CVE-2026-45953

Summary

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

md/raid5: fix IO hang with degraded array with llbitmap

When llbitmap bit state is still unwritten, any new write should force rcw, as bitmap_ops->blocks_synced() is checked in handle_stripe_dirtying(). However, later the same check is missing in need_this_block(), causing stripe to deadloop during handling because handle_stripe() will decide to go to handle_stripe_fill(), meanwhile need_this_block() always return 0 and nothing is handled.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/870b9f15867b0e70f3459ef3974b043e8b229690
• https://git.kernel.org/stable/c/28ef299e7a5b81817f8ca8297c2ddff28f5da5e8
• https://git.kernel.org/stable/c/cd1635d844d26471c56c0a432abdee12fc9ad735

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