Access of Uninitialized Pointer Affecting kernel-azure package, versions <5.14.21-150500.33.60.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.04% (6th percentile)

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  • Snyk IDSNYK-SLES155-KERNELAZURE-7434869
  • published10 Jul 2024
  • disclosed9 Jul 2024

Introduced: 9 Jul 2024

CVE-2021-47602  (opens in a new tab)
CWE-824  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 kernel-azure to version 5.14.21-150500.33.60.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-azure package and not the kernel-azure package as distributed by SLES. See How to fix? for SLES:15.5 relevant fixed versions and status.

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.

CVSS Scores

version 3.1