CVE-2022-49280: NFSD: prevent underflow in nfssvc_decode_writeargs()
First published: Wed Feb 26 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: NFSD: prevent underflow in nfssvc_decode_writeargs() Smatch complains: fs/nfsd/nfsxdr.c:341 nfssvc_decode_writeargs() warn: no lower bound on 'args->len' Change the type to unsigned to prevent this issue.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Linux Kernel | <4.9.311 | |
| Linux Kernel | >=4.10<4.14.276 | |
| Linux Kernel | >=4.15<4.19.238 | |
| Linux Kernel | >=4.20<5.4.189 | |
| Linux Kernel | >=5.5<5.10.110 | |
| Linux Kernel | >=5.11<5.15.33 | |
| Linux Kernel | >=5.16<5.16.19 | |
| Linux Kernel | >=5.17<5.17.2 |
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Reference Links
- https://git.kernel.org/stable/c/1a33e0de60feda402d05ac8a6cf409c19ea3e0b3
- https://git.kernel.org/stable/c/438068f4912183a59fcb6b7496a06437f7fd4e2b
- https://git.kernel.org/stable/c/9f0f048c1bfa7867d565a95fd8c28f4484ba1043
- https://git.kernel.org/stable/c/85259340fc9bd54e3d567b41b881ecb4d0055da1
- https://git.kernel.org/stable/c/65e21cc042f4c1518c8c55283f53bc725b78419d
- https://git.kernel.org/stable/c/614a61e1592051cc42d3c38f899c9f7bdaad8a1d
- https://git.kernel.org/stable/c/2764af8ce0bf03cc43ee4a11897cab96bde6caae
- https://git.kernel.org/stable/c/413d8fefafe531a9442bb623e3fe292a38f88d65
- https://git.kernel.org/stable/c/184416d4b98509fb4c3d8fc3d6dc1437896cc159
Frequently Asked Questions
What is the severity of CVE-2022-49280?
CVE-2022-49280 is considered a moderate severity vulnerability in the Linux kernel.
How do I fix CVE-2022-49280?
To fix CVE-2022-49280, update your Linux kernel to a version higher than 4.9.311 or apply the relevant patches provided by the Linux community.
What specific area of the Linux kernel is affected by CVE-2022-49280?
CVE-2022-49280 affects the NFSD (NFS daemon) code specifically in the function nfssvc_decode_writeargs().
Can CVE-2022-49280 lead to any security breaches?
While CVE-2022-49280 does not directly allow remote code execution, it can potentially lead to destabilization of services using NFS.
What Linux kernel versions are vulnerable to CVE-2022-49280?
Linux kernel versions prior to 4.9.311 and between 4.10 to 5.17.2 are vulnerable to CVE-2022-49280.
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