CVE-2026-93268
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
ext4: skip extra isize expansion during mount to prevent deadlock
ext4_try_to_expand_extra_isize() is called from __ext4_mark_inode_dirty() while holding an active jbd2 handle. During mount (!SB_ACTIVE), the expand path may move xattrs to external blocks and release ea_inodes via iput(). When !SB_ACTIVE, iput() calls write_inode_now() which acquires s_writepages_rwsem, creating a circular lock dependency:
This can be triggered via:
or:
Skip expansion when !SB_ACTIVE. This is a minor loss of functionality (extra isize won't grow for these inodes during mount), which e2fsck can resolve later if needed.
Detalles técnicos trazas, registros y código del informe original
s_writepages_rwsem --> jbd2_handle --> xattr_sem --> s_writepages_rwsem
ext4_process_orphan() -> ext4_truncate() -> ext4_mark_inode_dirty()
-> ext4_try_to_expand_extra_isize()
ext4_evict_inode() -> ext4_mark_inode_dirty()
-> ext4_try_to_expand_extra_isize()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: 0.20%
- Percentil entre todas las CVEs puntuadas: 8
- 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).
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/1dd4882dbdc8bfdf2182fa388883c143fac0902a
- https://git.kernel.org/stable/c/2fb8ff81659a57c42bb7b49e8339a2be2a318ef8
- https://git.kernel.org/stable/c/41897f1bcf4ace5f1f28d0be784b6f4f0e929641
- https://git.kernel.org/stable/c/7461c60b9c6a839b13ad4c3490681a0cf5aa0637
- https://git.kernel.org/stable/c/7ace189b9ea79cf78df9c32b940ce12735f9459a
- https://git.kernel.org/stable/c/7ba09330d9ea6e996228316719eae812d7e04983
- https://git.kernel.org/stable/c/9c3469377b1d8caba6bec6ef3c460810bbfb02cc
- https://git.kernel.org/stable/c/c5e6434cc55f30220b228be237bb666351f9f4dd
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-93268",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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{
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{
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{
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{
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{
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{
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],
"published": "2026-09-24T16:17:23.730",
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{
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{
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{
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},
{
"url": "https://git.kernel.org/stable/c/c5e6434cc55f30220b228be237bb666351f9f4dd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: skip extra isize expansion during mount to prevent deadlock\n\next4_try_to_expand_extra_isize() is called from __ext4_mark_inode_dirty()\nwhile holding an active jbd2 handle. During mount (!SB_ACTIVE), the\nexpand path may move xattrs to external blocks and release ea_inodes via\niput(). When !SB_ACTIVE, iput() calls write_inode_now() which acquires\ns_writepages_rwsem, creating a circular lock dependency:\n\n s_writepages_rwsem --> jbd2_handle --> xattr_sem --> s_writepages_rwsem\n\nThis can be triggered via:\n\n ext4_process_orphan() -> ext4_truncate() -> ext4_mark_inode_dirty()\n -> ext4_try_to_expand_extra_isize()\n\nor:\n\n ext4_evict_inode() -> ext4_mark_inode_dirty()\n -> ext4_try_to_expand_extra_isize()\n\nSkip expansion when !SB_ACTIVE. This is a minor loss of functionality\n(extra isize won't grow for these inodes during mount), which e2fsck\ncan resolve later if needed."
}
],
"lastModified": "2026-09-24T16:17:23.730",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}