CVE-2021-47167: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix an Oopsable condition in __nfs_pageio_add_request() Ensure that nfs_pageio_error_cleanup() resets the mirror array contents, so that the structure reflects the fact that it is now empty. Also change the test in nfs_pageio_do_add_request() to be more robust by checking whether or not the list is empty rather than relying on the value of pg_count.

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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

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.0 — 5.4.124
linux	linux_kernel	5.5 — 5.10.42
linux	linux_kernel	5.11 — 5.12.9
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/15ac6f14787649e8ebd75c142e2c5d2a243c8490 https://git.kernel.org/stable/c/1fc5f4eb9d31268ac3ce152d74ad5501ad24ca3e https://git.kernel.org/stable/c/56517ab958b7c11030e626250c00b9b1a24b41eb https://git.kernel.org/stable/c/ee21cd3aa8548e0cbc8c67a80b62113aedd2d101 https://git.kernel.org/stable/c/15ac6f14787649e8ebd75c142e2c5d2a243c8490 https://git.kernel.org/stable/c/1fc5f4eb9d31268ac3ce152d74ad5501ad24ca3e https://git.kernel.org/stable/c/56517ab958b7c11030e626250c00b9b1a24b41eb https://git.kernel.org/stable/c/ee21cd3aa8548e0cbc8c67a80b62113aedd2d101

Frequently Asked Questions

What is CVE-2021-47167? +

In the Linux kernel, the following vulnerability has been resolved: NFS: Fix an Oopsable condition in __nfs_pageio_add_request() Ensure that nfs_pageio_error_cleanup() resets the mirror array contents, so that the structure reflects the fact that it is now empty. Also change the test in nfs_pageio_do_add_request() to be more robust by checking whether or not the list is empty rather than relying on the value of pg_count. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2021-47167? +

CVE-2021-47167 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-2021-47167? +

CVE-2021-47167 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-2021-47167? +

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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CVE-2021-47167