CVE-2021-47602

mac80211: track only QoS data frames for admission control

Description

In the Linux kernel, the following vulnerability has been resolved: mac80211: track only QoS data frames for admission control For admission control, obviously all of that only works for QoS data frames, otherwise we cannot even access the QoS field in the header. Syzbot reported (see below) an uninitialized value here due to a status of a non-QoS nullfunc packet, which isn't even long enough to contain the QoS header. Fix this to only do anything for QoS data packets.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.05%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/69f054d6642c8f6173724ce17e7ee3ff66b8f682 patch
https://git.kernel.org/stable/c/46b9e29db2012a4d2a40a26101862e002ccf387b patch
https://git.kernel.org/stable/c/eed897a22230e3231a740eddd7d6d95ba476625f patch
https://git.kernel.org/stable/c/42d08e97b196479f593499e887a9ab81446a34b9 patch
https://git.kernel.org/stable/c/d5e568c3a4ec2ddd23e7dc5ad5b0c64e4f22981a patch

Frequently Asked Questions

What is the severity of CVE-2021-47602?
CVE-2021-47602 has been scored as a medium severity vulnerability.
How to fix CVE-2021-47602?
To fix CVE-2021-47602, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-47602 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-47602 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-47602?
CVE-2021-47602 affects Linux Linux, Linux Linux.
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