io_uring/io-wq: re-check IO_WQ_BIT_EXIT for each linked work item
In the Linux kernel, the following vulnerability has been resolved: io_uring/io-wq: re-check IO_WQ_BIT_EXIT for each linked work item commit 10dc95939817 ("io_uring/io-wq: check IO_WQ_BIT_EXIT inside work run loop") fixed the obvious case where io_worker_handle_work() took one exit-bit snapshot before draining pending work, but the fix stops one level too early. io_worker_handle_work() now re-checks IO_WQ_BIT_EXIT in its outer work run loop, yet it still snapshots that bit once before processing a whole dependent linked-work chain. If io_wq_exit_start() sets IO_WQ_BIT_EXIT after the first linked item has started, the remaining linked items can still reuse stale do_kill = false, skip IO_WQ_WORK_CANCEL, and continue running after exit has begun. Move the check further inside, so it covers linked items too. Note: this is a syzbot special as it loves setting up tons of slow linked work on weird devices like msr that take forever to read, and immediately close the ring. Exit then takes a long time.
CVE-2026-64425
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-64425
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "065dd936195a3466b8ebe5f9287400987ee3c063",
"lessThan": "14b7ecad2ec56699325180a744f4b19f046401bb",
"versionType": "git"
},
{
"status": "affected",
"version": "27e47500fac23d15b7dc93ff650bc4844d2581bd",
"lessThan": "d179533c610e1b4c6aa436e3c1fd1b719d2c727c",
"versionType": "git"
},
{
"status": "affected",
"version": "d05d99573f81a091547b1778b9a50120f5d6c68a",
"lessThan": "6e2f51f3e06773c2ee98ad09738f0908b48f76f9",
"versionType": "git"
},
{
"status": "affected",
"version": "85eb83694a91c89d9abe615d717c0053c3efa714",
"lessThan": "ea61b04e1d7242cb37f5ed2cc91cf21a493f6597",
"versionType": "git"
},
{
"status": "affected",
"version": "2e8ca1078b14142db2ce51cbd18ff9971560046b",
"lessThan": "b6f179a653a934736c88d820fe0098c3c2532549",
"versionType": "git"
},
{
"status": "affected",
"version": "bdf0bf73006ea8af9327cdb85cfdff4c23a5f966",
"lessThan": "1636d85dc139b07c0449308f2bb5e0c7a2e0da99",
"versionType": "git"
},
{
"status": "affected",
"version": "10dc959398175736e495f71c771f8641e1ca1907",
"lessThan": "ab85765cbe3258b43dc6729af0e6ce3a87a133d8",
"versionType": "git"
},
{
"status": "affected",
"version": "10dc959398175736e495f71c771f8641e1ca1907",
"lessThan": "29bef9934b2521f787bb15dd1985d4c0d12ae02a",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.253",
"lessThan": "5.10.261",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.203",
"lessThan": "5.15.212",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.167",
"lessThan": "6.1.178",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.122",
"lessThan": "6.6.145",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.68",
"lessThan": "6.12.96",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.8",
"lessThan": "6.18.39",
"versionType": "semver"
}
],
"programFiles": [
"io_uring/io-wq.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.261",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.212",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.96",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.39",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"io_uring/io-wq.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64425
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #28465 · Revision 1
- Added to Heist Feed
- Publisher date