CVE-2026-23224 (GCVE-0-2026-23224)
Vulnerability from cvelistv5 – Published: 2026-02-18 14:53 – Updated: 2026-02-23 03:16
VLAI?
Title
erofs: fix UAF issue for file-backed mounts w/ directio option
Summary
In the Linux kernel, the following vulnerability has been resolved:
erofs: fix UAF issue for file-backed mounts w/ directio option
[ 9.269940][ T3222] Call trace:
[ 9.269948][ T3222] ext4_file_read_iter+0xac/0x108
[ 9.269979][ T3222] vfs_iocb_iter_read+0xac/0x198
[ 9.269993][ T3222] erofs_fileio_rq_submit+0x12c/0x180
[ 9.270008][ T3222] erofs_fileio_submit_bio+0x14/0x24
[ 9.270030][ T3222] z_erofs_runqueue+0x834/0x8ac
[ 9.270054][ T3222] z_erofs_read_folio+0x120/0x220
[ 9.270083][ T3222] filemap_read_folio+0x60/0x120
[ 9.270102][ T3222] filemap_fault+0xcac/0x1060
[ 9.270119][ T3222] do_pte_missing+0x2d8/0x1554
[ 9.270131][ T3222] handle_mm_fault+0x5ec/0x70c
[ 9.270142][ T3222] do_page_fault+0x178/0x88c
[ 9.270167][ T3222] do_translation_fault+0x38/0x54
[ 9.270183][ T3222] do_mem_abort+0x54/0xac
[ 9.270208][ T3222] el0_da+0x44/0x7c
[ 9.270227][ T3222] el0t_64_sync_handler+0x5c/0xf4
[ 9.270253][ T3222] el0t_64_sync+0x1bc/0x1c0
EROFS may encounter above panic when enabling file-backed mount w/
directio mount option, the root cause is it may suffer UAF in below
race condition:
- z_erofs_read_folio wq s_dio_done_wq
- z_erofs_runqueue
- erofs_fileio_submit_bio
- erofs_fileio_rq_submit
- vfs_iocb_iter_read
- ext4_file_read_iter
- ext4_dio_read_iter
- iomap_dio_rw
: bio was submitted and return -EIOCBQUEUED
- dio_aio_complete_work
- dio_complete
- dio->iocb->ki_complete (erofs_fileio_ki_complete())
- kfree(rq)
: it frees iocb, iocb.ki_filp can be UAF in file_accessed().
- file_accessed
: access NULL file point
Introduce a reference count in struct erofs_fileio_rq, and initialize it
as two, both erofs_fileio_ki_complete() and erofs_fileio_rq_submit() will
decrease reference count, the last one decreasing the reference count
to zero will free rq.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Linux | Linux |
Affected:
fb176750266a3d7f42ebdcf28e8ba40350b27847 , < ae385826840a3c8e09bf38cac90adcd690716f57
(git)
Affected: fb176750266a3d7f42ebdcf28e8ba40350b27847 , < d741534302f71c511eb0bb670b92eaa7df4a0aec (git) Affected: fb176750266a3d7f42ebdcf28e8ba40350b27847 , < b2ee5e4d5446babd23ff7beb4e636be0fb3ea5aa (git) Affected: fb176750266a3d7f42ebdcf28e8ba40350b27847 , < 1caf50ce4af096d0280d59a31abdd85703cd995c (git) |
||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/erofs/fileio.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "ae385826840a3c8e09bf38cac90adcd690716f57",
"status": "affected",
"version": "fb176750266a3d7f42ebdcf28e8ba40350b27847",
"versionType": "git"
},
{
"lessThan": "d741534302f71c511eb0bb670b92eaa7df4a0aec",
"status": "affected",
"version": "fb176750266a3d7f42ebdcf28e8ba40350b27847",
"versionType": "git"
},
{
"lessThan": "b2ee5e4d5446babd23ff7beb4e636be0fb3ea5aa",
"status": "affected",
"version": "fb176750266a3d7f42ebdcf28e8ba40350b27847",
"versionType": "git"
},
{
"lessThan": "1caf50ce4af096d0280d59a31abdd85703cd995c",
"status": "affected",
"version": "fb176750266a3d7f42ebdcf28e8ba40350b27847",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"fs/erofs/fileio.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"lessThan": "6.12",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.72",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.11",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"version": "6.19.1",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.0-rc1",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.72",
"versionStartIncluding": "6.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.11",
"versionStartIncluding": "6.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.19.1",
"versionStartIncluding": "6.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.0-rc1",
"versionStartIncluding": "6.12",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix UAF issue for file-backed mounts w/ directio option\n\n[ 9.269940][ T3222] Call trace:\n[ 9.269948][ T3222] ext4_file_read_iter+0xac/0x108\n[ 9.269979][ T3222] vfs_iocb_iter_read+0xac/0x198\n[ 9.269993][ T3222] erofs_fileio_rq_submit+0x12c/0x180\n[ 9.270008][ T3222] erofs_fileio_submit_bio+0x14/0x24\n[ 9.270030][ T3222] z_erofs_runqueue+0x834/0x8ac\n[ 9.270054][ T3222] z_erofs_read_folio+0x120/0x220\n[ 9.270083][ T3222] filemap_read_folio+0x60/0x120\n[ 9.270102][ T3222] filemap_fault+0xcac/0x1060\n[ 9.270119][ T3222] do_pte_missing+0x2d8/0x1554\n[ 9.270131][ T3222] handle_mm_fault+0x5ec/0x70c\n[ 9.270142][ T3222] do_page_fault+0x178/0x88c\n[ 9.270167][ T3222] do_translation_fault+0x38/0x54\n[ 9.270183][ T3222] do_mem_abort+0x54/0xac\n[ 9.270208][ T3222] el0_da+0x44/0x7c\n[ 9.270227][ T3222] el0t_64_sync_handler+0x5c/0xf4\n[ 9.270253][ T3222] el0t_64_sync+0x1bc/0x1c0\n\nEROFS may encounter above panic when enabling file-backed mount w/\ndirectio mount option, the root cause is it may suffer UAF in below\nrace condition:\n\n- z_erofs_read_folio wq s_dio_done_wq\n - z_erofs_runqueue\n - erofs_fileio_submit_bio\n - erofs_fileio_rq_submit\n - vfs_iocb_iter_read\n - ext4_file_read_iter\n - ext4_dio_read_iter\n - iomap_dio_rw\n : bio was submitted and return -EIOCBQUEUED\n - dio_aio_complete_work\n - dio_complete\n - dio-\u003eiocb-\u003eki_complete (erofs_fileio_ki_complete())\n - kfree(rq)\n : it frees iocb, iocb.ki_filp can be UAF in file_accessed().\n - file_accessed\n : access NULL file point\n\nIntroduce a reference count in struct erofs_fileio_rq, and initialize it\nas two, both erofs_fileio_ki_complete() and erofs_fileio_rq_submit() will\ndecrease reference count, the last one decreasing the reference count\nto zero will free rq."
}
],
"providerMetadata": {
"dateUpdated": "2026-02-23T03:16:31.463Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ae385826840a3c8e09bf38cac90adcd690716f57"
},
{
"url": "https://git.kernel.org/stable/c/d741534302f71c511eb0bb670b92eaa7df4a0aec"
},
{
"url": "https://git.kernel.org/stable/c/b2ee5e4d5446babd23ff7beb4e636be0fb3ea5aa"
},
{
"url": "https://git.kernel.org/stable/c/1caf50ce4af096d0280d59a31abdd85703cd995c"
}
],
"title": "erofs: fix UAF issue for file-backed mounts w/ directio option",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-23224",
"datePublished": "2026-02-18T14:53:27.462Z",
"dateReserved": "2026-01-13T15:37:45.987Z",
"dateUpdated": "2026-02-23T03:16:31.463Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-23224\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-02-18T16:22:32.143\",\"lastModified\":\"2026-02-23T04:16:00.923\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nerofs: fix UAF issue for file-backed mounts w/ directio option\\n\\n[ 9.269940][ T3222] Call trace:\\n[ 9.269948][ T3222] ext4_file_read_iter+0xac/0x108\\n[ 9.269979][ T3222] vfs_iocb_iter_read+0xac/0x198\\n[ 9.269993][ T3222] erofs_fileio_rq_submit+0x12c/0x180\\n[ 9.270008][ T3222] erofs_fileio_submit_bio+0x14/0x24\\n[ 9.270030][ T3222] z_erofs_runqueue+0x834/0x8ac\\n[ 9.270054][ T3222] z_erofs_read_folio+0x120/0x220\\n[ 9.270083][ T3222] filemap_read_folio+0x60/0x120\\n[ 9.270102][ T3222] filemap_fault+0xcac/0x1060\\n[ 9.270119][ T3222] do_pte_missing+0x2d8/0x1554\\n[ 9.270131][ T3222] handle_mm_fault+0x5ec/0x70c\\n[ 9.270142][ T3222] do_page_fault+0x178/0x88c\\n[ 9.270167][ T3222] do_translation_fault+0x38/0x54\\n[ 9.270183][ T3222] do_mem_abort+0x54/0xac\\n[ 9.270208][ T3222] el0_da+0x44/0x7c\\n[ 9.270227][ T3222] el0t_64_sync_handler+0x5c/0xf4\\n[ 9.270253][ T3222] el0t_64_sync+0x1bc/0x1c0\\n\\nEROFS may encounter above panic when enabling file-backed mount w/\\ndirectio mount option, the root cause is it may suffer UAF in below\\nrace condition:\\n\\n- z_erofs_read_folio wq s_dio_done_wq\\n - z_erofs_runqueue\\n - erofs_fileio_submit_bio\\n - erofs_fileio_rq_submit\\n - vfs_iocb_iter_read\\n - ext4_file_read_iter\\n - ext4_dio_read_iter\\n - iomap_dio_rw\\n : bio was submitted and return -EIOCBQUEUED\\n - dio_aio_complete_work\\n - dio_complete\\n - dio-\u003eiocb-\u003eki_complete (erofs_fileio_ki_complete())\\n - kfree(rq)\\n : it frees iocb, iocb.ki_filp can be UAF in file_accessed().\\n - file_accessed\\n : access NULL file point\\n\\nIntroduce a reference count in struct erofs_fileio_rq, and initialize it\\nas two, both erofs_fileio_ki_complete() and erofs_fileio_rq_submit() will\\ndecrease reference count, the last one decreasing the reference count\\nto zero will free rq.\"},{\"lang\":\"es\",\"value\":\"Se ha resuelto la siguiente vulnerabilidad en el kernel de Linux:\\n\\nerofs: soluciona un problema de UAF para montajes respaldados por archivos con la opci\u00f3n \u0027directio\u0027\\n\\n[ 9.269940][ T3222] Rastreo de llamadas:\\n[ 9.269948][ T3222] ext4_file_read_iter+0xac/0x108\\n[ 9.269979][ T3222] vfs_iocb_iter_read+0xac/0x198\\n[ 9.269993][ T3222] erofs_fileio_rq_submit+0x12c/0x180\\n[ 9.270008][ T3222] erofs_fileio_submit_bio+0x14/0x24\\n[ 9.270030][ T3222] z_erofs_runqueue+0x834/0x8ac\\n[ 9.270054][ T3222] z_erofs_read_folio+0x120/0x220\\n[ 9.270083][ T3222] filemap_read_folio+0x60/0x120\\n[ 9.270102][ T3222] filemap_fault+0xcac/0x1060\\n[ 9.270119][ T3222] do_pte_missing+0x2d8/0x1554\\n[ 9.270131][ T3222] handle_mm_fault+0x5ec/0x70c\\n[ 9.270142][ T3222] do_page_fault+0x178/0x88c\\n[ 9.270167][ T3222] do_translation_fault+0x38/0x54\\n[ 9.270183][ T3222] do_mem_abort+0x54/0xac\\n[ 9.270208][ T3222] el0_da+0x44/0x7c\\n[ 9.270227][ T3222] el0t_64_sync_handler+0x5c/0xf4\\n[ 9.270253][ T3222] el0t_64_sync+0x1bc/0x1c0\\n\\nEROFS puede encontrar el p\u00e1nico anterior al habilitar el montaje respaldado por archivos con la opci\u00f3n de montaje directio; la causa ra\u00edz es que puede sufrir UAF en la siguiente condici\u00f3n de carrera:\\n\\n- z_erofs_read_folio wq s_dio_done_wq\\n - z_erofs_runqueue\\n - erofs_fileio_submit_bio\\n - erofs_fileio_rq_submit\\n - vfs_iocb_iter_read\\n - ext4_file_read_iter\\n - ext4_dio_read_iter\\n - iomap_dio_rw\\n : bio fue enviado y devuelve -EIOCBQUEUED\\n - dio_aio_complete_work\\n - dio_complete\\n - dio-\u0026gt;iocb-\u0026gt;ki_complete (erofs_fileio_ki_complete())\\n - kfree(rq)\\n : libera iocb, iocb.ki_filp puede ser UAF en file_accessed().\\n - file_accessed\\n : accede a un puntero de archivo NULL\\n\\nIntroducir un contador de referencias en la estructura erofs_fileio_rq, y lo inicializa a dos; tanto erofs_fileio_ki_complete() como erofs_fileio_rq_submit() disminuir\u00e1n el contador de referencias, el \u00faltimo en disminuir el contador de referencias a cero liberar\u00e1 rq.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1caf50ce4af096d0280d59a31abdd85703cd995c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ae385826840a3c8e09bf38cac90adcd690716f57\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b2ee5e4d5446babd23ff7beb4e636be0fb3ea5aa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d741534302f71c511eb0bb670b92eaa7df4a0aec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…