CVE-2025-38565
perf/core: Exit early on perf_mmap() fail
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Description
In the Linux kernel, the following vulnerability has been resolved: perf/core: Exit early on perf_mmap() fail When perf_mmap() fails to allocate a buffer, it still invokes the event_mapped() callback of the related event. On X86 this might increase the perf_rdpmc_allowed reference counter. But nothing undoes this as perf_mmap_close() is never called in this case, which causes another reference count leak. Return early on failure to prevent that.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/07091aade394f690e7b655578140ef84d0e8d7b0
- https://git.kernel.org/stable/c/163b0d1a209fe0df5476c1df2330ca12b55abf92
- https://git.kernel.org/stable/c/27d44145bd576bbef9bf6165bcd78128ec3e6cbd
- https://git.kernel.org/stable/c/5ffda7f3ed76ec8defc19d985e33b3b82ba07839
- https://git.kernel.org/stable/c/7ff8521f30c4c2fcd4e88bd7640486602bf8a650
References (11)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
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