CVE-2022-49646: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix queue selection for mesh/OCB interfaces When using iTXQ, the code assumes that there is only one vif queue for broadcast packets, using the BE queue. Allowing non-BE queue marking violates that assumption and txq->ac == skb_queue_mapping is no longer guaranteed. This can cause issues with queue handling in the driver and also causes issues with the recent ATF change, resulting in an AQL underflow warning.

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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	5.2 — 5.4.207
linux	linux_kernel	5.5 — 5.10.132
linux	linux_kernel	5.11 — 5.15.56
linux	linux_kernel	5.16 — 5.18.13
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/41ecab279a70dced9005f4d55fa0fcde8938603f https://git.kernel.org/stable/c/444be5a02b77f3b7a8ac9c1a0b074fbb3bd89cd0 https://git.kernel.org/stable/c/50e2ab39291947b6c6c7025cf01707c270fcde59 https://git.kernel.org/stable/c/5a9df31017999197b6e60535940f2f2fe1bd3b0d https://git.kernel.org/stable/c/e013ea2a51a94b903b396a8dff531a07d470335d

Frequently Asked Questions

What is CVE-2022-49646? +

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix queue selection for mesh/OCB interfaces When using iTXQ, the code assumes that there is only one vif queue for broadcast packets, using the BE queue. Allowing non-BE queue marking violates that assumption and txq->ac == skb_queue_mapping is no longer guaranteed. This can cause issues with queue handling in the driver and also causes issues with the recent ATF change, resulting in an AQL underflow warning. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49646? +

CVE-2022-49646 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-2022-49646? +

CVE-2022-49646 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-2022-49646? +

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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