{"id":"CVE-2026-98192","state":"PUBLISHED","title":"wifi: wcn36xx: Fix potential use-after-free in TX ack timer teardown","description":"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->dxe_lock,\nreads wcn->tx_ack_skb and passes wcn->hw 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.","publishedAt":"2026-10-06T08:44:32.912Z","updatedAt":"2026-10-30T12:37:53.227Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"915298dbb766d2311b0822ab6ef24780def0bd53","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"e7f265d507ee55017b67ef4722df884468be1113","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"7ce1e55a439968a298a63d3199cb1c2636429746","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"15e59e377facc87ce82228279d88efaa89fdbca5","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"2bddc5d088cf430ecd913020472f1def32a36a3d","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"c0df0878e9110909cf0bec6080d72d36401a0c89","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"d9be5e75530772fc31637070d51e5717d6aeaa2a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/wcn36xx/dxe.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/wcn36xx/dxe.c"]}],"references":["https://git.kernel.org/stable/c/915298dbb766d2311b0822ab6ef24780def0bd53","https://git.kernel.org/stable/c/e7f265d507ee55017b67ef4722df884468be1113","https://git.kernel.org/stable/c/7ce1e55a439968a298a63d3199cb1c2636429746","https://git.kernel.org/stable/c/15e59e377facc87ce82228279d88efaa89fdbca5","https://git.kernel.org/stable/c/3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd","https://git.kernel.org/stable/c/2bddc5d088cf430ecd913020472f1def32a36a3d","https://git.kernel.org/stable/c/c0df0878e9110909cf0bec6080d72d36401a0c89","https://git.kernel.org/stable/c/d9be5e75530772fc31637070d51e5717d6aeaa2a"],"weaknesses":[],"ingestedAt":"2026-10-30T12:56:04.490Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98192.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98192","state":"PUBLISHED","datePublished":"2026-10-06T08:44:32.912Z","dateUpdated":"2026-10-30T12:37:53.227Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.323Z"},"containers":{"cna":{"title":"wifi: wcn36xx: Fix potential use-after-free in TX ack timer teardown","descriptions":[{"lang":"en","value":"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->dxe_lock,\nreads wcn->tx_ack_skb and passes wcn->hw 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"915298dbb766d2311b0822ab6ef24780def0bd53","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"e7f265d507ee55017b67ef4722df884468be1113","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"7ce1e55a439968a298a63d3199cb1c2636429746","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"15e59e377facc87ce82228279d88efaa89fdbca5","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"2bddc5d088cf430ecd913020472f1def32a36a3d","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"c0df0878e9110909cf0bec6080d72d36401a0c89","versionType":"git"},{"version":"fdf21cc3714939dd4327f3d664fe5863d15ccb31","status":"affected","lessThan":"d9be5e75530772fc31637070d51e5717d6aeaa2a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/wcn36xx/dxe.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/wireless/ath/wcn36xx/dxe.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/915298dbb766d2311b0822ab6ef24780def0bd53"},{"url":"https://git.kernel.org/stable/c/e7f265d507ee55017b67ef4722df884468be1113"},{"url":"https://git.kernel.org/stable/c/7ce1e55a439968a298a63d3199cb1c2636429746"},{"url":"https://git.kernel.org/stable/c/15e59e377facc87ce82228279d88efaa89fdbca5"},{"url":"https://git.kernel.org/stable/c/3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd"},{"url":"https://git.kernel.org/stable/c/2bddc5d088cf430ecd913020472f1def32a36a3d"},{"url":"https://git.kernel.org/stable/c/c0df0878e9110909cf0bec6080d72d36401a0c89"},{"url":"https://git.kernel.org/stable/c/d9be5e75530772fc31637070d51e5717d6aeaa2a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:37:53.227Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}