CVE-2026-93173
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
bpf,lsm: Drop bpf_prog_free from sleepable_lsm_hooks
__bpf_prog_put_rcu() is the call_rcu() callback for non-sleepable programs. security_bpf_prog_free() called from there fires bpf_prog_free in softirq; if a sleepable LSM prog is attached to that hook, might_fault() BUGs:
The call_rcu/call_rcu_tasks_trace split reflects the freed program's sleepability, not that of any attached observer.
security_bpf_prog_free() also frees prog->aux->security, which has to stay after the grace period, so drop bpf_prog_free from sleepable_lsm_hooks rather than move the call. Non-sleepable observers still run there.
Detalles técnicos trazas, registros y código del informe original
BUG: sleeping function called from invalid context in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5038 preempt_count: 101, expected: 0 Call Trace: <IRQ> __bpf_prog_enter_sleepable+0x1cd/0x320 kernel/bpf/trampoline.c:1255 bpf_trampoline_6442549705+0x53/0xd7 security_bpf_prog_free+0xde/0x130 security/security.c:5465 __bpf_prog_put_rcu+0xab/0xd0 kernel/bpf/syscall.c:2365 rcu_do_batch kernel/rcu/tree.c:2617 [inline] handle_softirqs+0x236/0x800 kernel/softirq.c:622 </IRQ>
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-93173",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "1b67772e4e3f16cd647b229cae95fc06d120be08",
"lessThan": "2135f661fae7160a7fc603cab43cbc7999e8bfce",
"versionType": "git"
},
{
"status": "affected",
"version": "1b67772e4e3f16cd647b229cae95fc06d120be08",
"lessThan": "d5f2f741a900123fbcb7c7c0a002b81306fbe242",
"versionType": "git"
},
{
"status": "affected",
"version": "1b67772e4e3f16cd647b229cae95fc06d120be08",
"lessThan": "915c2d9d69fc6c5f9f41d12bf4a9c51293aaee62",
"versionType": "git"
},
{
"status": "affected",
"version": "1b67772e4e3f16cd647b229cae95fc06d120be08",
"lessThan": "2ce3f548cfc6a1fe4c53479cf8a21931cdfd51d8",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/bpf_lsm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/bpf_lsm.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-17T17:18:13.057",
"references": [
{
"url": "https://git.kernel.org/stable/c/2135f661fae7160a7fc603cab43cbc7999e8bfce",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/2ce3f548cfc6a1fe4c53479cf8a21931cdfd51d8",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/915c2d9d69fc6c5f9f41d12bf4a9c51293aaee62",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d5f2f741a900123fbcb7c7c0a002b81306fbe242",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf,lsm: Drop bpf_prog_free from sleepable_lsm_hooks\n\n__bpf_prog_put_rcu() is the call_rcu() callback for non-sleepable programs.\nsecurity_bpf_prog_free() called from there fires bpf_prog_free in softirq;\nif a sleepable LSM prog is attached to that hook, might_fault() BUGs:\n\n BUG: sleeping function called from invalid context\n in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 5038\n preempt_count: 101, expected: 0\n Call Trace:\n <IRQ>\n __bpf_prog_enter_sleepable+0x1cd/0x320 kernel/bpf/trampoline.c:1255\n bpf_trampoline_6442549705+0x53/0xd7\n security_bpf_prog_free+0xde/0x130 security/security.c:5465\n __bpf_prog_put_rcu+0xab/0xd0 kernel/bpf/syscall.c:2365\n rcu_do_batch kernel/rcu/tree.c:2617 [inline]\n handle_softirqs+0x236/0x800 kernel/softirq.c:622\n </IRQ>\n\nThe call_rcu/call_rcu_tasks_trace split reflects the freed program's\nsleepability, not that of any attached observer.\n\nsecurity_bpf_prog_free() also frees prog->aux->security, which has to stay\nafter the grace period, so drop bpf_prog_free from sleepable_lsm_hooks\nrather than move the call. Non-sleepable observers still run there."
}
],
"lastModified": "2026-09-17T17:18:13.057",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}