CVE-2021-47166: NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce()
First published: Mon Mar 25 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: NFS: Don't corrupt the value of pg_bytes_written in nfs_do_recoalesce() The value of mirror->pg_bytes_written should only be updated after a successful attempt to flush out the requests on the list.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=4.0<4.4.271 | |
| Linux Kernel | >=4.5<4.9.271 | |
| Linux Kernel | >=4.10<4.14.235 | |
| Linux Kernel | >=4.15<4.19.193 | |
| Linux Kernel | >=4.20<5.4.124 | |
| Linux Kernel | >=5.5<5.10.42 | |
| Linux Kernel | >=5.11<5.12.9 | |
| Linux Kernel | =5.13-rc1 | |
| Linux Kernel | =5.13-rc2 | |
| Linux Kernel | =5.13-rc3 |
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Reference Links
- https://git.kernel.org/stable/c/e8b8418ce14ae66ee55179901edd12191ab06a9e
- https://git.kernel.org/stable/c/b291baae24f876acd5a5dd57d0bb2bbac8a68b0c
- https://git.kernel.org/stable/c/c757c1f1e65d89429db1409429436cf40d47c008
- https://git.kernel.org/stable/c/40f139a6d50c232c0d1fd1c5e65a845c62db0ede
- https://git.kernel.org/stable/c/785917316b25685c9b3a2a88f933139f2de75e33
- https://git.kernel.org/stable/c/7087db95c0a06ab201b8ebfac6a7ec1e34257997
- https://git.kernel.org/stable/c/2fe1cac336b55a1f79e603e9ce3552c3623e90eb
- https://git.kernel.org/stable/c/0d0ea309357dea0d85a82815f02157eb7fcda39f
Frequently Asked Questions
What is the severity of CVE-2021-47166?
CVE-2021-47166 is rated as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2021-47166?
To fix CVE-2021-47166, upgrade the Linux kernel to the latest version that addresses this vulnerability.
What systems are affected by CVE-2021-47166?
CVE-2021-47166 affects various versions of the Linux kernel between 4.0 and 5.13 release candidates.
What are the potential impacts of CVE-2021-47166?
Exploitation of CVE-2021-47166 could lead to data corruption or loss of stability in systems utilizing NFS.
Is there a workaround for CVE-2021-47166?
Currently, the recommended approach for CVE-2021-47166 is to apply the necessary kernel updates rather than using a workaround.
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