CVE-2026-98790
En el kernel de Linux se ha resuelto la siguiente vulnerabilidad:
perf: Corregir la condición de carrera entre perf_event_exit_task() y perf_pending_task()
Existe una condición de carrera entre perf_event_exit_task() y perf_pending_task() durante begin_new_exec().
Durante begin_new_exec(), es posible que se llame a perf_event_exit_task(), y el indicador PF_EXITING no está activado en la tarea. Por tanto, perf_sigtrap() continúa ejecutándose y activa WARN_ON_ONCE(event->ctx->task != current).
Dado que tanto la salida de la tarea como las rutas de exec pueden llamar a perf_event_exit_task(), lo cual establece ctx->task a TASK_TOMBSTONE, se corrige comprobando explícitamente si event->ctx->task es igual a TASK_TOMBSTONE y eliminando la comprobación redundante de PF_EXITING.
Traducción automática del texto original de NVD (en inglés).
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
- 0.17 %
- Percentil entre todas las CVEs puntuadas
- 6
- Fecha de la puntuación
- 20/10/2026
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
Mostrar las 4 referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-98790",
"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": "97ba62b278674293762c3d91f724f1bb922f04e0",
"lessThan": "672b8a9ce8f51b991481dfde26fba5cc4340a91a",
"versionType": "git"
},
{
"status": "affected",
"version": "97ba62b278674293762c3d91f724f1bb922f04e0",
"lessThan": "524063fea29f8a841e49927ea7a8085194ad3ec2",
"versionType": "git"
},
{
"status": "affected",
"version": "97ba62b278674293762c3d91f724f1bb922f04e0",
"lessThan": "81e61e3f8befa1bae3ec8e779d8ada5e5e362c21",
"versionType": "git"
},
{
"status": "affected",
"version": "97ba62b278674293762c3d91f724f1bb922f04e0",
"lessThan": "ffb684f2aa141eeb0caa6308422e7e05d1ded7c4",
"versionType": "git"
}
],
"programFiles": [
"kernel/events/core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/events/core.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-18T16:17:32.987",
"references": [
{
"url": "https://git.kernel.org/stable/c/524063fea29f8a841e49927ea7a8085194ad3ec2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/672b8a9ce8f51b991481dfde26fba5cc4340a91a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/81e61e3f8befa1bae3ec8e779d8ada5e5e362c21",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ffb684f2aa141eeb0caa6308422e7e05d1ded7c4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf: Fix race between perf_event_exit_task() and perf_pending_task()\n\nA race condition exists between perf_event_exit_task() and\nperf_pending_task() during begin_new_exec().\n\nDuring begin_new_exec(), perf_event_exit_task() may be called, and the\nPF_EXITING flag is not set on task. So perf_sigtrap() continues to execute\nand triggers WARN_ON_ONCE(event->ctx->task != current).\n\nSince both task exit and exec paths can call perf_event_exit_task() which\nsets ctx->task to TASK_TOMBSTONE, fix this by explicitly checking if\nevent->ctx->task equals TASK_TOMBSTONE and dropping the redundant\nPF_EXITING check."
}
],
"lastModified": "2026-10-19T10:19:43.050",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}