CVE-2021-47602

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux02219b3abca59fca81711bfe7ee78df7abad97ce < 69f054d6642c8f6173724ce17e7ee3ff66b8f682affected
LinuxLinux02219b3abca59fca81711bfe7ee78df7abad97ce < 46b9e29db2012a4d2a40a26101862e002ccf387baffected
LinuxLinux02219b3abca59fca81711bfe7ee78df7abad97ce < eed897a22230e3231a740eddd7d6d95ba476625faffected
LinuxLinux02219b3abca59fca81711bfe7ee78df7abad97ce < 42d08e97b196479f593499e887a9ab81446a34b9affected
LinuxLinux02219b3abca59fca81711bfe7ee78df7abad97ce < d5e568c3a4ec2ddd23e7dc5ad5b0c64e4f22981aaffected
LinuxLinux3.19affected
LinuxLinux0 < 3.19unaffected
LinuxLinux4.19.222 <= 4.19.*unaffected
LinuxLinux5.4.168 <= 5.4.*unaffected
LinuxLinux5.10.88 <= 5.10.*unaffected
LinuxLinux5.15.11 <= 5.15.*unaffected
LinuxLinux5.16 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References