perf: Reject exited events as group leaders
In the Linux kernel, the following vulnerability has been resolved: perf: Reject exited events as group leaders perf_event_remove_on_exec() sets remove-on-exec events to the EXIT state and detaches their group relationships. The event's file descriptor can remain open, however, and perf_event_open() currently accepts that event as a group leader because its early validation rejects only REVOKED and DEAD events. A new sibling can consequently be linked to the detached leader. When the leader is closed, perf_group_detach() observes that its PERF_ATTACH_GROUP bit is already clear and skips the new sibling. The sibling then retains a group_leader pointer to the freed event. Reject group leaders in the EXIT state. Perform the check while holding the shared context mutex so that an exec in the target task cannot detach the leader between validation and group attachment. [peterz: make the earlier test fully consistent]
CVE-2026-74753
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-2026-74753
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": "4cdb1b3ab96eb1b7eb70bc5c82fede334bd60df2",
"lessThan": "ce12e1170c0c78dffb9b28af6d287492ae7dd99d",
"versionType": "git"
},
{
"status": "affected",
"version": "39358e856fb89e62e3c8d7389a2dc4ec33dbe90e",
"lessThan": "e593031ff19a9484e8a00bc47edd447187721846",
"versionType": "git"
},
{
"status": "affected",
"version": "a2d5d3ee7b6e3953114726b1521e62123ab5b043",
"lessThan": "7a03413f31c196ab3894f988cdce0bb47b4fec42",
"versionType": "git"
},
{
"status": "affected",
"version": "06ccef0434e98058ddae7bcebc901f93d22b7653",
"lessThan": "7ce010275c531475f9d6e7efb11b9e522c74ed2e",
"versionType": "git"
},
{
"status": "affected",
"version": "037a3c43edfb597665dd34457cd22b14692f2ba3",
"lessThan": "fa091f46c3833fb22384f10eade2b4e1e1d0b278",
"versionType": "git"
}
],
"programFiles": [
"kernel/events/core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6.145",
"lessThan": "6.6.156",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.96",
"lessThan": "6.12.108",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.18.39",
"lessThan": "6.18.46",
"versionType": "semver"
},
{
"status": "affected",
"version": "7.1.4",
"lessThan": "7.1.10",
"versionType": "semver"
}
],
"programFiles": [
"kernel/events/core.c"
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-74753
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34307 · Revision 1
- Added to Heist Feed
- Publisher date