CVE-2026-74308
In the Linux kernel, the following vulnerability has been resolved:
ext4: fix kernel BUG in ext4_write_inline_data_end
When the data=journal mount option is used, the ext4_journalled_write_end() function incorrectly calls ext4_write_inline_data_end() without checking if the EXT4_STATE_MAY_INLINE_DATA flag is still set on the inode.
If a previous attempt to convert the inline data to an extent failed (e.g. due to ENOSPC), the EXT4_STATE_MAY_INLINE_DATA flag is cleared, but the EXT4_INODE_INLINE_DATA flag remains set.
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In this scenario, the next call to ext4_write_begin() will not prepare the inline data xattr for writing, but ext4_journalled_write_end() will incorrectly attempt to write to it, triggering a BUG_ON(pos + len > EXT4_I(inode)->i_inline_size) in ext4_write_inline_data() since i_inline_size was not expanded.
Fix this by ensuring that ext4_journalled_write_end() only calls ext4_write_inline_data_end() if the EXT4_STATE_MAY_INLINE_DATA flag is set, mirroring the behavior of ext4_write_end() and ext4_da_write_end().
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- 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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/0ae42b51607240990614e0843f0d3529aaff62cc
- https://git.kernel.org/stable/c/260830a9a706f5d335398236fc788ce32f220de1
- https://git.kernel.org/stable/c/9808ae9fae996afa942bd963a39c9b1cdeebd0bd
- https://git.kernel.org/stable/c/ad09aa45965d3fafaf9963bc78109b73c0f9ac8d
- https://git.kernel.org/stable/c/f00f5c0dd55319bc33b76f72c853bda0e0a32eda
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-74308",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb",
"lessThan": "260830a9a706f5d335398236fc788ce32f220de1",
"versionType": "git"
},
{
"status": "affected",
"version": "3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb",
"lessThan": "9808ae9fae996afa942bd963a39c9b1cdeebd0bd",
"versionType": "git"
},
{
"status": "affected",
"version": "3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb",
"lessThan": "f00f5c0dd55319bc33b76f72c853bda0e0a32eda",
"versionType": "git"
},
{
"status": "affected",
"version": "3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb",
"lessThan": "0ae42b51607240990614e0843f0d3529aaff62cc",
"versionType": "git"
},
{
"status": "affected",
"version": "3fdcfb668fd78ec92d9bc2daddf1d41e2a8a30bb",
"lessThan": "ad09aa45965d3fafaf9963bc78109b73c0f9ac8d",
"versionType": "git"
}
],
"programFiles": [
"fs/ext4/inode.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/ext4/inode.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-15T06:22:30.653",
"references": [
{
"url": "https://git.kernel.org/stable/c/0ae42b51607240990614e0843f0d3529aaff62cc",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/260830a9a706f5d335398236fc788ce32f220de1",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9808ae9fae996afa942bd963a39c9b1cdeebd0bd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ad09aa45965d3fafaf9963bc78109b73c0f9ac8d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f00f5c0dd55319bc33b76f72c853bda0e0a32eda",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix kernel BUG in ext4_write_inline_data_end\n\nWhen the data=journal mount option is used, the ext4_journalled_write_end()\nfunction incorrectly calls ext4_write_inline_data_end() without checking\nif the EXT4_STATE_MAY_INLINE_DATA flag is still set on the inode.\n\nIf a previous attempt to convert the inline data to an extent failed (e.g.\ndue to ENOSPC), the EXT4_STATE_MAY_INLINE_DATA flag is cleared, but\nthe EXT4_INODE_INLINE_DATA flag remains set. In this scenario, the next\ncall to ext4_write_begin() will not prepare the inline data xattr for\nwriting, but ext4_journalled_write_end() will incorrectly attempt to write\nto it, triggering a BUG_ON(pos + len > EXT4_I(inode)->i_inline_size) in\next4_write_inline_data() since i_inline_size was not expanded.\n\nFix this by ensuring that ext4_journalled_write_end() only calls\next4_write_inline_data_end() if the EXT4_STATE_MAY_INLINE_DATA flag is\nset, mirroring the behavior of ext4_write_end() and ext4_da_write_end()."
}
],
"lastModified": "2026-08-17T06:19:24.997",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}