md/md-llbitmap: skip reading rdevs that are not in_sync

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Summary

CVECVE-2026-46045
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:23 UTC
Updated2026-05-27 14:48:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: md/md-llbitmap: skip reading rdevs that are not in_sync When reading bitmap pages from member disks, the code iterates through all rdevs and attempts to read from the first available one. However, it only checks for raid_disk assignment and Faulty flag, missing the In_sync flag check. This can cause bitmap data to be read from spare disks that are still being rebuilt and don't have valid bitmap information yet. Reading stale or uninitialized bitmap data from such disks can lead to incorrect dirty bit tracking, potentially causing data corruption during recovery or normal operation. Add the In_sync flag check to ensure bitmap pages are only read from fully synchronized member disks that have valid bitmap data.

Risk And Classification

EPSS: 0.000170000 probability, percentile 0.042650000 (date 2026-06-01)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 5ab829f1971dc99f2aac10846c378e67fc875abc 98623c7e2a51eab1833c8628d33fa9c6ef3ce325 git Not specified
CNA Linux Linux affected 5ab829f1971dc99f2aac10846c378e67fc875abc 3115fa2f62970d98f2a639145fb8e2767db8bbf9 git Not specified
CNA Linux Linux affected 5ab829f1971dc99f2aac10846c378e67fc875abc 7701e68b5072faa03a8f30b4081dc16df9092381 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/98623c7e2a51eab1833c8628d33fa9c6ef3ce325 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3115fa2f62970d98f2a639145fb8e2767db8bbf9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7701e68b5072faa03a8f30b4081dc16df9092381 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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