NULL Pointer Dereference Affecting kernel-syms package, versions <5.3.18-150300.59.211.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.01% (1st percentile)

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  • Snyk IDSNYK-SLES153-KERNELSYMS-10743796
  • published15 Jul 2025
  • disclosed14 Jul 2025

Introduced: 14 Jul 2025

CVE-2022-49942  (opens in a new tab)
CWE-476  (opens in a new tab)

How to fix?

Upgrade SLES:15.3 kernel-syms to version 5.3.18-150300.59.211.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-syms package and not the kernel-syms package as distributed by SLES. See How to fix? for SLES:15.3 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

wifi: mac80211: Don't finalize CSA in IBSS mode if state is disconnected

When we are not connected to a channel, sending channel "switch" announcement doesn't make any sense.

The BSS list is empty in that case. This causes the for loop in cfg80211_get_bss() to be bypassed, so the function returns NULL (check line 1424 of net/wireless/scan.c), causing the WARN_ON() in ieee80211_ibss_csa_beacon() to get triggered (check line 500 of net/mac80211/ibss.c), which was consequently reported on the syzkaller dashboard.

Thus, check if we have an existing connection before generating the CSA beacon in ieee80211_ibss_finish_csa().

CVSS Base Scores

version 3.1