CVE-2026-97619
Estado: RecibidaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
io_uring/rw: end write accounting from ->ki_complete
Commit b000145e9907 moved both the fsnotify calls and the write accounting out of the kiocb completion handler and into the io_req_rw_complete() task_work. However, only the fsnotify part actually needed to move as it may sleep. Ending the write accounting is just a percpu_up_read() on the superblock writers sem.
Deferring it is a problem, because it makes dropping SB_FREEZE_WRITE protection depend on the ring owner getting to running task_work. But the task may be blocked in freeze_super(), causing it to never get to that:
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End the write from io_complete_rw() instead, and leave only the fsnotify calls in task_work.
Detalles técnicos trazas, registros y código del informe original
task io-wq worker
--------------------------------------------------------------
io_write()
io_kiocb_start_write() (takes sb_writers, hidden from
lockdep by __sb_writers_release)
write_iter() -> -EIOCBQUEUED
ioctl(FS_IOC_SHUTDOWN)
bdev_freeze()
freeze_super()
percpu_down_write() <- waits for the reader above
io_write()
kiocb_start_write()
percpu_down_read() <- queued
behind the
writer
<bio completes>
io_complete_rw()
queues io_req_rw_complete() <- never runs, task is in D stateCVSS
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: 9
- 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
JSON original (NVD)
Mostrar
{
"id": "CVE-2026-97619",
"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": "b000145e9907809406d8164c3b2b8861d95aecd1",
"lessThan": "696459029f3b65c070c91b729478475582f1dcdf",
"versionType": "git"
},
{
"status": "affected",
"version": "b000145e9907809406d8164c3b2b8861d95aecd1",
"lessThan": "cc580cee4dfa2ec9099c30ecbd4d804cbb996432",
"versionType": "git"
},
{
"status": "affected",
"version": "b000145e9907809406d8164c3b2b8861d95aecd1",
"lessThan": "055d43a1233edbd80e558889258105ce63051bcd",
"versionType": "git"
},
{
"status": "affected",
"version": "b000145e9907809406d8164c3b2b8861d95aecd1",
"lessThan": "796aa0547557e63338657ed1c487906f9fac4c73",
"versionType": "git"
},
{
"status": "affected",
"version": "ea2e6286e3e89a115ae554e20ba9aec2b2e1ddff",
"versionType": "git"
},
{
"status": "affected",
"version": "89a410dbd0f159ddd308f19d6eb682fc753e4771",
"versionType": "git"
},
{
"status": "affected",
"version": "2a853c206e553dd9c0a55c22858fd6a446d93e15",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.165",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.90",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.0.3",
"lessThan": "6.1",
"versionType": "semver"
}
],
"programFiles": [
"io_uring/rw.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"io_uring/rw.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-25T11:17:16.117",
"references": [
{
"url": "https://git.kernel.org/stable/c/055d43a1233edbd80e558889258105ce63051bcd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/696459029f3b65c070c91b729478475582f1dcdf",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/796aa0547557e63338657ed1c487906f9fac4c73",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cc580cee4dfa2ec9099c30ecbd4d804cbb996432",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/rw: end write accounting from ->ki_complete\n\nCommit b000145e9907 moved both the fsnotify calls and the write\naccounting out of the kiocb completion handler and into the\nio_req_rw_complete() task_work. However, only the fsnotify part actually\nneeded to move as it may sleep. Ending the write accounting is just a\npercpu_up_read() on the superblock writers sem.\n\nDeferring it is a problem, because it makes dropping SB_FREEZE_WRITE\nprotection depend on the ring owner getting to running task_work. But\nthe task may be blocked in freeze_super(), causing it to never get to\nthat:\n\n task io-wq worker\n --------------------------------------------------------------\n io_write()\n io_kiocb_start_write() (takes sb_writers, hidden from\n lockdep by __sb_writers_release)\n write_iter() -> -EIOCBQUEUED\n ioctl(FS_IOC_SHUTDOWN)\n bdev_freeze()\n freeze_super()\n percpu_down_write() <- waits for the reader above\n io_write()\n kiocb_start_write()\n percpu_down_read() <- queued\n behind the\n writer\n <bio completes>\n io_complete_rw()\n queues io_req_rw_complete() <- never runs, task is in D state\n\nEnd the write from io_complete_rw() instead, and leave only the fsnotify\ncalls in task_work."
}
],
"lastModified": "2026-10-03T11:18:08.137",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}