What’s Vulnerable › Vulnerabilities

CVE-2023-53113: wifi: nl80211: fix NULL-ptr deref in offchan check

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-02 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: nl80211: fix NULL-ptr deref in offchan check If, e.g. in AP mode, the link was already created by userspace but not activated yet, it has a chandef but the chandef isn't valid and has no channel. Check for this and ignore this link.

Affected products

• Linux kernel: from 5.19.2 before 6.1.21; from 6.2 before 6.2.8; 6.3-rc1, 6.3-rc2 — fixed in 6.1.21, 6.2.8

How to fix

Upgrade to a fixed version: Linux kernel 6.1.21, 6.2.8. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/201a836c2385fdd2b9d0a8e7737bba5b26f1863a
• https://git.kernel.org/stable/c/87e80ea4fbc9ce2f2005905fdbcd38baaa47463a
• https://git.kernel.org/stable/c/f624bb6fad23df3270580b4fcef415c6e7bf7705

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