NULL Pointer Dereference Affecting gfs2-kmp-default package, versions <5.14.21-150500.55.88.1


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-GFS2KMPDEFAULT-8523074
  • published18 Dec 2024
  • disclosed17 Dec 2024

Introduced: 17 Dec 2024

NewCVE-2024-47712  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade SLES:15.5 gfs2-kmp-default to version 5.14.21-150500.55.88.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gfs2-kmp-default package and not the gfs2-kmp-default 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:

wifi: wilc1000: fix potential RCU dereference issue in wilc_parse_join_bss_param

In the wilc_parse_join_bss_param function, the TSF field of the ies structure is accessed after the RCU read-side critical section is unlocked. According to RCU usage rules, this is illegal. Reusing this pointer can lead to unpredictable behavior, including accessing memory that has been updated or causing use-after-free issues.

This possible bug was identified using a static analysis tool developed by myself, specifically designed to detect RCU-related issues.

To address this, the TSF value is now stored in a local variable ies_tsf before the RCU lock is released. The param-&gt;tsf_lo field is then assigned using this local variable, ensuring that the TSF value is safely accessed.

CVSS Scores

version 3.1