Vulnerability Description
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!
References
- https://git.kernel.org/stable/c/c0e2dcbe54cb15ecdf9d8f4501c6720423243888
- https://git.kernel.org/stable/c/c97513cddcfc235f2522617980838e500af21d01
FAQ
What is CVE-2025-68250?
CVE-2025-68250 is a documented vulnerability. 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...
How severe is CVE-2025-68250?
CVSS scoring is not yet available for CVE-2025-68250. Check NVD for updates.
Is there a patch for CVE-2025-68250?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.