What’s Vulnerable › Vulnerabilities

CVE-2026-98327: wifi: mac80211: mesh: reset the CSA state when leaving

• Severity: unknown
• 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: 2026-10-06 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: mesh: reset the CSA state when leaving ifmsh->csa is allocated in ieee80211_mesh_csa_beacon() and only freed in ieee80211_mesh_finish_csa(), i.e. when the channel switch completes. Leaving the mesh while a switch is still pending therefore leaks it. Additionally, ifmsh->csa_role and ifmsh->chsw_ttl have their state leak in this case, so things can get mixed up in addition to the memory leak. Refactor the reset and call it in ieee80211_stop_mesh() to fix it all.

Affected products

• Linux kernel: 3.13 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/860134b3af77970e006feab7e5decb8c84771c7f
• https://git.kernel.org/stable/c/aba8dfb45864441199748c33ce3c1c8ca121c8bd
• https://git.kernel.org/stable/c/ba5bf83a81e8832cb84bb3a2da67512f81f57a02
• https://git.kernel.org/stable/c/bd3b21145ae2e781daac1bbd19216a63ab4e0cbd

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