CVE-2026-53063

Summary

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

dm cache: fix write hang in passthrough mode

The invalidate_remove() function has incomplete logic for handling write hit bios after cache invalidation. It sets up the remapping for the overwrite_bio but then drops it immediately without submission, causing write operations to hang.

Fix by adding a new invalidate_committed() continuation that submits the remapped writes to the cache origin after metadata commit completes, while using the overwrite_endio hook to ensure proper completion sequencing. This maintains existing coherency. Also improve error handling in invalidate_complete() to preserve the original error status instead of using bio_io_error() unconditionally.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/9fa18d0b981776b190ca4632942a7c2174052b78
• https://git.kernel.org/stable/c/ecb10c193cbebf5e6984246a9b4ff1f95d45ed87
• https://git.kernel.org/stable/c/64d6519b00be4116d365bd31f33a5e5ce2944c1a
• https://git.kernel.org/stable/c/b8ace9e96983abb20ccf39edce8a60f1bb0b83d8
• https://git.kernel.org/stable/c/05798d091ebcfb6d68228890e593f209e8ac940d
• https://git.kernel.org/stable/c/4ca8b8bd952df7c3ccdc68af9bd3419d0839a04b

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