CVE-2026-46045
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
A vulnerability has been identified in the Linux kernel that allows reading bitmap data from spare disks that are not fully synchronized. The lack of an In_sync flag check may lead to reading stale or uninitialized bitmap data.
Risk Assessment
Reading incorrect bitmap data can lead to improper dirty bit tracking, potentially resulting in data corruption during recovery or normal system operation.
Recommendation
It is recommended to add the In_sync flag check to ensure that bitmap pages are only read from fully synchronized member disks that have valid bitmap data.
Original NVD description (English source)
In 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.