CVE-2025-38564 Affecting kernel-zfcpdump-modules package, versions *


Severity

Recommended
low

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.02% (5th percentile)

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  • Snyk IDSNYK-RHEL10-KERNELZFCPDUMPMODULES-12092932
  • published21 Aug 2025
  • disclosed19 Aug 2025

Introduced: 19 Aug 2025

NewCVE-2025-38564  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 kernel-zfcpdump-modules.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-zfcpdump-modules package and not the kernel-zfcpdump-modules package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

perf/core: Handle buffer mapping fail correctly in perf_mmap()

After successful allocation of a buffer or a successful attachment to an existing buffer perf_mmap() tries to map the buffer read only into the page table. If that fails, the already set up page table entries are zapped, but the other perf specific side effects of that failure are not handled. The calling code just cleans up the VMA and does not invoke perf_mmap_close().

This leaks reference counts, corrupts user->vm accounting and also results in an unbalanced invocation of event::event_mapped().

Cure this by moving the event::event_mapped() invocation before the map_range() call so that on map_range() failure perf_mmap_close() can be invoked without causing an unbalanced event::event_unmapped() call.

perf_mmap_close() undoes the reference counts and eventually frees buffers.

CVSS Base Scores

version 3.1