CVE-2026-68198

Summary

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

wifi: ath6kl: fix use-after-free in aggr_reset_state()

The aggr_reset_state() function uses timer_delete() (non-synchronous) for the aggregation timer before proceeding to delete TID state and before the structure is freed by callers like aggr_module_destroy().

If the timer callback (aggr_timeout) is executing when aggr_reset_state() is called, the callback will continue to access aggr_conn fields like rx_tid[] and stat[] which may be freed immediately after by kfree(aggr_info->aggr_conn) in aggr_module_destroy().

Additionally, the timer callback can re-arm itself via mod_timer() while aggr_reset_state() is running, creating a more complex race condition.

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

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxbdcd81707973cf8aa9305337166f8ee842a050d4 < 64af6534a085f49d6ed33338a19ab9cf0d0523c9affected
LinuxLinuxbdcd81707973cf8aa9305337166f8ee842a050d4 < b5d618fd61b9069b4c0a6b487022dd3117ad5accaffected
LinuxLinuxbdcd81707973cf8aa9305337166f8ee842a050d4 < 18965470d41e69d3fc10eb62afae29d10f4cdfd1affected
LinuxLinuxbdcd81707973cf8aa9305337166f8ee842a050d4 < a3313111b5d9046af60b370c93eec105b27380c1affected
LinuxLinuxbdcd81707973cf8aa9305337166f8ee842a050d4 < ba7debb4dd6427386862220e8335a53a4bfc235daffected
LinuxLinux3.2affected
LinuxLinux0 < 3.2unaffected
LinuxLinux6.6.151 <= 6.6.*unaffected
LinuxLinux6.12.103 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc5 <= *unaffected

Weaknesses

References