CVE-2021-47168

MEDIUM
Published Mar 25, 2024 Modified Mar 17, 2025 CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: NFS: fix an incorrect limit in filelayout_decode_layout() The "sizeof(struct nfs_fh)" is two bytes too large and could lead to memory corruption. It should be NFS_MAXFHSIZE because that's the size of the ->data[] buffer. I reversed the size of the arguments to put the variable on the left.

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CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel

References

Advisories & Patches

https://git.kernel.org/stable/c/769b01ea68b6c49dc3cde6adf7e53927dacbd3a8 https://git.kernel.org/stable/c/945ebef997227ca8c20bad7f8a8358c8ee57a84a https://git.kernel.org/stable/c/9b367fe770b1b80d7bf64ed0d177544a44405f6e https://git.kernel.org/stable/c/9d280ab53df1d4a1043bd7a9e7c6a2f9cfbfe040 https://git.kernel.org/stable/c/b287521e9e94bb342ebe5fd8c3fd7db9aef4e6f1 https://git.kernel.org/stable/c/d34fb628f6ef522f996205a9e578216bbee09e84 https://git.kernel.org/stable/c/e411df81cd862ef3d5b878120b2a2fef0ca9cdb1 https://git.kernel.org/stable/c/f299522eda1566cbfbae4b15c82970fc41b03714 https://git.kernel.org/stable/c/769b01ea68b6c49dc3cde6adf7e53927dacbd3a8 https://git.kernel.org/stable/c/945ebef997227ca8c20bad7f8a8358c8ee57a84a https://git.kernel.org/stable/c/9b367fe770b1b80d7bf64ed0d177544a44405f6e https://git.kernel.org/stable/c/9d280ab53df1d4a1043bd7a9e7c6a2f9cfbfe040 https://git.kernel.org/stable/c/b287521e9e94bb342ebe5fd8c3fd7db9aef4e6f1 https://git.kernel.org/stable/c/d34fb628f6ef522f996205a9e578216bbee09e84 https://git.kernel.org/stable/c/e411df81cd862ef3d5b878120b2a2fef0ca9cdb1 https://git.kernel.org/stable/c/f299522eda1566cbfbae4b15c82970fc41b03714

Frequently Asked Questions

What is CVE-2021-47168? +
In the Linux kernel, the following vulnerability has been resolved: NFS: fix an incorrect limit in filelayout_decode_layout() The "sizeof(struct nfs_fh)" is two bytes too large and could lead to memory corruption. It should be NFS_MAXFHSIZE because that's the size of the ->data[] buffer. I reversed the size of the arguments to put the variable on the left. It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2021-47168? +
CVE-2021-47168 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2021-47168? +
CVE-2021-47168 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2021-47168? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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