CVE-2022-49363
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
f2fs: fix to do sanity check on block address in f2fs_do_zero_range()
As Yanming reported in bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=215894
I have encountered a bug in F2FS file system in kernel v5.17.
I have uploaded the system call sequence as case.c, and a fuzzed image can be found in google net disk
The kernel should enable CONFIG_KASAN=y and CONFIG_KASAN_INLINE=y. You can reproduce the bug by running the following commands:
The root cause is, after image was fuzzed, block mapping info in inode will be inconsistent with SIT table, so in f2fs_fallocate(), it will cause panic when updating SIT with invalid blkaddr.
Leer descripción completaMostrar menos
Let's fix the issue by adding sanity check on block address before updating SIT table with it.
Detalles técnicos trazas, registros y código del informe original
kernel BUG at fs/f2fs/segment.c:2291! Call Trace: f2fs_invalidate_blocks+0x193/0x2d0 f2fs_fallocate+0x2593/0x4a70 vfs_fallocate+0x2a5/0xac0 ksys_fallocate+0x35/0x70 __x64_sys_fallocate+0x8e/0xf0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.28%
- Percentil entre todas las CVEs puntuadas: 18
- 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).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/25f8236213a91efdf708b9d77e9e51b6fc3e141c
- https://git.kernel.org/stable/c/470493be19a5730ed432e3ac0f29a2ee7fc6c557
- https://git.kernel.org/stable/c/7361c9f2bd6a8f0cbb41cdea9aff04765ff23f67
- https://git.kernel.org/stable/c/805b48b234a2803cb7daec7f158af12f0fbaefac
- https://git.kernel.org/stable/c/a34d7b49894b0533222188a52e2958750f830efd
- https://git.kernel.org/stable/c/f2e1c38b5ac64eb1a16a89c52fb419409d12c25b
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to do sanity check on block address in f2fs_do_zero_range()\n\nAs Yanming reported in bugzilla:\n\nhttps://bugzilla.kernel.org/show_bug.cgi?id=215894\n\nI have encountered a bug in F2FS file system in kernel v5.17.\n\nI have uploaded the system call sequence as case.c, and a fuzzed image can\nbe found in google net disk\n\nThe kernel should enable CONFIG_KASAN=y and CONFIG_KASAN_INLINE=y. You can\nreproduce the bug by running the following commands:\n\nkernel BUG at fs/f2fs/segment.c:2291!\nCall Trace:\n f2fs_invalidate_blocks+0x193/0x2d0\n f2fs_fallocate+0x2593/0x4a70\n vfs_fallocate+0x2a5/0xac0\n ksys_fallocate+0x35/0x70\n __x64_sys_fallocate+0x8e/0xf0\n do_syscall_64+0x3b/0x90\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nThe root cause is, after image was fuzzed, block mapping info in inode\nwill be inconsistent with SIT table, so in f2fs_fallocate(), it will cause\npanic when updating SIT with invalid blkaddr.\n\nLet's fix the issue by adding sanity check on block address before updating\nSIT table with it."
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"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: corrección para realizar una comprobación de cordura en la dirección de bloque en f2fs_do_zero_range() Como informó Yanming en bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215894 He encontrado un error en el sistema de archivos F2FS en el kernel v5.17. He subido la secuencia de llamada del sistema como case.c, y se puede encontrar una imagen difusa en google net disk El kernel debe habilitar CONFIG_KASAN=y y CONFIG_KASAN_INLINE=y. Puede reproducir el error ejecutando los siguientes comandos: kernel BUG at fs/f2fs/segment.c:2291! Rastreo de llamadas: f2fs_invalidate_blocks+0x193/0x2d0 f2fs_fallocate+0x2593/0x4a70 vfs_fallocate+0x2a5/0xac0 ksys_fallocate+0x35/0x70 __x64_sys_fallocate+0x8e/0xf0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae La causa raíz es que, después de que se realizó el análisis difuso de la imagen, la información de mapeo de bloques en el inodo será inconsistente con la tabla SIT, por lo que en f2fs_fallocate(), causará pánico al actualizar SIT con blkaddr no válido. Solucionemos el problema agregando una verificación de cordura en la dirección del bloque antes de actualizar la tabla SIT con ella."
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