What’s Vulnerable › Vulnerabilities

CVE-2022-50533: wifi: mac80211: mlme: fix null-ptr deref on failed assoc

• 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: 2025-10-07 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: mlme: fix null-ptr deref on failed assoc If association to an AP without a link 0 fails, then we crash in tracing because it assumes that either ap_mld_addr or link 0 BSS is valid, since we clear sdata->vif.valid_links and then don't add the ap_mld_addr to the struct. Since we clear also sdata->vif.cfg.ap_addr, keep a local copy of it and assign it earlier, before clearing valid_links, to fix this.

Affected products

• Linux kernel: from 6.0 before 6.0.16; from 6.1 before 6.1.2 — fixed in 6.0.16, 6.1.2

How to fix

Upgrade to a fixed version: Linux kernel 6.0.16, 6.1.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/78a6a43aaf87180ec7425a2a90468e1b4d09a1ec
• https://git.kernel.org/stable/c/bb7743955a929e44b308cc3f63f8cc03873c1bee
• https://git.kernel.org/stable/c/c695dfba8dfb82dc7ace4f22be088916cbf621ca

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