CVE-2021-46950: md/raid1: properly indicate failure when ending a failed write request
In the Linux kernel, the following vulnerability has been resolved:
md/raid1: properly indicate failure when ending a failed write request
This patch addresses a data corruption bug in raid1 arrays using bitmaps. Without this fix, the bitmap bits for the failed I/O end up being cleared.
Since we are in the failure leg of raid1endwriterequest, the request either needs to be retried (R1BIOWriteError) or failed (R1BIODegraded).
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2021-46950?
CVE-2021-46950 has a medium severity rating due to the risk of data corruption in raid1 arrays.
How do I fix CVE-2021-46950?
To fix CVE-2021-46950, you should update your Linux kernel to the latest version that addresses this vulnerability.
What versions of the Linux kernel are affected by CVE-2021-46950?
CVE-2021-46950 affects Linux kernel versions from 4.14.147 to 4.14.233, as well as several other versions up to 5.12.
What is the impact of CVE-2021-46950?
The impact of CVE-2021-46950 is data corruption during failed write operations in raid1 arrays.
Is CVE-2021-46950 specific to certain RAID configurations?
Yes, CVE-2021-46950 specifically impacts RAID 1 configurations using bitmaps.