perf: Reject exited events as group leaders
Summary
| CVE | CVE-2026-74753 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-26 15:16:54 UTC |
| Updated | 2026-09-02 13:18:10 UTC |
| Description | 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] |
Risk And Classification
Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.001280000 probability, percentile 0.027790000 (date 2026-09-03)
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | Secondary | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 3.1 | CNA | DECLARED | 7.8 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
CVSS v3.1 Breakdown
Attack Vector
LocalAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 4cdb1b3ab96eb1b7eb70bc5c82fede334bd60df2 ce12e1170c0c78dffb9b28af6d287492ae7dd99d git | Not specified |
| CNA | Linux | Linux | affected 39358e856fb89e62e3c8d7389a2dc4ec33dbe90e e593031ff19a9484e8a00bc47edd447187721846 git | Not specified |
| CNA | Linux | Linux | affected a2d5d3ee7b6e3953114726b1521e62123ab5b043 7a03413f31c196ab3894f988cdce0bb47b4fec42 git | Not specified |
| CNA | Linux | Linux | affected 06ccef0434e98058ddae7bcebc901f93d22b7653 7ce010275c531475f9d6e7efb11b9e522c74ed2e git | Not specified |
| CNA | Linux | Linux | affected 037a3c43edfb597665dd34457cd22b14692f2ba3 fa091f46c3833fb22384f10eade2b4e1e1d0b278 git | Not specified |
| CNA | Linux | Linux | affected 6.6.145 6.6.156 semver | Not specified |
| CNA | Linux | Linux | affected 6.12.96 6.12.108 semver | Not specified |
| CNA | Linux | Linux | affected 6.18.39 6.18.46 semver | Not specified |
| CNA | Linux | Linux | affected 7.1.4 7.1.10 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/7ce010275c531475f9d6e7efb11b9e522c74ed2e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/e593031ff19a9484e8a00bc47edd447187721846 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/7a03413f31c196ab3894f988cdce0bb47b4fec42 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ce12e1170c0c78dffb9b28af6d287492ae7dd99d | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/fa091f46c3833fb22384f10eade2b4e1e1d0b278 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.