CVE-2025-68250
- Source
- https://cve.org/CVERecord?id=CVE-2025-68250
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68250.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-68250
- Downstream
- Published
- 2025-12-16T14:32:17.173Z
- Modified
- 2026-04-02T13:03:27.208203Z
- Summary
- hung_task: fix warnings caused by unaligned lock pointers
- Details
-
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 WARNONONCE 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!
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68250.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/c0e2dcbe54cb15ecdf9d8f4501c6720423243888
- https://git.kernel.org/stable/c/c97513cddcfc235f2522617980838e500af21d01
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68250.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-68250
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git