{"id":"CVE-2026-68198","summary":"wifi: ath6kl: fix use-after-free in aggr_reset_state()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath6kl: fix use-after-free in aggr_reset_state()\n\nThe aggr_reset_state() function uses timer_delete() (non-synchronous)\nfor the aggregation timer before proceeding to delete TID state and\nbefore the structure is freed by callers like aggr_module_destroy().\n\nIf the timer callback (aggr_timeout) is executing when aggr_reset_state()\nis called, the callback will continue to access aggr_conn fields like\nrx_tid[] and stat[] which may be freed immediately after by\nkfree(aggr_info-\u003eaggr_conn) in aggr_module_destroy().\n\nAdditionally, the timer callback can re-arm itself via mod_timer() while\naggr_reset_state() is running, creating a more complex race condition.\n\nUse timer_delete_sync() instead to ensure any running timer callback\nhas completed before returning.","modified":"2026-08-25T03:30:37.530922263Z","published":"2026-08-10T12:00:16.718Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68198.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/17ff29cd8dbc977c97788a5f7c011ec807b58242"},{"type":"WEB","url":"https://git.kernel.org/stable/c/18965470d41e69d3fc10eb62afae29d10f4cdfd1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2132a6db05846dd2318857d00e0c1291f9e41b29"},{"type":"WEB","url":"https://git.kernel.org/stable/c/64af6534a085f49d6ed33338a19ab9cf0d0523c9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a1bac650b2d6b1baab1f3e78e2e007a6e2948dde"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a3313111b5d9046af60b370c93eec105b27380c1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b5d618fd61b9069b4c0a6b487022dd3117ad5acc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ba7debb4dd6427386862220e8335a53a4bfc235d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68198.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68198"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"bdcd81707973cf8aa9305337166f8ee842a050d4"},{"fixed":"a1bac650b2d6b1baab1f3e78e2e007a6e2948dde"},{"fixed":"2132a6db05846dd2318857d00e0c1291f9e41b29"},{"fixed":"17ff29cd8dbc977c97788a5f7c011ec807b58242"},{"fixed":"64af6534a085f49d6ed33338a19ab9cf0d0523c9"},{"fixed":"b5d618fd61b9069b4c0a6b487022dd3117ad5acc"},{"fixed":"18965470d41e69d3fc10eb62afae29d10f4cdfd1"},{"fixed":"a3313111b5d9046af60b370c93eec105b27380c1"},{"fixed":"ba7debb4dd6427386862220e8335a53a4bfc235d"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68198.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.2.0"},{"fixed":"5.10.266"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.217"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.184"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.151"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.103"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68198.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}