futex: Require sys_futex_requeue() to have identical flags
In the Linux kernel, the following vulnerability has been resolved: futex: Require sys_futex_requeue() to have identical flags Nicholas reported that his LLM found it was possible to create a UaF when sys_futex_requeue() is used with different flags. The initial motivation for allowing different flags was the variable sized futex, but since that hasn't been merged (yet), simply mandate the flags are identical, as is the case for the old style sys_futex() requeue operations.
CVE-2026-31554
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-2026-31554
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": "0f4b5f972216782a4acb1ae00dcb55173847c2ff",
"lessThan": "027145ace09fad4c7cbcd6c61fe9b429c63eb0e5",
"versionType": "git"
},
{
"status": "affected",
"version": "0f4b5f972216782a4acb1ae00dcb55173847c2ff",
"lessThan": "18b7d09c2b794c71d4252f3ea2cf84ad12b73d6a",
"versionType": "git"
},
{
"status": "affected",
"version": "0f4b5f972216782a4acb1ae00dcb55173847c2ff",
"lessThan": "e2f78c7ec1655fedd945366151ba54fcb9580508",
"versionType": "git"
},
{
"status": "affected",
"version": "0f4b5f972216782a4acb1ae00dcb55173847c2ff",
"lessThan": "19f94b39058681dec64a10ebeb6f23fe7fc3f77a",
"versionType": "git"
}
],
"programFiles": [
"kernel/futex/syscalls.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.80",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.21",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.11",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/futex/syscalls.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-31554
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #39922 · Revision 1
- Added to Heist Feed
- Publisher date