AZL-97778
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-97778.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-97778
- Upstream
- Published
- 2026-08-26T15:16:54Z
- Modified
- 2026-08-29T05:27:27Z
- Summary
- CVE-2026-74753 affecting package kernel 6.6.150.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
perf: Reject exited events as group leaders
perfeventremoveonexec() sets remove-on-exec events to the EXIT state and detaches their group relationships. The event's file descriptor can remain open, however, and perfeventopen() 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, perfgroupdetach() observes that its PERFATTACHGROUP 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]
- References