CVE-2026-46069

Summary

In the Linux kernel, the following vulnerability has been resolved:

wifi: mwifiex: fix use-after-free in mwifiex_adapter_cleanup()

The mwifiex_adapter_cleanup() function uses timer_delete() (non-synchronous) for the wakeup_timer before the adapter structure is freed. This is incorrect because timer_delete() does not wait for any running timer callback to complete.

If the wakeup_timer callback (wakeup_timer_fn) is executing when mwifiex_adapter_cleanup() is called, the callback will continue to access adapter fields (adapter->hw_status, adapter->if_ops.card_reset, etc.) which may be freed by mwifiex_free_adapter() called later in the mwifiex_remove_card() path.

Use timer_delete_sync() instead to ensure any running timer callback has completed before returning.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4636187da60b6e33526050235c610409d9cc00e8 < c3508895450cca4aeaf5dbadbb5e582363005264affected
LinuxLinux4636187da60b6e33526050235c610409d9cc00e8 < 1958a92599b2653d730ccb6f5685fc3fbed21812affected
LinuxLinux4636187da60b6e33526050235c610409d9cc00e8 < a88f5391dc68f78cae5eb6a8cd341cafee795d3daffected
LinuxLinux4636187da60b6e33526050235c610409d9cc00e8 < 11869ce402d95519d49b25a2a97741f68d69d103affected
LinuxLinux4636187da60b6e33526050235c610409d9cc00e8 < 63fe3389b3e092d6c0eeea9fc0318e7918b16618affected
LinuxLinux4636187da60b6e33526050235c610409d9cc00e8 < 4e179a60a60c0a5aea245e8e67768343c0f070b8affected
LinuxLinux4636187da60b6e33526050235c610409d9cc00e8 < 030abbae49cf9fd1fba7aa08e15ec81efbeb78cfaffected
LinuxLinux4636187da60b6e33526050235c610409d9cc00e8 < ae5e95d4157481693be2317e3ffcd84e36010cbbaffected
LinuxLinux4.0affected
LinuxLinux0 < 4.0unaffected
LinuxLinux5.10.259 <= 5.10.*unaffected
LinuxLinux5.15.210 <= 5.15.*unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.86 <= 6.12.*unaffected
LinuxLinux6.18.27 <= 6.18.*unaffected
LinuxLinux7.0.4 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References