{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2024-36979",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2024-05-30T15:25:07.082Z",
"datePublished": "2024-06-19T13:35:12.708Z",
"dateUpdated": "2026-05-11T20:18:22.377Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-11T20:18:22.377Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: mst: fix vlan use-after-free\n\nsyzbot reported a suspicious rcu usage[1] in bridge's mst code. While\nfixing it I noticed that nothing prevents a vlan to be freed while\nwalking the list from the same path (br forward delay timer). Fix the rcu\nusage and also make sure we are not accessing freed memory by making\nbr_mst_vlan_set_state use rcu read lock.\n\n[1]\n WARNING: suspicious RCU usage\n 6.9.0-rc6-syzkaller #0 Not tainted\n -----------------------------\n net/bridge/br_private.h:1599 suspicious rcu_dereference_protected() usage!\n ...\n stack backtrace:\n CPU: 1 PID: 8017 Comm: syz-executor.1 Not tainted 6.9.0-rc6-syzkaller #0\n Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\n Call Trace:\n \n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\n lockdep_rcu_suspicious+0x221/0x340 kernel/locking/lockdep.c:6712\n nbp_vlan_group net/bridge/br_private.h:1599 [inline]\n br_mst_set_state+0x1ea/0x650 net/bridge/br_mst.c:105\n br_set_state+0x28a/0x7b0 net/bridge/br_stp.c:47\n br_forward_delay_timer_expired+0x176/0x440 net/bridge/br_stp_timer.c:88\n call_timer_fn+0x18e/0x650 kernel/time/timer.c:1793\n expire_timers kernel/time/timer.c:1844 [inline]\n __run_timers kernel/time/timer.c:2418 [inline]\n __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2429\n run_timer_base kernel/time/timer.c:2438 [inline]\n run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2448\n __do_softirq+0x2c6/0x980 kernel/softirq.c:554\n invoke_softirq kernel/softirq.c:428 [inline]\n __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633\n irq_exit_rcu+0x9/0x30 kernel/softirq.c:645\n instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]\n sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043\n \n \n asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702\n RIP: 0010:lock_acquire+0x264/0x550 kernel/locking/lockdep.c:5758\n Code: 2b 00 74 08 4c 89 f7 e8 ba d1 84 00 f6 44 24 61 02 0f 85 85 01 00 00 41 f7 c7 00 02 00 00 74 01 fb 48 c7 44 24 40 0e 36 e0 45 <4b> c7 44 25 00 00 00 00 00 43 c7 44 25 09 00 00 00 00 43 c7 44 25\n RSP: 0018:ffffc90013657100 EFLAGS: 00000206\n RAX: 0000000000000001 RBX: 1ffff920026cae2c RCX: 0000000000000001\n RDX: dffffc0000000000 RSI: ffffffff8bcaca00 RDI: ffffffff8c1eaa60\n RBP: ffffc90013657260 R08: ffffffff92efe507 R09: 1ffffffff25dfca0\n R10: dffffc0000000000 R11: fffffbfff25dfca1 R12: 1ffff920026cae28\n R13: dffffc0000000000 R14: ffffc90013657160 R15: 0000000000000246"
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/bridge/br_mst.c"
],
"versions": [
{
"version": "ec7328b59176227216c461601c6bd0e922232a9b",
"lessThan": "8ca9a750fc711911ef616ceb627d07357b04545e",
"status": "affected",
"versionType": "git"
},
{
"version": "ec7328b59176227216c461601c6bd0e922232a9b",
"lessThan": "4488617e5e995a09abe4d81add5fb165674edb59",
"status": "affected",
"versionType": "git"
},
{
"version": "ec7328b59176227216c461601c6bd0e922232a9b",
"lessThan": "a2b01e65d9ba8af2bb086d3b7288ca53a07249ac",
"status": "affected",
"versionType": "git"
},
{
"version": "ec7328b59176227216c461601c6bd0e922232a9b",
"lessThan": "e43dd2b1ec746e105b7db5f9ad6ef14685a615a4",
"status": "affected",
"versionType": "git"
},
{
"version": "ec7328b59176227216c461601c6bd0e922232a9b",
"lessThan": "3a7c1661ae1383364cd6092d851f5e5da64d476b",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"net/bridge/br_mst.c"
],
"versions": [
{
"version": "5.18",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.18",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.93",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.33",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.8.12",
"lessThanOrEqual": "6.8.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.9.3",
"lessThanOrEqual": "6.9.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.10",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.18",
"versionEndExcluding": "6.1.93"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.18",
"versionEndExcluding": "6.6.33"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.18",
"versionEndExcluding": "6.8.12"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.18",
"versionEndExcluding": "6.9.3"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.18",
"versionEndExcluding": "6.10"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/8ca9a750fc711911ef616ceb627d07357b04545e"
},
{
"url": "https://git.kernel.org/stable/c/4488617e5e995a09abe4d81add5fb165674edb59"
},
{
"url": "https://git.kernel.org/stable/c/a2b01e65d9ba8af2bb086d3b7288ca53a07249ac"
},
{
"url": "https://git.kernel.org/stable/c/e43dd2b1ec746e105b7db5f9ad6ef14685a615a4"
},
{
"url": "https://git.kernel.org/stable/c/3a7c1661ae1383364cd6092d851f5e5da64d476b"
}
],
"title": "net: bridge: mst: fix vlan use-after-free",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2024-06-24T15:36:13.939816Z",
"id": "CVE-2024-36979",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2024-06-24T15:36:22.198Z"
}
},
{
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2024-08-02T03:43:50.547Z"
},
"title": "CVE Program Container",
"references": [
{
"url": "https://git.kernel.org/stable/c/8ca9a750fc711911ef616ceb627d07357b04545e",
"tags": [
"x_transferred"
]
},
{
"url": "https://git.kernel.org/stable/c/4488617e5e995a09abe4d81add5fb165674edb59",
"tags": [
"x_transferred"
]
},
{
"url": "https://git.kernel.org/stable/c/a2b01e65d9ba8af2bb086d3b7288ca53a07249ac",
"tags": [
"x_transferred"
]
},
{
"url": "https://git.kernel.org/stable/c/e43dd2b1ec746e105b7db5f9ad6ef14685a615a4",
"tags": [
"x_transferred"
]
},
{
"url": "https://git.kernel.org/stable/c/3a7c1661ae1383364cd6092d851f5e5da64d476b",
"tags": [
"x_transferred"
]
}
]
}
]
}
}