What’s Vulnerable › Vulnerabilities

CVE-2023-53209: wifi: mac80211_hwsim: Fix possible NULL dereference

• 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: 2025-09-15 · updated 2026-06-17
• Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: Fix possible NULL dereference In a call to mac80211_hwsim_select_tx_link() the sta pointer might be NULL, thus need to check that it is not NULL before accessing it.

Affected products

• Linux kernel: before 6.1.42; from 6.2 before 6.4.7 — fixed in 6.1.42, 6.4.7

How to fix

Upgrade to a fixed version: Linux kernel 6.1.42, 6.4.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0cc80943ef518a1c51a1111e9346d1daf11dd545
• https://git.kernel.org/stable/c/a8a20fed3e05b3a6866c5c58855deaf3c217ccd6
• https://git.kernel.org/stable/c/d0124848c7940aba73492e282506b32a13f2e30e

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