CVE-2026-98891: wifi: mac80211: validate deauth frame length before reason access
Published Oct 23, 2026
·Updated
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: validate deauth frame length before reason access
ieee80211rxmgmtdeauth() reads the deauth reason code before checking that the fixed field is actually present in the received frame.
Validate the deauth frame length first and only then read the reason code.
Affected Software
1 affected component
Linux Linux kernel
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Compensating control
In ieee80211_rx_mgmt_deauth(), validate that the deauthentication frame contains the fixed field before reading the deauth reason code.
Event History
Oct 23, 2026
CVE Published
via MITRE·11:37 AM
Data Sourced
via MITRE·11:37 AM
Description