CVE-2025-39841
Estado: ModificadaAlta (7.8)—
In the Linux kernel, the following vulnerability has been resolved:
scsi: lpfc: Fix buffer free/clear order in deferred receive path
Fix a use-after-free window by correcting the buffer release sequence in the deferred receive path. The code freed the RQ buffer first and only then cleared the context pointer under the lock. Concurrent paths (e.g., ABTS and the repost path) also inspect and release the same pointer under the lock, so the old order could lead to double-free/UAF.
Note that the repost path already uses the correct pattern: detach the pointer under the lock, then free it after dropping the lock. The deferred path should do the same.
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: 0.47%
- Percentil entre todas las CVEs puntuadas: 38
- 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).
🎯 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
T1059Command and Scripting Interpreterexecution75 %
Acceso local (AV:L, PR:L) sin interacción permite escalada via use-after-free en kernel SCSI. Ejecución de código resultante tras ganar privilegios.
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 (2)
CWE
- CWE-787
Referencias
- https://git.kernel.org/stable/c/367cb5ffd8a8a4c85dc89f55e7fa7cc191425b11
- https://git.kernel.org/stable/c/55658c7501467ca9ef3bd4453dd920010db8bc13
- https://git.kernel.org/stable/c/897f64b01c1249ac730329b83f4f40bab71e86c7
- https://git.kernel.org/stable/c/95b63d15fce5c54a73bbf195e1aacb5a75b128e2
- https://git.kernel.org/stable/c/9dba9a45c348e8460da97c450cddf70b2056deb3
- https://git.kernel.org/stable/c/ab34084f42ee06a9028d67c78feafb911d33d111
- https://git.kernel.org/stable/c/baa39f6ad79d372a6ce0aa639fbb2f1578479f57
- https://git.kernel.org/stable/c/d96cc9a1b57725930c60b607423759d563b4d900
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
- https://cert-portal.siemens.com/productcert/html/ssa-032379.html
- https://cert-portal.siemens.com/productcert/html/ssa-089022.html
JSON original (NVD)
Mostrar
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