CVE-2025-21772
Estado: ModificadaAlta (7.8)—
In the Linux kernel, the following vulnerability has been resolved:
partitions: mac: fix handling of bogus partition table
Fix several issues in partition probing:
Detalles técnicos trazas, registros y código del informe original
- The bailout for a bad partoffset must use put_dev_sector(), since the preceding read_part_sector() succeeded. - If the partition table claims a silly sector size like 0xfff bytes (which results in partition table entries straddling sector boundaries), bail out instead of accessing out-of-bounds memory. - We must not assume that the partition table contains proper NUL termination - use strnlen() and strncmp() instead of strlen() and strcmp().
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: 0.24%
- Percentil entre todas las CVEs puntuadas: 14
- Fecha de la puntuación: 6/10/2026
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 %
Vulnerabilidad CWE-787 (buffer overflow) en el kernel Linux con acceso local (AV:L) y sin interacción requerida (UI:N); permite escalada de privilegios. El desbordamiento en la tabla de particiones MAC puede ejecutar código arbitrario con privilegios elevados.
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-787
Referencias
- https://git.kernel.org/stable/c/213ba5bd81b7e97ac6e6190b8f3bc6ba76123625
- https://git.kernel.org/stable/c/27a39d006f85e869be68c1d5d2ce05e5d6445bf5
- https://git.kernel.org/stable/c/40a35d14f3c0dc72b689061ec72fc9b193f37d1f
- https://git.kernel.org/stable/c/6578717ebca91678131d2b1f4ba4258e60536e9f
- https://git.kernel.org/stable/c/7fa9706722882f634090bfc9af642bf9ed719e27
- https://git.kernel.org/stable/c/80e648042e512d5a767da251d44132553fe04ae0
- https://git.kernel.org/stable/c/92527100be38ede924768f4277450dfe8a40e16b
- https://git.kernel.org/stable/c/a3e77da9f843e4ab93917d30c314f0283e28c124
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
JSON original (NVD)
Mostrar
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