CVE-2026-74372

Summary

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

raid1: fix nr_pending leak in REQ_ATOMIC bad-block error path

In raid1_write_request(), each per-mirror loop iteration begins by incrementing rdev->nr_pending. If a REQ_ATOMIC write encounters a badblock within the requested range, the code jumps to err_handle without dropping the reference taken for the current mirror.

err_handle's cleanup loop will only decrements for k < i and r1_bio->bios[k] is non-NULL. The current slot is therefore skipped, leaving its nr_pending reference leaked permanently. The reference prevents the rdev from ever being removed, since raid1_remove_conf() refuses to remove an rdev with nr_pending > 0.

Fix this by calling rdev_dec_pending() before jumping to err_handle.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/5ac9e793ba2583d72740d929e7858a6c82e22ed5
• https://git.kernel.org/stable/c/731485617bf862f1289c3f40ed1f800d0475826f
• https://git.kernel.org/stable/c/909d9dc3b5730c8ed7b764c68bc788342df2a07b

• ←Previous
• Next→