CVE-2026-46187

Summary

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

wifi: rsi: fix kthread lifetime race between self-exit and external-stop

RSI driver use both self-exit(kthread_complete_and_exit) and external-stop (kthread_stop) when killing a kthread. Generally, kthread_stop() is called first, and in this case, no particular issues occur.

However, in rare instances where kthread_complete_and_exit() is called first and then kthread_stop() is called, a UAF occurs because the kthread object, which has already exited and been freed, is accessed again.

Therefore, to prevent this with minimal modification, you must remove kthread_stop() and change the code to wait until the self-exit operation is completed.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4c62764d0fc21a34ffc44eec1210038c3a2e4473 < 4ac3095da22fc50e51ec10c3b8323c21ab3e441aaffected
LinuxLinux4c62764d0fc21a34ffc44eec1210038c3a2e4473 < 9dfe8a4458a063c6433526bc59112a169eee1aa3affected
LinuxLinux4c62764d0fc21a34ffc44eec1210038c3a2e4473 < 4f697813162d5f9151726a6d2bee82bffe4b0256affected
LinuxLinux4c62764d0fc21a34ffc44eec1210038c3a2e4473 < 95fcb436586dc3c2983537d557ac05bbc6a027f3affected
LinuxLinux4c62764d0fc21a34ffc44eec1210038c3a2e4473 < 16d9f674c619838bdeae42abc0929c9c5477ea1faffected
LinuxLinux4c62764d0fc21a34ffc44eec1210038c3a2e4473 < 4f9a4ae8d2c198f01611ea376034c326ef43ab56affected
LinuxLinux4c62764d0fc21a34ffc44eec1210038c3a2e4473 < 4f4c9b13c485abd0a2d2c97f9db339d1dd8e147faffected
LinuxLinux4c62764d0fc21a34ffc44eec1210038c3a2e4473 < db57a1aa54ff68669781976e4edb045e09e2b65baffected
LinuxLinuxd8f70ad66032363e3edceee81a7be2aaccb2d7f5affected
LinuxLinuxec759c0015fb7d4f5c7cb5711d2c8905724c7983affected
LinuxLinuxc8ed05b1d8520f40395916438da9b38ce937a896affected
LinuxLinuxad78e2e057ab8d914a2b5e3e6acf29c3c8a428a3affected
LinuxLinuxde1fd69b6541ff61177114d63af7ea719c426cf0affected
LinuxLinux3.18.139 < 3.19affected
LinuxLinux4.4.179 < 4.5affected
LinuxLinux4.9.170 < 4.10affected
LinuxLinux4.14.113 < 4.15affected
LinuxLinux4.19.36 < 4.20affected
LinuxLinux4.20affected
LinuxLinux0 < 4.20unaffected
LinuxLinux5.10.258 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.175 <= 6.1.*unaffected
LinuxLinux6.6.140 <= 6.6.*unaffected
LinuxLinux6.12.88 <= 6.12.*unaffected
LinuxLinux6.18.30 <= 6.18.*unaffected
LinuxLinux7.0.7 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References