CVE-2026-74753perf: Reject exited events as group leaders
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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]
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 4cdb1b3ab96eb1b7eb70bc5c82fede334bd60df2 before ce12e1170c0c78dffb9b28af6d287492ae7dd99d; from 39358e856fb89e62e3c8d7389a2dc4ec33dbe90e before e593031ff19a9484e8a00bc47edd447187721846; from a2d5d3ee7b6e3953114726b1521e62123ab5b043 before 7a03413f31c196ab3894f988cdce0bb47b4fec42; from 06ccef0434e98058ddae7bcebc901f93d22b7653 before 7ce010275c531475f9d6e7efb11b9e522c74ed2e; from 037a3c43edfb597665dd34457cd22b14692f2ba3 before fa091f46c3833fb22384f10eade2b4e1e1d0b278 | CNA record |
References
- https://git.kernel.org/stable/c/ce12e1170c0c78dffb9b28af6d287492ae7dd99d
- https://git.kernel.org/stable/c/e593031ff19a9484e8a00bc47edd447187721846
- https://git.kernel.org/stable/c/7a03413f31c196ab3894f988cdce0bb47b4fec42
- https://git.kernel.org/stable/c/7ce010275c531475f9d6e7efb11b9e522c74ed2e
- https://git.kernel.org/stable/c/fa091f46c3833fb22384f10eade2b4e1e1d0b278
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.