What’s Vulnerable › Vulnerabilities

CVE-2026-46166: wifi: mac80211: use safe list iteration in radar detect work

• Severity: high (CVSS 8.8 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: 2026-05-28 · updated 2026-10-19
• Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: use safe list iteration in radar detect work The call to ieee80211_dfs_cac_cancel can cause the iterated chanctx to be freed and removed from the list. Guard against this to avoid a slab-use-after-free error.

Affected products

• Linux kernel: from 6.12 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.7; 7.1-rc1, 7.1-rc2 — fixed in 6.12.88, 6.18.30, 7.0.7

How to fix

Upgrade to a fixed version: Linux kernel 6.12.88, 6.18.30, 7.0.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/120149fb3ebcf674832ca3cafd32bedcdb686dde
• https://git.kernel.org/stable/c/7577a4b8a10fab45a6ee2045ea038a5adadbb585
• https://git.kernel.org/stable/c/887ece6c23b49d02a6678e7a8d5ad213d75883ce
• https://git.kernel.org/stable/c/ac8eb3e18f41e2cc8492cc1d358bcb786c850270
• https://access.redhat.com/errata/RHSA-2026:27288
• https://access.redhat.com/errata/RHSA-2026:27708
• https://access.redhat.com/errata/RHSA-2026:27789
• https://access.redhat.com/errata/RHSA-2026:33215
• https://access.redhat.com/security/cve/CVE-2026-46166
• https://bugzilla.redhat.com/show_bug.cgi?id=2482645
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46166.json

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