CVE-2026-53257: wifi: cfg80211: enforce HE/EHT cap/oper consistency

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: 2026-06-25 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: enforce HE/EHT cap/oper consistency Xiang Mei reports that mac80211 could crash if eht_cap is set but eht_oper isn't. Rather than fixing that for the individual user(s), enforce that both HE/EHT have consistent elements.

Affected products

Linux kernel: from 6.16 before 7.0.13; 7.1-rc1, 7.1-rc2, 7.1-rc3, 7.1-rc4, 7.1-rc5, 7.1-rc6 — fixed in 7.0.13

How to fix

Upgrade to a fixed version: Linux kernel 7.0.13. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/0f5e9ddd7e8e7758771a63cdd498a2007dc8da7a
https://git.kernel.org/stable/c/afe815a67ec8f2fd03c261fb64f5cde7eb05c17a
https://git.kernel.org/stable/c/cb9959ab5f99611d27a06586add84811fe8102dc

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