CVE-2026-74753High· 7.8▾ TwilightIn 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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]
Linux >= 4cdb1b3ab96eb1b7eb70bc5c82fede334bd60df2 < ce12e1170c0c78dffb9b28af6d287492ae7dd99dLinux >= 39358e856fb89e62e3c8d7389a2dc4ec33dbe90e < e593031ff19a9484e8a00bc47edd447187721846Linux >= a2d5d3ee7b6e3953114726b1521e62123ab5b043 < 7a03413f31c196ab3894f988cdce0bb47b4fec42Linux >= 06ccef0434e98058ddae7bcebc901f93d22b7653 < 7ce010275c531475f9d6e7efb11b9e522c74ed2eLinux >= 037a3c43edfb597665dd34457cd22b14692f2ba3 < fa091f46c3833fb22384f10eade2b4e1e1d0b278Linux >= 6.6.145 < 6.6.156Linux >= 6.12.96 < 6.12.108Linux >= 6.18.39 < 6.18.46Linux >= 7.1.4 < 7.1.10Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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