CVE-2026-45953
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 versions
Linux kernel versions
6.18
and later are affected. Fixed in
6.18.14,
6.19.4,
7.0
and their respective stable series.
References
The following references provide additional information about CVE-2026-45953 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/28ef299e7a5b81817f8ca8297c2ddff28f5da5e8
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PatchKernel patch commithttps://git.kernel.org/stable/c/870b9f15867b0e70f3459ef3974b043e8b229690
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PatchKernel patch commithttps://git.kernel.org/stable/c/cd1635d844d26471c56c0a432abdee12fc9ad735
Frequently asked questions
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What is CVE-2026-45953?
CVE-2026-45953 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.18 onward and has been patched in 6.18.14, 6.19.4 and 7.0. CVE-2026-45953 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-45953?
Yes — CVE-2026-45953 has been patched. Fixed versions include 6.18.14, 6.19.4 and 7.0. If you are running Linux kernel 6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-45953 actively exploited?
No — CVE-2026-45953 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.