What’s Vulnerable › Vulnerabilities

CVE-2025-71227: wifi: mac80211: don't WARN for connections on invalid channels

• 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: 2026-02-18 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: don't WARN for connections on invalid channels It's not clear (to me) how exactly syzbot managed to hit this, but it seems conceivable that e.g. regulatory changed and has disabled a channel between scanning (channel is checked to be usable by cfg80211_get_ies_channel_number) and connecting on the channel later. With one scenario that isn't covered elsewhere described above, the warning isn't good, replace it with a (more informative) error message.

Affected products

• Linux kernel: from 3.8 before 6.18.10; 6.19-rc1, 6.19-rc2, 6.19-rc3 — fixed in 6.18.10
• Linux: 3.8 — fixed in 6.19

How to fix

Upgrade to a fixed version: Linux kernel 6.18.10; Linux 6.19. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/10d3ff7e5812c8d70300f6fa8f524009a06aa7e1
• https://git.kernel.org/stable/c/579cf5939f8f4c4f88c75862d0c573fb13567b74
• https://git.kernel.org/stable/c/6acc2d23f13d60874981b4828ba156ba01c86510
• https://git.kernel.org/stable/c/99067b58a408a384d2a45c105eb3dce980a862ce
• https://git.kernel.org/stable/c/c02b1d244a5d799696ca74d3fba6539c8d76195f

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