CVE-2021-47602
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.
02 / AFFECTED SOFTWARE
Affected packages
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/stable/c/42d08e97b196479f593499e887a9ab81446a34b9
- https://git.kernel.org/stable/c/46b9e29db2012a4d2a40a26101862e002ccf387b
- https://git.kernel.org/stable/c/69f054d6642c8f6173724ce17e7ee3ff66b8f682
- https://git.kernel.org/stable/c/d5e568c3a4ec2ddd23e7dc5ad5b0c64e4f22981a
- https://git.kernel.org/stable/c/eed897a22230e3231a740eddd7d6d95ba476625f