workqueue: Fix NULL current_pwq deref in chained work check
In the Linux kernel, the following vulnerability has been resolved: workqueue: Fix NULL current_pwq deref in chained work check current_wq_worker() only tells us that %current is a kworker. It does not guarantee that the worker is currently executing a work item, as worker->current_pwq is populated only while process_one_work() is running the work function. is_chained_work() can be reached while queueing on a draining or destroying workqueue. If a kworker outside work-item execution reaches that path, current_wq_worker() returns a worker but worker->current_pwq is NULL, and the chained-work test can fault before it emits the intended warning. Guard the chained-work test with worker->current_pwq. A kworker without current_pwq is not executing work on the target workqueue, so the helper should return false and let the draining/destroying warning fire.
CVE-2026-99058
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-2026-99058
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": "8d03ecfe471802d6afe97da97722b6924533aa82",
"lessThan": "3dc61af2998cfc7312d6e59bbdcd5eed074483f2",
"versionType": "git"
},
{
"status": "affected",
"version": "8d03ecfe471802d6afe97da97722b6924533aa82",
"lessThan": "729d576df89c7e4341e58c452f8890620a610ac2",
"versionType": "git"
},
{
"status": "affected",
"version": "8d03ecfe471802d6afe97da97722b6924533aa82",
"lessThan": "b12a25fb2b9d5dac80e419d695450cc17a51fdfd",
"versionType": "git"
},
{
"status": "affected",
"version": "8d03ecfe471802d6afe97da97722b6924533aa82",
"lessThan": "1a2668682e998039a027796b236319b380078a6a",
"versionType": "git"
},
{
"status": "affected",
"version": "8d03ecfe471802d6afe97da97722b6924533aa82",
"lessThan": "980db94e3eeefdd8a1c46f86412c33a7f7806f51",
"versionType": "git"
}
],
"programFiles": [
"kernel/workqueue.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.9"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.9",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.11",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/workqueue.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-99058
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #52885 · Revision 1
- Added to Heist Feed
- Publisher date