIP: 0010:gtp_newlink+0x4d7/0x9c0 [gtp]\n[ 1010.715915] Code: 80 3c 02 00 0f 85 41 04 00 00 48 8b bb d8 05 00 00 e8 ed f6 ff ff 48 89 c2 48 89 c5 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 \u003c80\u003e 3c 02 00 0f 85 4f 04 00 00 4c 89 e2 4c 8b 6d 00 48 b8 00 00 00\n[ 1010.715920] RSP: 0018:ffff888020fbf180 EFLAGS: 00010203\n[ 1010.715929] RAX: dffffc0000000000 RBX: ffff88800399c000 RCX: 0000000000000000\n[ 1010.715933] RDX: 0000000000000001 RSI: ffffffff84805280 RDI: 0000000000000282\n[ 1010.715938] RBP: 000000000000000d R08: 0000000000000001 R09: 0000000000000000\n[ 1010.715942] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800399cc80\n[ 1010.715947] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000400\n[ 1010.715953] FS: 00007fd1509ab5c0(0000) GS:ffff88805b300000(0000) knlGS:0000000000000000\n[ 1010.715958] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 1010.715962] CR2: 0000000000000000 CR3: 000000001c07a000 CR4: 0000000000750ee0\n[ 1010.715968] PKRU: 55555554\n[ 1010.715972] Call Trace:\n[ 1010.715985] ? __die_body.cold+0x1a/0x1f\n[ 1010.715995] ? die_addr+0x43/0x70\n[ 1010.716002] ? exc_general_protection+0x199/0x2f0\n[ 1010.716016] ? asm_exc_general_protection+0x1e/0x30\n[ 1010.716026] ? gtp_newlink+0x4d7/0x9c0 [gtp]\n[ 1010.716034] ? gtp_net_exit+0x150/0x150 [gtp]\n[ 1010.716042] __rtnl_newlink+0x1063/0x1700\n[ 1010.716051] ? rtnl_setlink+0x3c0/0x3c0\n[ 1010.716063] ? is_bpf_text_address+0xc0/0x1f0\n[ 1010.716070] ? kernel_text_address.part.0+0xbb/0xd0\n[ 1010.716076] ? __kernel_text_address+0x56/0xa0\n[ 1010.716084] ? unwind_get_return_address+0x5a/0xa0\n[ 1010.716091] ? create_prof_cpu_mask+0x30/0x30\n[ 1010.716098] ? arch_stack_walk+0x9e/0xf0\n[ 1010.716106] ? stack_trace_save+0x91/0xd0\n[ 1010.716113] ? stack_trace_consume_entry+0x170/0x170\n[ 1010.716121] ? __lock_acquire+0x15c5/0x5380\n[ 1010.716139] ? mark_held_locks+0x9e/0xe0\n[ 1010.716148] ? kmem_cache_alloc_trace+0x35f/0x3c0\n[ 1010.716155] ? __rtnl_newlink+0x1700/0x1700\n[ 1010.716160] rtnl_newlink+0x69/0xa0\n[ 1010.716166] rtnetlink_rcv_msg+0x43b/0xc50\n[ 1010.716172] ? rtnl_fdb_dump+0x9f0/0x9f0\n[ 1010.716179] ? lock_acquire+0x1fe/0x560\n[ 1010.716188] ? netlink_deliver_tap+0x12f/0xd50\n[ 1010.716196] netlink_rcv_skb+0x14d/0x440\n[ 1010.716202] ? rtnl_fdb_dump+0x9f0/0x9f0\n[ 1010.716208] ? netlink_ack+0xab0/0xab0\n[ 1010.716213] ? netlink_deliver_tap+0x202/0xd50\n[ 1010.716220] ? netlink_deliver_tap+0x218/0xd50\n[ 1010.716226] ? __virt_addr_valid+0x30b/0x590\n[ 1010.716233] netlink_unicast+0x54b/0x800\n[ 1010.716240] ? netlink_attachskb+0x870/0x870\n[ 1010.716248] ? __check_object_size+0x2de/0x3b0\n[ 1010.716254] netlink_sendmsg+0x938/0xe40\n[ 1010.716261] ? netlink_unicast+0x800/0x800\n[ 1010.716269] ? __import_iovec+0x292/0x510\n[ 1010.716276] ? netlink_unicast+0x800/0x800\n[ 1010.716284] __sock_sendmsg+0x159/0x190\n[ 1010.716290] ____sys_sendmsg+0x712/0x880\n[ 1010.716297] ? sock_write_iter+0x3d0/0x3d0\n[ 1010.716304] ? __ia32_sys_recvmmsg+0x270/0x270\n[ 1010.716309] ? lock_acquire+0x1fe/0x560\n[ 1010.716315] ? drain_array_locked+0x90/0x90\n[ 1010.716324] ___sys_sendmsg+0xf8/0x170\n[ 1010.716331] ? sendmsg_copy_msghdr+0x170/0x170\n[ 1010.716337] ? lockdep_init_map\n---truncated---"
},
{
"lang": "es",
"value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: gtp: corrige use-after-free y null-ptr-deref en gtp_newlink() La estructura de operaciones gtp_link_ops para el subSYSTEM debe registrarse despu\u00e9s de registrar la estructura de operaciones pernet gtp_net_ops. Syzkaller encontr\u00f3 el error \u0027fallo de protecci\u00f3n general en gtp_genl_dump_pdp\u0027: [1010.702740] gtp: m\u00f3dulo GTP descargado [1010.715877] fallo de protecci\u00f3n general, probablemente para la direcci\u00f3n no can\u00f3nica 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI [1010.715888 ] KASAN: ptr nulo -deref en el rango [0x0000000000000008-0x000000000000000f] [ 1010.715895] CPU: 1 PID: 128616 Comm: a.out No contaminado 6.8.0-rc6-std-def-alt1 #1 [ 1010.715899] Nombre de hardware: Est\u00e1ndar QEMU PC (Q35+ ICH9, 2009), BIOS 1.16.0-alt1 01/04/2014 [ 1010.715908] RIP: 0010:gtp_newlink+0x4d7/0x9c0 [gtp] [ 1010.715915] C\u00f3digo: 80 3c 02 00 0f 85 41 04 00 0 0 48 8b bb d8 05 00 00 e8 ed f6 ff ff 48 89 c2 48 89 c5 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 \u0026lt;80\u0026gt; 3c 02 00 0f 85 4f 04 00 00 4c 89 e2 4c 8b 6d 00 4 8b8 00 00 00 [ 1010.715920] RSP: 0018:ffff888020fbf180 EFLAGS: 00010203 [ 1010.715929] RAX: dffffc0000000000 RBX: ffff88800399c000 RCX: 0000000000000 000 [ 1010.715933] RDX: 00000000000000001 RSI: ffffffff84805280 RDI: 0000000000000282 [ 1010.715938] RBP: 000000000000000d R08: 000000000000 0001 R09: 0000000000000000 [ 1010.715942] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800399cc80 [ 1010.715947] R13: 0000000000000000 R14: 00000000000 00000 R15: 0000000000000400 [ 1010.715953] FS: 00007fd1509ab5c0(0000) GS:ffff88805b300000(0000) knlGS:0000000000000000 [ 1010.715958] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1010.715962] CR2: 0000000000000000 CR3: 000000001c07a000 CR4: 0000000000750ee0 [ 1010.715968] PKRU: 55555 554 [1010.715972] Seguimiento de llamadas: [1010.715985]? __die_body.cold+0x1a/0x1f [ 1010.715995] ? die_addr+0x43/0x70 [1010.716002]? exc_general_protection+0x199/0x2f0 [1010.716016]? asm_exc_general_protection+0x1e/0x30 [1010.716026]? gtp_newlink+0x4d7/0x9c0 [gtp] [ 1010.716034] ? gtp_net_exit+0x150/0x150 [gtp] [ 1010.716042] __rtnl_newlink+0x1063/0x1700 [ 1010.716051] ? rtnl_setlink+0x3c0/0x3c0 [1010.716063]? is_bpf_text_address+0xc0/0x1f0 [1010.716070]? kernel_text_address.part.0+0xbb/0xd0 [1010.716076]? __kernel_text_address+0x56/0xa0 [ 1010.716084] ? unwind_get_return_address+0x5a/0xa0 [1010.716091]? create_prof_cpu_mask+0x30/0x30 [1010.716098]? arch_stack_walk+0x9e/0xf0 [1010.716106]? stack_trace_save+0x91/0xd0 [1010.716113]? stack_trace_consume_entry+0x170/0x170 [1010.716121]? __lock_acquire+0x15c5/0x5380 [1010.716139]? mark_held_locks+0x9e/0xe0 [1010.716148]? \u00bfkmem_cache_alloc_trace+0x35f/0x3c0 [1010.716155]? __rtnl_newlink+0x1700/0x1700 [ 1010.716160] rtnl_newlink+0x69/0xa0 [ 1010.716166] rtnetlink_rcv_msg+0x43b/0xc50 [ 1010.716172] ? rtnl_fdb_dump+0x9f0/0x9f0 [1010.716179]? lock_acquire+0x1fe/0x560 [1010.716188]? netlink_deliver_tap+0x12f/0xd50 [ 1010.716196] netlink_rcv_skb+0x14d/0x440 [ 1010.716202] ? rtnl_fdb_dump+0x9f0/0x9f0 [1010.716208]? netlink_ack+0xab0/0xab0 [1010.716213]? netlink_deliver_tap+0x202/0xd50 [1010.716220]? netlink_deliver_tap+0x218/0xd50 [1010.716226]? __virt_addr_valid+0x30b/0x590 [ 1010.716233] netlink_unicast+0x54b/0x800 [ 1010.716240] ? netlink_attachskb+0x870/0x870 [1010.716248]? __check_object_size+0x2de/0x3b0 [ 1010.716254] netlink_sendmsg+0x938/0xe40 [ 1010.716261] ? netlink_unicast+0x800/0x800 [1010.716269]? __import_iovec+0x292/0x510 [ 1010.716276] ? netlink_unicast+0x800/0x800 [ 1010.716284] __sock_sendmsg+0x159/0x190 [ 1010.716290] ____sys_sendmsg+0x712/0x880 [ 1010.716297] ? sock_write_iter+0x3d0/0x3d0 [1010.716304]? __ia32_sys_recvmmsg+0x270/0x270 [1010.716309]? lock_acquire+0x1fe/0x560 [1010.716315]? Drain_array_locked+0x90/0x90 [ 1010.716324] ___sys_sendmsg+0xf8/0x170 [ 1010.716331] ? sendmsg_copy_msghdr+0x170/0x170 [1010.716337]? lockdep_init_map ---truncado---"
}
],
"id": "CVE-2024-26793",
"lastModified": "2024-12-20T15:56:00.320",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2024-04-04T09:15:08.620",
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{
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"version": "0",
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{
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"version": "4.19.309",
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{
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"version": "5.4.271",
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{
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"version": "5.10.212",
"versionType": "semver"
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{
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"version": "5.15.151",
"versionType": "semver"
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{
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"status": "unaffected",
"version": "6.1.81",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.6.21",
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},
{
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"status": "unaffected",
"version": "6.7.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.8",
"versionType": "original_commit_for_fix"
}
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}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
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"vulnerable": true
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{
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"matchCriteriaId": "AEB9199B-AB8F-4877-8964-E2BA95B5F15C",
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngtp: fix use-after-free and null-ptr-deref in gtp_newlink()\n\nThe gtp_link_ops operations structure for the subsystem must be\nregistered after registering the gtp_net_ops pernet operations structure.\n\nSyzkaller hit \u0027general protection fault in gtp_genl_dump_pdp\u0027 bug:\n\n[ 1010.702740] gtp: GTP module unloaded\n[ 1010.715877] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI\n[ 1010.715888] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\n[ 1010.715895] CPU: 1 PID: 128616 Comm: a.out Not tainted 6.8.0-rc6-std-def-alt1 #1\n[ 1010.715899] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-alt1 04/01/2014\n[ 1010.715908] RIP: 0010:gtp_newlink+0x4d7/0x9c0 [gtp]\n[ 1010.715915] Code: 80 3c 02 00 0f 85 41 04 00 00 48 8b bb d8 05 00 00 e8 ed f6 ff ff 48 89 c2 48 89 c5 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 \u003c80\u003e 3c 02 00 0f 85 4f 04 00 00 4c 89 e2 4c 8b 6d 00 48 b8 00 00 00\n[ 1010.715920] RSP: 0018:ffff888020fbf180 EFLAGS: 00010203\n[ 1010.715929] RAX: dffffc0000000000 RBX: ffff88800399c000 RCX: 0000000000000000\n[ 1010.715933] RDX: 0000000000000001 RSI: ffffffff84805280 RDI: 0000000000000282\n[ 1010.715938] RBP: 000000000000000d R08: 0000000000000001 R09: 0000000000000000\n[ 1010.715942] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800399cc80\n[ 1010.715947] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000400\n[ 1010.715953] FS: 00007fd1509ab5c0(0000) GS:ffff88805b300000(0000) knlGS:0000000000000000\n[ 1010.715958] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 1010.715962] CR2: 0000000000000000 CR3: 000000001c07a000 CR4: 0000000000750ee0\n[ 1010.715968] PKRU: 55555554\n[ 1010.715972] Call Trace:\n[ 1010.715985] ? __die_body.cold+0x1a/0x1f\n[ 1010.715995] ? die_addr+0x43/0x70\n[ 1010.716002] ? exc_general_protection+0x199/0x2f0\n[ 1010.716016] ? asm_exc_general_protection+0x1e/0x30\n[ 1010.716026] ? gtp_newlink+0x4d7/0x9c0 [gtp]\n[ 1010.716034] ? gtp_net_exit+0x150/0x150 [gtp]\n[ 1010.716042] __rtnl_newlink+0x1063/0x1700\n[ 1010.716051] ? rtnl_setlink+0x3c0/0x3c0\n[ 1010.716063] ? is_bpf_text_address+0xc0/0x1f0\n[ 1010.716070] ? kernel_text_address.part.0+0xbb/0xd0\n[ 1010.716076] ? __kernel_text_address+0x56/0xa0\n[ 1010.716084] ? unwind_get_return_address+0x5a/0xa0\n[ 1010.716091] ? create_prof_cpu_mask+0x30/0x30\n[ 1010.716098] ? arch_stack_walk+0x9e/0xf0\n[ 1010.716106] ? stack_trace_save+0x91/0xd0\n[ 1010.716113] ? stack_trace_consume_entry+0x170/0x170\n[ 1010.716121] ? __lock_acquire+0x15c5/0x5380\n[ 1010.716139] ? mark_held_locks+0x9e/0xe0\n[ 1010.716148] ? kmem_cache_alloc_trace+0x35f/0x3c0\n[ 1010.716155] ? __rtnl_newlink+0x1700/0x1700\n[ 1010.716160] rtnl_newlink+0x69/0xa0\n[ 1010.716166] rtnetlink_rcv_msg+0x43b/0xc50\n[ 1010.716172] ? rtnl_fdb_dump+0x9f0/0x9f0\n[ 1010.716179] ? lock_acquire+0x1fe/0x560\n[ 1010.716188] ? netlink_deliver_tap+0x12f/0xd50\n[ 1010.716196] netlink_rcv_skb+0x14d/0x440\n[ 1010.716202] ? rtnl_fdb_dump+0x9f0/0x9f0\n[ 1010.716208] ? netlink_ack+0xab0/0xab0\n[ 1010.716213] ? netlink_deliver_tap+0x202/0xd50\n[ 1010.716220] ? netlink_deliver_tap+0x218/0xd50\n[ 1010.716226] ? __virt_addr_valid+0x30b/0x590\n[ 1010.716233] netlink_unicast+0x54b/0x800\n[ 1010.716240] ? netlink_attachskb+0x870/0x870\n[ 1010.716248] ? __check_object_size+0x2de/0x3b0\n[ 1010.716254] netlink_sendmsg+0x938/0xe40\n[ 1010.716261] ? netlink_unicast+0x800/0x800\n[ 1010.716269] ? __import_iovec+0x292/0x510\n[ 1010.716276] ? netlink_unicast+0x800/0x800\n[ 1010.716284] __sock_sendmsg+0x159/0x190\n[ 1010.716290] ____sys_sendmsg+0x712/0x880\n[ 1010.716297] ? sock_write_iter+0x3d0/0x3d0\n[ 1010.716304] ? __ia32_sys_recvmmsg+0x270/0x270\n[ 1010.716309] ? lock_acquire+0x1fe/0x560\n[ 1010.716315] ? drain_array_locked+0x90/0x90\n[ 1010.716324] ___sys_sendmsg+0xf8/0x170\n[ 1010.716331] ? sendmsg_copy_msghdr+0x170/0x170\n[ 1010.716337] ? lockdep_init_map\n---truncated---"
},
{
"lang": "es",
"value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: gtp: corrige use-after-free y null-ptr-deref en gtp_newlink() La estructura de operaciones gtp_link_ops para el subSYSTEM debe registrarse despu\u00e9s de registrar la estructura de operaciones pernet gtp_net_ops. Syzkaller encontr\u00f3 el error \u0027fallo de protecci\u00f3n general en gtp_genl_dump_pdp\u0027: [1010.702740] gtp: m\u00f3dulo GTP descargado [1010.715877] fallo de protecci\u00f3n general, probablemente para la direcci\u00f3n no can\u00f3nica 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI [1010.715888 ] KASAN: ptr nulo -deref en el rango [0x0000000000000008-0x000000000000000f] [ 1010.715895] CPU: 1 PID: 128616 Comm: a.out No contaminado 6.8.0-rc6-std-def-alt1 #1 [ 1010.715899] Nombre de hardware: Est\u00e1ndar QEMU PC (Q35+ ICH9, 2009), BIOS 1.16.0-alt1 01/04/2014 [ 1010.715908] RIP: 0010:gtp_newlink+0x4d7/0x9c0 [gtp] [ 1010.715915] C\u00f3digo: 80 3c 02 00 0f 85 41 04 00 0 0 48 8b bb d8 05 00 00 e8 ed f6 ff ff 48 89 c2 48 89 c5 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 \u0026lt;80\u0026gt; 3c 02 00 0f 85 4f 04 00 00 4c 89 e2 4c 8b 6d 00 4 8b8 00 00 00 [ 1010.715920] RSP: 0018:ffff888020fbf180 EFLAGS: 00010203 [ 1010.715929] RAX: dffffc0000000000 RBX: ffff88800399c000 RCX: 0000000000000 000 [ 1010.715933] RDX: 00000000000000001 RSI: ffffffff84805280 RDI: 0000000000000282 [ 1010.715938] RBP: 000000000000000d R08: 000000000000 0001 R09: 0000000000000000 [ 1010.715942] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800399cc80 [ 1010.715947] R13: 0000000000000000 R14: 00000000000 00000 R15: 0000000000000400 [ 1010.715953] FS: 00007fd1509ab5c0(0000) GS:ffff88805b300000(0000) knlGS:0000000000000000 [ 1010.715958] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1010.715962] CR2: 0000000000000000 CR3: 000000001c07a000 CR4: 0000000000750ee0 [ 1010.715968] PKRU: 55555 554 [1010.715972] Seguimiento de llamadas: [1010.715985]? __die_body.cold+0x1a/0x1f [ 1010.715995] ? die_addr+0x43/0x70 [1010.716002]? exc_general_protection+0x199/0x2f0 [1010.716016]? asm_exc_general_protection+0x1e/0x30 [1010.716026]? gtp_newlink+0x4d7/0x9c0 [gtp] [ 1010.716034] ? gtp_net_exit+0x150/0x150 [gtp] [ 1010.716042] __rtnl_newlink+0x1063/0x1700 [ 1010.716051] ? rtnl_setlink+0x3c0/0x3c0 [1010.716063]? is_bpf_text_address+0xc0/0x1f0 [1010.716070]? kernel_text_address.part.0+0xbb/0xd0 [1010.716076]? __kernel_text_address+0x56/0xa0 [ 1010.716084] ? unwind_get_return_address+0x5a/0xa0 [1010.716091]? create_prof_cpu_mask+0x30/0x30 [1010.716098]? arch_stack_walk+0x9e/0xf0 [1010.716106]? stack_trace_save+0x91/0xd0 [1010.716113]? stack_trace_consume_entry+0x170/0x170 [1010.716121]? __lock_acquire+0x15c5/0x5380 [1010.716139]? mark_held_locks+0x9e/0xe0 [1010.716148]? \u00bfkmem_cache_alloc_trace+0x35f/0x3c0 [1010.716155]? __rtnl_newlink+0x1700/0x1700 [ 1010.716160] rtnl_newlink+0x69/0xa0 [ 1010.716166] rtnetlink_rcv_msg+0x43b/0xc50 [ 1010.716172] ? rtnl_fdb_dump+0x9f0/0x9f0 [1010.716179]? lock_acquire+0x1fe/0x560 [1010.716188]? netlink_deliver_tap+0x12f/0xd50 [ 1010.716196] netlink_rcv_skb+0x14d/0x440 [ 1010.716202] ? rtnl_fdb_dump+0x9f0/0x9f0 [1010.716208]? netlink_ack+0xab0/0xab0 [1010.716213]? netlink_deliver_tap+0x202/0xd50 [1010.716220]? netlink_deliver_tap+0x218/0xd50 [1010.716226]? __virt_addr_valid+0x30b/0x590 [ 1010.716233] netlink_unicast+0x54b/0x800 [ 1010.716240] ? netlink_attachskb+0x870/0x870 [1010.716248]? __check_object_size+0x2de/0x3b0 [ 1010.716254] netlink_sendmsg+0x938/0xe40 [ 1010.716261] ? netlink_unicast+0x800/0x800 [1010.716269]? __import_iovec+0x292/0x510 [ 1010.716276] ? netlink_unicast+0x800/0x800 [ 1010.716284] __sock_sendmsg+0x159/0x190 [ 1010.716290] ____sys_sendmsg+0x712/0x880 [ 1010.716297] ? sock_write_iter+0x3d0/0x3d0 [1010.716304]? __ia32_sys_recvmmsg+0x270/0x270 [1010.716309]? lock_acquire+0x1fe/0x560 [1010.716315]? Drain_array_locked+0x90/0x90 [ 1010.716324] ___sys_sendmsg+0xf8/0x170 [ 1010.716331] ? sendmsg_copy_msghdr+0x170/0x170 [1010.716337]? lockdep_init_map ---truncado---"
}
],
"id": "CVE-2024-26793",
"lastModified": "2026-08-04T11:17:05.470",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-26793",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-09-10T15:50:52.672497Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-04-04T09:15:08.620",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/01129059d5141d62fae692f7a336ae3bc712d3eb"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/5366969a19a8a0d2ffb3d27ef6e8905e5e4216f8"
},
{
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"Patch"
],
"url": "https://git.kernel.org/stable/c/616d82c3cfa2a2146dd7e3ae47bda7e877ee549e"
},
{
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"tags": [
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngtp: fix use-after-free and null-ptr-deref in gtp_newlink()\n\nThe gtp_link_ops operations structure for the subsystem must be\nregistered after registering the gtp_net_ops pernet operations structure.\n\nSyzkaller hit \u0027general protection fault in gtp_genl_dump_pdp\u0027 bug:\n\n[ 1010.702740] gtp: GTP module unloaded\n[ 1010.715877] general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] SMP KASAN NOPTI\n[ 1010.715888] KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]\n[ 1010.715895] CPU: 1 PID: 128616 Comm: a.out Not tainted 6.8.0-rc6-std-def-alt1 #1\n[ 1010.715899] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.0-alt1 04/01/2014\n[ 1010.715908] RIP: 0010:gtp_newlink+0x4d7/0x9c0 [gtp]\n[ 1010.715915] Code: 80 3c 02 00 0f 85 41 04 00 00 48 8b bb d8 05 00 00 e8 ed f6 ff ff 48 89 c2 48 89 c5 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 \u003c80\u003e 3c 02 00 0f 85 4f 04 00 00 4c 89 e2 4c 8b 6d 00 48 b8 00 00 00\n[ 1010.715920] RSP: 0018:ffff888020fbf180 EFLAGS: 00010203\n[ 1010.715929] RAX: dffffc0000000000 RBX: ffff88800399c000 RCX: 0000000000000000\n[ 1010.715933] RDX: 0000000000000001 RSI: ffffffff84805280 RDI: 0000000000000282\n[ 1010.715938] RBP: 000000000000000d R08: 0000000000000001 R09: 0000000000000000\n[ 1010.715942] R10: 0000000000000001 R11: 0000000000000001 R12: ffff88800399cc80\n[ 1010.715947] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000400\n[ 1010.715953] FS: 00007fd1509ab5c0(0000) GS:ffff88805b300000(0000) knlGS:0000000000000000\n[ 1010.715958] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 1010.715962] CR2: 0000000000000000 CR3: 000000001c07a000 CR4: 0000000000750ee0\n[ 1010.715968] PKRU: 55555554\n[ 1010.715972] Call Trace:\n[ 1010.715985] ? __die_body.cold+0x1a/0x1f\n[ 1010.715995] ? die_addr+0x43/0x70\n[ 1010.716002] ? exc_general_protection+0x199/0x2f0\n[ 1010.716016] ? asm_exc_general_protection+0x1e/0x30\n[ 1010.716026] ? gtp_newlink+0x4d7/0x9c0 [gtp]\n[ 1010.716034] ? gtp_net_exit+0x150/0x150 [gtp]\n[ 1010.716042] __rtnl_newlink+0x1063/0x1700\n[ 1010.716051] ? rtnl_setlink+0x3c0/0x3c0\n[ 1010.716063] ? is_bpf_text_address+0xc0/0x1f0\n[ 1010.716070] ? kernel_text_address.part.0+0xbb/0xd0\n[ 1010.716076] ? __kernel_text_address+0x56/0xa0\n[ 1010.716084] ? unwind_get_return_address+0x5a/0xa0\n[ 1010.716091] ? create_prof_cpu_mask+0x30/0x30\n[ 1010.716098] ? arch_stack_walk+0x9e/0xf0\n[ 1010.716106] ? stack_trace_save+0x91/0xd0\n[ 1010.716113] ? stack_trace_consume_entry+0x170/0x170\n[ 1010.716121] ? __lock_acquire+0x15c5/0x5380\n[ 1010.716139] ? mark_held_locks+0x9e/0xe0\n[ 1010.716148] ? kmem_cache_alloc_trace+0x35f/0x3c0\n[ 1010.716155] ? __rtnl_newlink+0x1700/0x1700\n[ 1010.716160] rtnl_newlink+0x69/0xa0\n[ 1010.716166] rtnetlink_rcv_msg+0x43b/0xc50\n[ 1010.716172] ? rtnl_fdb_dump+0x9f0/0x9f0\n[ 1010.716179] ? lock_acquire+0x1fe/0x560\n[ 1010.716188] ? netlink_deliver_tap+0x12f/0xd50\n[ 1010.716196] netlink_rcv_skb+0x14d/0x440\n[ 1010.716202] ? rtnl_fdb_dump+0x9f0/0x9f0\n[ 1010.716208] ? netlink_ack+0xab0/0xab0\n[ 1010.716213] ? netlink_deliver_tap+0x202/0xd50\n[ 1010.716220] ? netlink_deliver_tap+0x218/0xd50\n[ 1010.716226] ? __virt_addr_valid+0x30b/0x590\n[ 1010.716233] netlink_unicast+0x54b/0x800\n[ 1010.716240] ? netlink_attachskb+0x870/0x870\n[ 1010.716248] ? __check_object_size+0x2de/0x3b0\n[ 1010.716254] netlink_sendmsg+0x938/0xe40\n[ 1010.716261] ? netlink_unicast+0x800/0x800\n[ 1010.716269] ? __import_iovec+0x292/0x510\n[ 1010.716276] ? netlink_unicast+0x800/0x800\n[ 1010.716284] __sock_sendmsg+0x159/0x190\n[ 1010.716290] ____sys_sendmsg+0x712/0x880\n[ 1010.716297] ? sock_write_iter+0x3d0/0x3d0\n[ 1010.716304] ? __ia32_sys_recvmmsg+0x270/0x270\n[ 1010.716309] ? lock_acquire+0x1fe/0x560\n[ 1010.716315] ? drain_array_locked+0x90/0x90\n[ 1010.716324] ___sys_sendmsg+0xf8/0x170\n[ 1010.716331] ? sendmsg_copy_msghdr+0x170/0x170\n[ 1010.716337] ? lockdep_init_map\n---truncated---"
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"value": "AV:L - The vulnerability is triggered by an `RTM_NEWLINK` rtnetlink message with `IFLA_INFO_KIND=\"gtp\"` sent over an `AF_NETLINK` socket via `sendmsg()`, which requires local system access. There is no remote or adjacent-network path into `gtp_newlink()`.\nAC:L - The attacker creates and controls both sides of the race \u2014 one thread\u0027s own `RTM_NEWLINK` triggers `request_module(\"rtnl-link-gtp\")` while sibling threads block on `rtnl_lock` inside `__rtnl_newlink()`, and `rtnl_link_register()` releasing that lock inside `gtp_init()` hands a waiter the lock before `register_pernet_subsys()` completes. Syzkaller reproduced it from an ordinary userspace binary, and the same inverted ordering is also hit deterministically on the module-init error path.\nPR:L - `rtnetlink_rcv_msg()` only requires `netlink_net_capable(skb, CAP_NET_ADMIN)`, which is evaluated against the socket\u0027s `net-\u003euser_ns`, so an unprivileged user obtains it with `unshare -Urn`. Module autoload via `request_module()` in `__rtnl_newlink()` adds no further capability gate, so no real root is needed.\nUI:N - The attacker performs the entire sequence \u2014 autoload trigger plus racing link-creation requests \u2014 from their own threads. No victim action or pre-existing system state is required.\nS:U - The corruption stays within the kernel\u0027s own memory and security authority; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - `ops_free_list()` frees the per-net `struct gtp_net` without clearing `ng-\u003eptr[id]`, so `net_generic()` returns a dangling pointer whose reused slab contents are read as a list head and subsequently walked and marshalled to userspace by `gtp_genl_dump_pdp()`, giving a use-after-free read primitive over adjacent kernel heap data.\nI:H - `__list_add_rcu()` performs `next-\u003eprev = new` where `next` is read from the freed/garbage `gn-\u003egtp_dev_list`, so an attacker who sprays the reallocated 16-byte object controls the destination and writes a kernel heap pointer to an arbitrary address \u2014 a write primitive suitable for control-flow hijacking.\nA:H - The unfixed path reliably produces a general protection fault / null-pointer dereference in `gtp_newlink()` (the reported oops), and the use-after-free variant corrupts the slab, both resulting in kernel crashes."
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"title": "gtp: fix use-after-free and null-ptr-deref in gtp_newlink()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-26793",
"datePublished": "2024-04-04T08:20:23.771Z",
"dateReserved": "2024-02-19T14:20:24.178Z",
"dateUpdated": "2026-08-05T11:27:17.339Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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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.
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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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