CVE-2026-72439

Summary

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

md/raid10: fix writes_pending leak on write request failures

raid10_make_request() acquires a writes_pending reference with md_write_start() before dispatching write requests. Several failure paths in raid10_write_request() complete the bio and return without reaching the normal write completion path, causing the corresponding md_write_end() to be skipped.

Make raid10_write_request() return a status indicating whether the write request was successfully queued. This allows raid10_make_request() to release the writes_pending reference with md_write_end() when a write request fails.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/f94031c94eaebe14a7c9e91720064de0c5a54a6c
• https://git.kernel.org/stable/c/e045d6ed33f8faa3e3dd6dc33c62ec01e3ad275d

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