VDB

DEBIAN-CVE-2025-68250

DEBIAN-CVE-2025-68250 PUBLISHED

In the Linux kernel, the following vulnerability has been resolved: hung_task: fix warnings caused by unaligned lock pointers The blocker tracking mechanism assumes that lock pointers are at least 4-byte aligned to use their lower bits for type encoding. However, as reported by Eero Tamminen, some architectures like m68k only guarantee 2-byte alignment of 32-bit values. This breaks the assumption and causes two related WARN_ON_ONCE checks to trigger. To fix this, the runtime checks are adjusted to silently ignore any lock that is not 4-byte aligned, effectively disabling the feature in such cases and avoiding the related warnings. Thanks to Geert Uytterhoeven for bisecting!

Affected Products

VendorProductVersions
Debian:14linux0, 6.12.38-1, 6.12.41-1

Timeline

  • Dec 16, 2025 CVE Published
  • Apr 28, 2026 CVE Updated
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