Improper handling of exceptional conditions in Linux kernel - CVE-2026-98334

Vulnerability details

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper handling of failure conditions in the mac80211 ieee80211_start_ap() function when access point startup fails after setting beaconing state. A local user can trigger a failed access point startup followed by scanning to cause a denial of service.

The divide error was observed with the mac80211_hwsim driver.

Affected software

How to mitigate CVE-2026-98334

External References

• https://git.kernel.org/stable/c/3f28551d0241254a75626d868041c6340285088b
• https://git.kernel.org/stable/c/5d5ff5b36f5748a2a077f875a73ccb26860d3fcc
• https://git.kernel.org/stable/c/6eac225f59c1c2277ac74f8a716d6df0ba3b8d28
• https://git.kernel.org/stable/c/d83da43e9b3b3b1bad99ac5a1065f1c63ad5fc32

Related Security Bulletins

• Improper handling of exceptional conditions in Linux kernel mac80211
• Debian update for linux