CVE-2026-97619
Full vulnerability record from the local CVENow database.
Description
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: 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 state End the write from io_complete_rw() instead, and leave only the fsnotify calls in task_work.
View original CVE JSON
{
"id": "CVE-2026-97619",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-25T11:17:16.117",
"lastModified": "2026-10-30T13:21:10.027",
"vulnStatus": "Received",
"cveTags": [],
"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."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"io_uring/rw.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "ea2e6286e3e89a115ae554e20ba9aec2b2e1ddff",
"lessThan": "aa4a3bec32ffe20ba1044db8211140edf7637310",
"versionType": "git",
"status": "affected"
},
{
"version": "89a410dbd0f159ddd308f19d6eb682fc753e4771",
"lessThan": "16840e3478c72ebbf093c52cbdcd8a1f12fad692",
"versionType": "git",
"status": "affected"
},
{
"version": "b000145e9907809406d8164c3b2b8861d95aecd1",
"lessThan": "ed1cead97afb9c398bd7ab344a3c1ee34ab73af9",
"versionType": "git",
"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": "2a853c206e553dd9c0a55c22858fd6a446d93e15",
"versionType": "git",
"status": "affected"
},
{
"version": "5.10.165",
"lessThan": "5.10.273",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.15.90",
"lessThan": "5.15.224",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.0.3",
"lessThan": "6.1",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"io_uring/rw.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.1",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.1",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.273",
"lessThanOrEqual": "5.10.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.15.224",
"lessThanOrEqual": "5.15.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.160",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.112",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.53",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.7",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/055d43a1233edbd80e558889258105ce63051bcd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/16840e3478c72ebbf093c52cbdcd8a1f12fad692",
"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/aa4a3bec32ffe20ba1044db8211140edf7637310",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cc580cee4dfa2ec9099c30ecbd4d804cbb996432",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ed1cead97afb9c398bd7ab344a3c1ee34ab73af9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}