🛡️ CVE-2025-68329 — kernel

⚪ Unknown ✅ No Known Exploit NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

tracing: Fix WARN_ON in tracing_buffers_mmap_close for split VMAs

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

tracing: Fix WARN_ON in tracing_buffers_mmap_close for split VMAs

When a VMA is split (e.g., by partial munmap or MAP_FIXED), the kernel

calls vm_ops->close on each portion. For trace buffer mappings, this

results in ring_buffer_unmap() being called multiple times while

ring_buffer_map() was only called once.

This causes ring_buffer_unmap() to return -ENODEV on subsequent calls

because user_mapped is already 0, triggering a WARN_ON.

Trace buffer mappings cannot support partial mappings because the ring

buffer structure requires the complete buffer including the meta page.

Fix this by adding a may_split callback that returns -EINVAL to prevent

VMA splits entirely.

Affected software

CVE-2025-68329 is recorded against 2 packages.

  • kernel (from 6.13.0 up to 6.17.11)
  • unknown

Timeline and source

Published on 22 December 2025 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2025-68329 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-12-22
Updated 2026-08-12
Modified 2026-07-15
Fix URL N/A

Affected Packages

Software From version Fixed in
kernel 6.13.0 6.17.11
unknown — —

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