CVE-2026-98192wifi: wcn36xx: Fix potential use-after-free in TX ack timer teardown
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: wcn36xx: Fix potential use-after-free in TX ack timer teardown wcn36xx_dxe_deinit() tears down the TX ack timer with timer_delete(), which only dequeues the timer and does not wait for a callback that is already executing; the preceding free_irq() calls synchronize the interrupt handlers only. The callback, wcn36xx_dxe_tx_timer(), can therefore be running past the teardown and use the wcn freed along with the ieee80211_hw in wcn36xx_remove(): it takes wcn->dxe_lock, reads wcn->tx_ack_skb and passes wcn->hw to ieee80211_tx_status_irqsafe(). Fix this by using timer_shutdown_sync(), which waits for a running callback and also prevents the timer from being rearmed again. The timer is set up again by wcn36xx_dxe_init() on the next start, so the start/stop cycle is unaffected. This issue was found by an in-house static analysis tool.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 24 days later
· 24 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected fdf21cc3714939dd4327f3d664fe5863d15ccb31 – < 915298dbb766d2311b0822ab6ef24780def0bd53
- affected fdf21cc3714939dd4327f3d664fe5863d15ccb31 – < e7f265d507ee55017b67ef4722df884468be1113
- affected fdf21cc3714939dd4327f3d664fe5863d15ccb31 – < 7ce1e55a439968a298a63d3199cb1c2636429746
- affected fdf21cc3714939dd4327f3d664fe5863d15ccb31 – < 15e59e377facc87ce82228279d88efaa89fdbca5
- affected fdf21cc3714939dd4327f3d664fe5863d15ccb31 – < 3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd
- affected fdf21cc3714939dd4327f3d664fe5863d15ccb31 – < 2bddc5d088cf430ecd913020472f1def32a36a3d
- affected fdf21cc3714939dd4327f3d664fe5863d15ccb31 – < c0df0878e9110909cf0bec6080d72d36401a0c89
- affected fdf21cc3714939dd4327f3d664fe5863d15ccb31 – < d9be5e75530772fc31637070d51e5717d6aeaa2a
- affected 5.10
- unaffected < 5.10
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.112 – ≤ 6.12.*
- unaffected 6.18.54 – ≤ 6.18.*
- unaffected 7.2.8 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/915298dbb766d2311b0822ab6ef24780def0bd53 (opens in a new tab)
- https://git.kernel.org/stable/c/e7f265d507ee55017b67ef4722df884468be1113 (opens in a new tab)
- https://git.kernel.org/stable/c/7ce1e55a439968a298a63d3199cb1c2636429746 (opens in a new tab)
- https://git.kernel.org/stable/c/15e59e377facc87ce82228279d88efaa89fdbca5 (opens in a new tab)
- https://git.kernel.org/stable/c/3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd (opens in a new tab)
- https://git.kernel.org/stable/c/2bddc5d088cf430ecd913020472f1def32a36a3d (opens in a new tab)
- https://git.kernel.org/stable/c/c0df0878e9110909cf0bec6080d72d36401a0c89 (opens in a new tab)
- https://git.kernel.org/stable/c/d9be5e75530772fc31637070d51e5717d6aeaa2a (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-93120 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-98192)Record last updated .