CVE-2024-47723
Estado: ModificadaAlta (7.1)—
In the Linux kernel, the following vulnerability has been resolved:
jfs: fix out-of-bounds in dbNextAG() and diAlloc()
In dbNextAG() , there is no check for the case where bmp->db_numag is greater or same than MAXAG due to a polluted image, which causes an out-of-bounds. Therefore, a bounds check should be added in dbMount().
And in dbNextAG(), a check for the case where agpref is greater than bmp->db_numag should be added, so an out-of-bounds exception should be prevented.
Additionally, a check for the case where agno is greater or same than MAXAG should be added in diAlloc() to prevent out-of-bounds.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Puntuación base: 7.1
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.29%
- Percentil entre todas las CVEs puntuadas: 19
- 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 Interpreterexecution60 % - Impacto secundario
T1499Endpoint Denial of Serviceimpact75 %
AV:L, PR:L, UI:N indica escalada local sin interacción. Out-of-bounds en kernel JFS permite ejecución de código o DoS (crash) con privilegios elevados. CWE-125 (lectura fuera de límites) y falta de bounds checks sustentan ambos impactos.
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-125
Referencias
- https://git.kernel.org/stable/c/0338e66cba272351ca9d7d03f3628e390e70963b
- https://git.kernel.org/stable/c/128d5cfdcf844cb690c9295a3a1c1114c21fc15a
- https://git.kernel.org/stable/c/5ad6284c8d433f8a213111c5c44ead4d9705b622
- https://git.kernel.org/stable/c/6ce8b6ab44a8b5918c0ee373d4ad19d19017931b
- https://git.kernel.org/stable/c/96855f40e152989c9e7c20c4691ace5581098acc
- https://git.kernel.org/stable/c/c1ba4b8ca799ff1d99d01f37d7ccb7d5ba5533d2
- https://git.kernel.org/stable/c/d1017d2a0f3f16dc1db5120e7ddbe7c6680425b0
- https://git.kernel.org/stable/c/e63866a475562810500ea7f784099bfe341e761a
- https://git.kernel.org/stable/c/ead82533278502428883085a787d5a00f15e5eb9
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\njfs: fix out-of-bounds in dbNextAG() and diAlloc()\n\nIn dbNextAG() , there is no check for the case where bmp->db_numag is\ngreater or same than MAXAG due to a polluted image, which causes an\nout-of-bounds. Therefore, a bounds check should be added in dbMount().\n\nAnd in dbNextAG(), a check for the case where agpref is greater than\nbmp->db_numag should be added, so an out-of-bounds exception should be\nprevented.\n\nAdditionally, a check for the case where agno is greater or same than\nMAXAG should be added in diAlloc() to prevent out-of-bounds."
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