CVE-2026-53381
Estado: AnalizadaAlta (7.8)—
In the Linux kernel, the following vulnerability has been resolved:
virtiofs: fix UAF on submount umount
iput() called from fuse_release_end() can Oops if the super block has already been destroyed. Normally this is prevented by waiting for num_waiting to go down to zero before commencing with super block shutdown.
This only works, however, for the last submount instance, as the wait counter is per connection, not per superblock.
Revert to using synchronous release requests for the auto_submounts case, which is virtiofs only at this time.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.14%
- Percentil entre todas las CVEs puntuadas: 3
- Fecha de la puntuación: 4/10/2026
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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation85 % - Impacto principal
T1499.004Application or System Exploitationimpact80 %
CWE-416 (Use-After-Free) en kernel Linux con acceso local (AV:L) y privilegios elevados (PR:L) permite DoS; iput() causa Oops (caída del sistema) en submount umount.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-416
Referencias
- https://git.kernel.org/stable/c/06b41351779e9289e8785694ade9042ae85e41ea
- https://git.kernel.org/stable/c/0b809199ff87c44487e516a725dd4be2185712ce
- https://git.kernel.org/stable/c/1cc0e3a0c6499aaaa2f21a4fcbba388486afb25e
- https://git.kernel.org/stable/c/2181a09ba980f142650fb053666350ead4471cfe
- https://git.kernel.org/stable/c/2abfd3ffbd9452f72535d96ff3982b3ab1f8f2f9
- https://git.kernel.org/stable/c/39a2b95e008665c14f84e50ed411d898df7cd11b
- https://git.kernel.org/stable/c/607a1d4c42f649e6197567c0448fd9ebb316cd42
- https://git.kernel.org/stable/c/97c4691653d145dcc699eca5d3aba3219a520f1f
- https://git.kernel.org/stable/c/e09412a714bcd49375198427bb4aa005037a9d6f
JSON original (NVD)
Mostrar
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