# CVE-2025-68250: linux: In the Linux kernel, the following vulnerability has been resolved:  hung_task: fix warnings caused by unaligned lock...

CVE-2025-68250 is fixed in linux on 1 platform by DEBIAN-CVE-2025-68250 (version 6.17.6-1), released December 16, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-68250
- Priority: High
- CVSS: 8.2 (high)
- EPSS: 0.0031
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 16, 2025

## 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!

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.17.6-1 | [DEBIAN-CVE-2025-68250](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68250.md) | Dec 16, 2025 |

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