{"id":"CVE-2026-98192","summary":"wifi: wcn36xx: Fix potential use-after-free in TX ack timer teardown","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wcn36xx: Fix potential use-after-free in TX ack timer teardown\n\nwcn36xx_dxe_deinit() tears down the TX ack timer with timer_delete(),\nwhich only dequeues the timer and does not wait for a callback that is\nalready executing; the preceding free_irq() calls synchronize the\ninterrupt handlers only. The callback, wcn36xx_dxe_tx_timer(), can\ntherefore be running past the teardown and use the wcn freed along\nwith the ieee80211_hw in wcn36xx_remove(): it takes wcn-\u003edxe_lock,\nreads wcn-\u003etx_ack_skb and passes wcn-\u003ehw to\nieee80211_tx_status_irqsafe().\n\nFix this by using timer_shutdown_sync(), which waits for a running\ncallback and also prevents the timer from being rearmed again. The\ntimer is set up again by wcn36xx_dxe_init() on the next start, so the\nstart/stop cycle is unaffected.\n\nThis issue was found by an in-house static analysis tool.","modified":"2026-10-07T02:47:29.556267542Z","published":"2026-10-06T08:44:32.912Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98192.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2bddc5d088cf430ecd913020472f1def32a36a3d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c0df0878e9110909cf0bec6080d72d36401a0c89"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d9be5e75530772fc31637070d51e5717d6aeaa2a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98192.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98192"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"fdf21cc3714939dd4327f3d664fe5863d15ccb31"},{"fixed":"3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd"},{"fixed":"2bddc5d088cf430ecd913020472f1def32a36a3d"},{"fixed":"c0df0878e9110909cf0bec6080d72d36401a0c89"},{"fixed":"d9be5e75530772fc31637070d51e5717d6aeaa2a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98192.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.10.0"},{"fixed":"6.12.112"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.54"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98192.json"}}],"schema_version":"1.9.0"}