CVE-2021-47602
mac80211: track only QoS data frames for admission control
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- 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
References (5)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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