Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.0, < 5.4.297 |
| Debian | Debian Linux | 11.0 |
References
- https://git.kernel.org/stable/c/07091aade394f690e7b655578140ef84d0e8d7b0Patch
- https://git.kernel.org/stable/c/163b0d1a209fe0df5476c1df2330ca12b55abf92Patch
- https://git.kernel.org/stable/c/27d44145bd576bbef9bf6165bcd78128ec3e6cbdPatch
- https://git.kernel.org/stable/c/5ffda7f3ed76ec8defc19d985e33b3b82ba07839Patch
- https://git.kernel.org/stable/c/7ff8521f30c4c2fcd4e88bd7640486602bf8a650Patch
- https://git.kernel.org/stable/c/92043120a2e992800580855498ab8507e1b22db9Patch
- https://git.kernel.org/stable/c/9b90a48c7de828a15c7a4fc565d46999c6e22d6bPatch
- https://git.kernel.org/stable/c/de85e72598d89880a02170a1cbc27b35a7d978a9Patch
- https://git.kernel.org/stable/c/f41e9eba77bf97626e04296dc5677d02816d2432Patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2025-38565?
CVE-2025-38565 is a vulnerability with a CVSS score of 7.8 (HIGH). 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() callbac...
How severe is CVE-2025-38565?
CVE-2025-38565 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-38565?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.