CVE-2026-74335
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix NULL pointer dereference in bpf_task_from_vpid()
bpf_task_from_vpid() looks up a task in the pid namespace of the current task, via find_task_by_vpid():
cgroup_skb programs run in softirq, which may interrupt a task that is itself in do_exit(). Once that task has passed exit_notify() -> release_task() -> __unhash_process(), its thread_pid is cleared, so task_active_pid_ns(current) returns NULL and find_pid_ns() dereferences &NULL->idr:
Bail out when current has no pid namespace.
Detalles técnicos trazas, registros y código del informe original
find_task_by_vpid(vpid)
find_task_by_pid_ns(vpid, task_active_pid_ns(current))
find_pid_ns(nr, ns) -> idr_find(&ns->idr, nr)
BUG: kernel NULL pointer dereference, address: 0000000000000050
RIP: 0010:idr_find+0x11/0x30 lib/idr.c:176
Call Trace:
<IRQ>
find_pid_ns kernel/pid.c:370 [inline]
find_task_by_pid_ns+0x3b/0xe0 kernel/pid.c:485
bpf_task_from_vpid+0x5b/0x200 kernel/bpf/helpers.c:2916
bpf_prog_run_array_cg+0x17e/0x530 kernel/bpf/cgroup.c:81
__cgroup_bpf_run_filter_skb+0x12b/0x250 kernel/bpf/cgroup.c:1612
sk_filter_trim_cap+0x1dc/0x4c0 net/core/filter.c:148
tcp_v4_rcv+0x18d1/0x2200 net/ipv4/tcp_ipv4.c:2223
</IRQ>
<TASK>
do_exit+0xa63/0x1270 kernel/exit.c:1010
get_signal+0x141c/0x1530 kernel/signal.c:3037CVSS
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: 5/10/2026
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-2026-74335",
"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": "675c3596ff32c040d1dd2e28dd57e83e634b9f60",
"lessThan": "b7474f4432dd9559ada03b01a8cd3472cd02c61d",
"versionType": "git"
},
{
"status": "affected",
"version": "675c3596ff32c040d1dd2e28dd57e83e634b9f60",
"lessThan": "a4c95b6221cb2972a94ed72663c09bd5b0b6dea4",
"versionType": "git"
},
{
"status": "affected",
"version": "675c3596ff32c040d1dd2e28dd57e83e634b9f60",
"lessThan": "50dff00615522f3ec03449680ca23beb4cfc549c",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/helpers.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/helpers.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-15T06:22:34.393",
"references": [
{
"url": "https://git.kernel.org/stable/c/50dff00615522f3ec03449680ca23beb4cfc549c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a4c95b6221cb2972a94ed72663c09bd5b0b6dea4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/b7474f4432dd9559ada03b01a8cd3472cd02c61d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix NULL pointer dereference in bpf_task_from_vpid()\n\nbpf_task_from_vpid() looks up a task in the pid namespace of the\ncurrent task, via find_task_by_vpid():\n\n find_task_by_vpid(vpid)\n find_task_by_pid_ns(vpid, task_active_pid_ns(current))\n find_pid_ns(nr, ns) -> idr_find(&ns->idr, nr)\n\ncgroup_skb programs run in softirq, which may interrupt a task that is\nitself in do_exit(). Once that task has passed\nexit_notify() -> release_task() -> __unhash_process(), its thread_pid is\ncleared, so task_active_pid_ns(current) returns NULL and find_pid_ns()\ndereferences &NULL->idr:\n\n BUG: kernel NULL pointer dereference, address: 0000000000000050\n RIP: 0010:idr_find+0x11/0x30 lib/idr.c:176\n Call Trace:\n <IRQ>\n find_pid_ns kernel/pid.c:370 [inline]\n find_task_by_pid_ns+0x3b/0xe0 kernel/pid.c:485\n bpf_task_from_vpid+0x5b/0x200 kernel/bpf/helpers.c:2916\n bpf_prog_run_array_cg+0x17e/0x530 kernel/bpf/cgroup.c:81\n __cgroup_bpf_run_filter_skb+0x12b/0x250 kernel/bpf/cgroup.c:1612\n sk_filter_trim_cap+0x1dc/0x4c0 net/core/filter.c:148\n tcp_v4_rcv+0x18d1/0x2200 net/ipv4/tcp_ipv4.c:2223\n </IRQ>\n <TASK>\n do_exit+0xa63/0x1270 kernel/exit.c:1010\n get_signal+0x141c/0x1530 kernel/signal.c:3037\n\nBail out when current has no pid namespace."
}
],
"lastModified": "2026-08-17T06:19:27.990",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}