CVE-2025-38565 Information

Aug 20, 2025 cve

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.

Reference

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/7ff8521f30c4c2fcd4e88bd7640486602bf8a650 https://git.kernel.org/stable/c/92043120a2e992800580855498ab8507e1b22db9 https://git.kernel.org/stable/c/f41e9eba77bf97626e04296dc5677d02816d2432

CNNVD-202508-2130 (Published: 2025-08-19)

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