CVE-2026-98388
Estado: RecibidaSin puntuar—
Gravedad—Sin puntuar
Probabilidad de explotación0.22 %mayor que el 12 % de las CVE
Explotación activaNono figura en el catálogo de CISA
Exploit públicoNo conocidosin código público localizado
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:
exec: do_close_on_exec() antes de tomar exec_update_lock
Actualmente, do_close_on_exec() se ejecuta mientras se mantiene exec_update_lock, un bloqueo que se usa en muchos puntos que acceden al estado de los procesos para sincronizar las comprobaciones de acceso. Recientemente añadí otro uso de exec_update_lock, lo que causó una regresión.
do_close_on_exec() puede bloquearse esperando una respuesta de un sistema de ficheros. Eso significa que un sistema de ficheros bloqueado puede bloquear las rutas de código que usan exec_update_lock; y también significa que un sistema de ficheros FUSE que intente inspeccionar el proceso que realiza la llamada puede provocar un interbloqueo.
Leer descripción completaMostrar menos
Para evitar estos problemas, se mueve do_close_on_exec() antes de que se tome exec_update_lock, pero después de que la tabla de descriptores de fichero se haya copiado, si es necesario.
He revisado todas las llamadas entre la posición antigua y la nueva de la llamada a do_close_on_exec(); parece que no hay acceso a la tabla de descriptores de fichero entre ellas.
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
- 0.22 %
- Percentil entre todas las CVEs puntuadas
- 12
- Fecha de la puntuación
- 21/10/2026
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 8 referencias
- https://git.kernel.org/stable/c/0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53
- https://git.kernel.org/stable/c/19ddef61ee0a49782a60f8f497e50597ad5de2da
- https://git.kernel.org/stable/c/3feb4020bfb7ccf0d347f27051639d25e19cd65d
- https://git.kernel.org/stable/c/550feab5b01000ab314868b62211fb3ddfd600e8
- https://git.kernel.org/stable/c/5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38
- https://git.kernel.org/stable/c/63be3d8511bdafa095cd14a393cbf3c58dbbb928
- https://git.kernel.org/stable/c/955973fff4a36d39a848b00cac1706863f568fe1
- https://git.kernel.org/stable/c/e780259b54e618ceb4763fbc21314acf3565e813
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-98388",
"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": "ae1e630bcaac739f625822078edbaea98366930d",
"lessThan": "955973fff4a36d39a848b00cac1706863f568fe1",
"versionType": "git"
},
{
"status": "affected",
"version": "d54f14655fd7d7b293698a8b6918563c4c0465e7",
"lessThan": "550feab5b01000ab314868b62211fb3ddfd600e8",
"versionType": "git"
},
{
"status": "affected",
"version": "bb43679356f1f2a4c6b1c88aec4f021e5b5c74e9",
"lessThan": "5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38",
"versionType": "git"
},
{
"status": "affected",
"version": "7456ae990a9738962b33146916fabca62ae3d4e0",
"lessThan": "3feb4020bfb7ccf0d347f27051639d25e19cd65d",
"versionType": "git"
},
{
"status": "affected",
"version": "4bfe8c481846cee52473a2f7d7b30ee8e6749fc4",
"lessThan": "0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53",
"versionType": "git"
},
{
"status": "affected",
"version": "f9b4b03ccc9c69bf7f7298d4559906ebea7143b3",
"lessThan": "19ddef61ee0a49782a60f8f497e50597ad5de2da",
"versionType": "git"
},
{
"status": "affected",
"version": "6650527444dadc63d84aa939d14ecba4fadb2f69",
"lessThan": "63be3d8511bdafa095cd14a393cbf3c58dbbb928",
"versionType": "git"
},
{
"status": "affected",
"version": "6650527444dadc63d84aa939d14ecba4fadb2f69",
"lessThan": "e780259b54e618ceb4763fbc21314acf3565e813",
"versionType": "git"
},
{
"status": "affected",
"version": "c1cfd63326f5d09999134e9052c353faf738286e",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.261",
"lessThan": "5.10.271",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.212",
"lessThan": "5.15.222",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.178",
"lessThan": "6.1.189",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.145",
"lessThan": "6.6.158",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.97",
"lessThan": "6.12.111",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.40",
"lessThan": "6.18.53",
"versionType": "semver"
},
{
"status": "affected",
"version": "7.1.4",
"lessThan": "7.2",
"versionType": "semver"
}
],
"programFiles": [
"fs/exec.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.2"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/exec.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-10-14T14:17:49.617",
"references": [
{
"url": "https://git.kernel.org/stable/c/0d86cd6b709c39216e6ee5ea8f0fc4242bbb2b53",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/19ddef61ee0a49782a60f8f497e50597ad5de2da",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3feb4020bfb7ccf0d347f27051639d25e19cd65d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/550feab5b01000ab314868b62211fb3ddfd600e8",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5aacc19ba2b1faf84c4a2f2cf9a1784e03d1ff38",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/63be3d8511bdafa095cd14a393cbf3c58dbbb928",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/955973fff4a36d39a848b00cac1706863f568fe1",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e780259b54e618ceb4763fbc21314acf3565e813",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nexec: do_close_on_exec() before taking exec_update_lock\n\ndo_close_on_exec() currently happens while holding the exec_update_lock,\nwhich is used in a lot of places that access process state to\nsynchronize access checks.\nI recently added another such use of exec_update_lock, causing a\nregression.\n\ndo_close_on_exec() can block waiting for a reply from a filesystem.\nThat means a hung filesystem can block codepaths that use\nexec_update_lock; and it also means that a FUSE filesystem which\nattempts to inspect the calling process can deadlock.\n\nTo avoid such problems, move do_close_on_exec() before the\nexec_update_lock is taken, but after the FD table has been copied if\nnecessary.\n\nI have looked through all the calls between the old and new position of\nthe do_close_on_exec() call; there seems to be no file descriptor table\naccess in between."
}
],
"lastModified": "2026-10-19T10:18:42.120",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}