CVE-2026-46051
Description
In the Linux kernel, the following vulnerability has been resolved: md/raid5: fix soft lockup in retry_aligned_read() When retry_aligned_read() encounters an overlapped stripe, it releases the stripe via raid5_release_stripe() which puts it on the lockless released_stripes llist. In the next raid5d loop iteration, release_stripe_list() drains the stripe onto handle_list (since STRIPE_HANDLE is set by the original IO), but retry_aligned_read() runs before handle_active_stripes() and removes the stripe from handle_list via find_get_stripe() -> list_del_init(). This prevents handle_stripe() from ever processing the stripe to resolve the overlap, causing an infinite loop and soft lockup. Fix this by using __release_stripe() with temp_inactive_list instead of raid5_release_stripe() in the failure path, so the stripe does not go through the released_stripes llist. This allows raid5d to break out of its loop, and the overlap will be resolved when the stripe is eventually processed by handle_stripe().
How to fix
- linux linux_kernel5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4 or later
- git.kernel.org/stable/c/09880592f5a9dc73377d6eb5ac123537b5f8df49
- git.kernel.org/stable/c/1985cb3247e87ff6b8ca4bc5f9626f4f51024507
- git.kernel.org/stable/c/4166d5234fe8b6c3c7f796a6c198605356c5b355
- git.kernel.org/stable/c/66df9f30673db66ac35145820a8e24906069ae57
- git.kernel.org/stable/c/7f9f7c697474268d9ef9479df3ddfe7cdcfbbffc
- git.kernel.org/stable/c/80fc6ca2cbde018d52e13f305edcd643911bd94b
- git.kernel.org/stable/c/883cc33b7af1c448663287f069ef9dfea001e90f
- git.kernel.org/stable/c/a9055300e07d9d6800264d3c2560e1d0144689ca
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.12 ≤ v < 5.10.258, 5.11 ≤ v < 5.15.209, 5.16 ≤ v < 6.1.175, 6.2 ≤ v < 6.6.140, 6.7 ≤ v < 6.12.86, 6.13 ≤ v < 6.18.27, 6.19 ≤ v < 7.0.4 | 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4 |
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