gsd-2024-26590
Vulnerability from gsd
Modified
2024-02-20 06:02
Details
In the Linux kernel, the following vulnerability has been resolved:
erofs: fix inconsistent per-file compression format
EROFS can select compression algorithms on a per-file basis, and each
per-file compression algorithm needs to be marked in the on-disk
superblock for initialization.
However, syzkaller can generate inconsistent crafted images that use
an unsupported algorithmtype for specific inodes, e.g. use MicroLZMA
algorithmtype even it's not set in `sbi->available_compr_algs`. This
can lead to an unexpected "BUG: kernel NULL pointer dereference" if
the corresponding decompressor isn't built-in.
Fix this by checking against `sbi->available_compr_algs` for each
m_algorithmformat request. Incorrect !erofs_sb_has_compr_cfgs preset
bitmap is now fixed together since it was harmless previously.
Aliases
{
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
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"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix inconsistent per-file compression format\n\nEROFS can select compression algorithms on a per-file basis, and each\nper-file compression algorithm needs to be marked in the on-disk\nsuperblock for initialization.\n\nHowever, syzkaller can generate inconsistent crafted images that use\nan unsupported algorithmtype for specific inodes, e.g. use MicroLZMA\nalgorithmtype even it\u0027s not set in `sbi-\u003eavailable_compr_algs`. This\ncan lead to an unexpected \"BUG: kernel NULL pointer dereference\" if\nthe corresponding decompressor isn\u0027t built-in.\n\nFix this by checking against `sbi-\u003eavailable_compr_algs` for each\nm_algorithmformat request. Incorrect !erofs_sb_has_compr_cfgs preset\nbitmap is now fixed together since it was harmless previously.",
"id": "GSD-2024-26590",
"modified": "2024-02-20T06:02:29.316519Z",
"schema_version": "1.4.0"
}
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix inconsistent per-file compression format\n\nEROFS can select compression algorithms on a per-file basis, and each\nper-file compression algorithm needs to be marked in the on-disk\nsuperblock for initialization.\n\nHowever, syzkaller can generate inconsistent crafted images that use\nan unsupported algorithmtype for specific inodes, e.g. use MicroLZMA\nalgorithmtype even it\u0027s not set in `sbi-\u003eavailable_compr_algs`. This\ncan lead to an unexpected \"BUG: kernel NULL pointer dereference\" if\nthe corresponding decompressor isn\u0027t built-in.\n\nFix this by checking against `sbi-\u003eavailable_compr_algs` for each\nm_algorithmformat request. Incorrect !erofs_sb_has_compr_cfgs preset\nbitmap is now fixed together since it was harmless previously."
},
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"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: erofs: corrige el formato de compresi\u00f3n por archivo inconsistente EROFS puede seleccionar algoritmos de compresi\u00f3n por archivo, y cada algoritmo de compresi\u00f3n por archivo debe marcarse en el superbloque del disco para la inicializaci\u00f3n. Sin embargo, syzkaller puede generar im\u00e1genes manipuladas inconsistentes que usan un tipo de algoritmo no compatible para inodos espec\u00edficos, por ejemplo, usa el tipo de algoritmo MicroLZMA incluso si no est\u00e1 configurado en `sbi-\u0026gt;available_compr_algs`. Esto puede provocar un \"ERROR: desreferencia del puntero NULL del kernel\" inesperado si el descompresor correspondiente no est\u00e1 integrado. Solucione este problema comprobando con `sbi-\u0026gt;available_compr_algs` para cada solicitud de m_algorithmformat. El mapa de bits preestablecido !erofs_sb_has_compr_cfgs incorrecto ahora se corrige porque antes era inofensivo."
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"id": "CVE-2024-26590",
"lastModified": "2024-03-18T17:54:20.197",
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
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"published": "2024-02-22T17:15:09.103",
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}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.