CVE-2021-46950: md/raid1: properly indicate failure when ending a failed write request
First published: Tue Feb 27 2024(Updated: )
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 raid1_end_write_request, the request either needs to be retried (R1BIO_WriteError) or failed (R1BIO_Degraded).
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=4.14.147<4.14.233 | |
| Linux Kernel | >=4.19.77<4.19.191 | |
| Linux Kernel | >=5.2.19<5.3 | |
| Linux Kernel | >=5.3.4<5.4.118 | |
| Linux Kernel | >=5.5<5.10.36 | |
| Linux Kernel | >=5.11<5.11.20 | |
| Linux Kernel | >=5.12<5.12.3 |
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Reference Links
- https://git.kernel.org/stable/c/12216d0919b64ee2ea5dc7a50e455670f44383d5
- https://git.kernel.org/stable/c/a6e17cab00fc5bf85472434c52ac751426257c6f
- https://git.kernel.org/stable/c/6920cef604fa57f9409e3960413e9cc11f5c5a40
- https://git.kernel.org/stable/c/661061a45e32d8b2cc0e306da9f169ad44011382
- https://git.kernel.org/stable/c/59452e551784b7a57a45d971727e9db63b192515
- https://git.kernel.org/stable/c/538244fba59fde17186322776247cd9c05be86dd
- https://git.kernel.org/stable/c/2417b9869b81882ab90fd5ed1081a1cb2d4db1dd
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.
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- version/linux kernel/4.14.147
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