High 8.8Published Aug 10, 2026

CVE-2026-68198wifi: ath6kl: fix use-after-free in aggr_reset_state()

Updated under an hour ago (Oct 27, 2026, 3:40 PM ET)

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Exploited in the last 30 days

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.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from bdcd81707973cf8aa9305337166f8ee842a050d4 before a1bac650b2d6b1baab1f3e78e2e007a6e2948dde; from bdcd81707973cf8aa9305337166f8ee842a050d4 before 2132a6db05846dd2318857d00e0c1291f9e41b29; from bdcd81707973cf8aa9305337166f8ee842a050d4 before 17ff29cd8dbc977c97788a5f7c011ec807b58242; from bdcd81707973cf8aa9305337166f8ee842a050d4 before 64af6534a085f49d6ed33338a19ab9cf0d0523c9; from bdcd81707973cf8aa9305337166f8ee842a050d4 before b5d618fd61b9069b4c0a6b487022dd3117ad5acc; from bdcd81707973cf8aa9305337166f8ee842a050d4 before 18965470d41e69d3fc10eb62afae29d10f4cdfd1; from bdcd81707973cf8aa9305337166f8ee842a050d4 before a3313111b5d9046af60b370c93eec105b27380c1; from bdcd81707973cf8aa9305337166f8ee842a050d4 before ba7debb4dd6427386862220e8335a53a4bfc235d	CNA record

References

References

https://git.kernel.org/stable/c/a1bac650b2d6b1baab1f3e78e2e007a6e2948dde
https://git.kernel.org/stable/c/2132a6db05846dd2318857d00e0c1291f9e41b29
https://git.kernel.org/stable/c/17ff29cd8dbc977c97788a5f7c011ec807b58242
https://git.kernel.org/stable/c/64af6534a085f49d6ed33338a19ab9cf0d0523c9
https://git.kernel.org/stable/c/b5d618fd61b9069b4c0a6b487022dd3117ad5acc
https://git.kernel.org/stable/c/18965470d41e69d3fc10eb62afae29d10f4cdfd1
https://git.kernel.org/stable/c/a3313111b5d9046af60b370c93eec105b27380c1
https://git.kernel.org/stable/c/ba7debb4dd6427386862220e8335a53a4bfc235d

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.