CVE-2023-52699
Estado: AnalizadaMedia (5.3)—
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: sysv: no llame a sb_bread() con pointers_lock retenido syzbot informa suspensión en contexto atómico en el sistema de archivos SysV [1], porque sb_bread() se llama con rw_spinlock retenido. Un error "write_lock(&pointers_lock) => read_lock(&pointers_lock) deadlock" y un error "sb_bread() with write_lock(&pointers_lock)" fueron introducidos por "Reemplazar BKL para bloqueo de cadena con sysvfs-private rwlock" en Linux 2.5.12.
Leer descripción completaMostrar menos
Luego, "[PATCH] err1-40: corrección de bloqueo de sysvfs" en Linux 2.6.8 solucionó el error anterior moviendo el bloqueo pointers_lock a las personas que llaman, pero en su lugar introdujo un error "sb_bread() con read_lock(&pointers_lock)" (que hizo que esto problema más fácil de abordar). Al Viro sugirió que por qué no hacer lo que hace get_branch()/get_block()/find_shared() en el sistema de archivos Minix. Y hacer eso es casi una reversión de "[PATCH] err1-40: corrección de bloqueo de sysvfs", excepto que get_branch() de find_shared() se llama sin write_lock(&pointers_lock).
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Puntuación base: 5.3
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.97%
- Percentil entre todas las CVEs puntuadas: 61
- Fecha de la puntuación: 8/10/2026
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 (2)
CWE
- CWE-667
Referencias
- https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76
- https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f
- https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09
- https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1
- https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac
- https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3
- https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31e
- https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927
- https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76
- https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f
- https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09
- https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1
- https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac
- https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3
- https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31e
- https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
JSON original (NVD)
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"value": "En el kernel de Linux, se resolvió la siguiente vulnerabilidad: sysv: no llame a sb_bread() con pointers_lock retenido syzbot informa suspensión en contexto atómico en el sistema de archivos SysV [1], porque sb_bread() se llama con rw_spinlock retenido. Un error \"write_lock(&pointers_lock) => read_lock(&pointers_lock) deadlock\" y un error \"sb_bread() with write_lock(&pointers_lock)\" fueron introducidos por \"Reemplazar BKL para bloqueo de cadena con sysvfs-private rwlock\" en Linux 2.5.12. Luego, \"[PATCH] err1-40: corrección de bloqueo de sysvfs\" en Linux 2.6.8 solucionó el error anterior moviendo el bloqueo pointers_lock a las personas que llaman, pero en su lugar introdujo un error \"sb_bread() con read_lock(&pointers_lock)\" (que hizo que esto problema más fácil de abordar). Al Viro sugirió que por qué no hacer lo que hace get_branch()/get_block()/find_shared() en el sistema de archivos Minix. Y hacer eso es casi una reversión de \"[PATCH] err1-40: corrección de bloqueo de sysvfs\", excepto que get_branch() de find_shared() se llama sin write_lock(&pointers_lock)."
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