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CVE-2026-98192— wifi: wcn36xx: Fix potential use-after-free in TX ack timer teardown

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，已修复以下漏洞： wifi: wcn36xx：修复 TX 确认定时器拆除过程中的潜在释放后使用（use-after-free）问题 函数通过调用 来拆除 TX 确认定时器，但该函数仅将定时器从队列中移除，并不会等待已执行的回调函数结束；而之前的 调用仅同步了中断处理程序。因此，回调函数 可能在拆除过程结束后仍继续执行，从而使用已在 中与 一起释放的 结构体。该回调函数会获取 ，读取 ，并将 传递给 。 通过改用 修复此问题，该函数会等待正在运行的回调函数结束，并防止定时器被重新调度。在下次启

AI Predicted 4.9 Difficulty: Moderate EPSS 0.18% · P6

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux fdf21cc3714939dd4327f3d664fe5863d15ccb31< 3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd affected
fdf21cc3714939dd4327f3d664fe5863d15ccb31< 2bddc5d088cf430ecd913020472f1def32a36a3d affected
fdf21cc3714939dd4327f3d664fe5863d15ccb31< c0df0878e9110909cf0bec6080d72d36401a0c89 affected
fdf21cc3714939dd4327f3d664fe5863d15ccb31< d9be5e75530772fc31637070d51e5717d6aeaa2a affected
5.10 affected
< 5.10 unaffected
6.12.112≤ 6.12.* unaffected
6.18.54≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-98192

Vulnerability Information
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Vulnerability Title
wifi: wcn36xx: Fix potential use-after-free in TX ack timer teardown
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux fdf21cc3714939dd4327f3d664fe5863d15ccb31 ~ 3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd -
Linux Linux 5.10 -

II. Public POCs for CVE-2026-98192

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III. Intelligence Information for CVE-2026-98192

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Patches & Fixes for CVE-2026-98192 (4)

Same Patch Batch · Linux · 2026-10-06 · 208 CVEs total

CVE-2026-98323 9.8 CRITICAL RDMA/siw: Bound fragmented header copies by the remaining length
CVE-2026-98365 9.8 CRITICAL RDMA/rxe: Fix integer overflow in mr_check_range() leading to OOB access
CVE-2026-98282 8.8 HIGH powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba
CVE-2026-98283 8.8 HIGH KVM: PPC: Book3S HV: fix use-after-free in kvmhv_emulate_tlbie_all_lpid()
CVE-2026-98339 8.8 HIGH wifi: cfg80211: don't filter by BSS type when removing stale entries
CVE-2026-98171 8.8 HIGH smb: client: fix next_buffer UAF and NextCommand bounds in compound PDUs
CVE-2026-98261 8.1 HIGH cifs: Fix server use-after-free in cifs_chan_skip_or_disable()
CVE-2026-98357 8.1 HIGH IB/isert: wait for deferred control PDU completions before releasing the connection
CVE-2026-98239 8.1 HIGH net: lan743x: fix RX checksum use-after-free
CVE-2026-98341 7.8 HIGH wifi: cfg80211: don't free driver-owned scan requests
CVE-2026-98324 7.8 HIGH dmaengine: pxa: fix double counting of the hw descriptors
CVE-2026-98228 7.8 HIGH mips: select CONFIG_WEAK_REORDERING_BEYOND_LLSC from CONFIG_EYEQ
CVE-2026-98229 7.8 HIGH xfrm: save input state data before secpath resets
CVE-2026-98320 7.8 HIGH netfilter: flowtable: hold reference on ct until flow is released
CVE-2026-98318 7.8 HIGH smb: client: validate absolute native symlink targets before NT fixups
CVE-2026-98315 7.8 HIGH ntfs: protect runlist updates with the runlist lock
CVE-2026-98260 7.8 HIGH exec: Cleanup POSIX timers right after de_thread()
CVE-2026-98256 7.8 HIGH signal: Prevent exec() race
CVE-2026-98258 7.8 HIGH posix-cpu-timers: Prevent freeing a timer which is queued on the expiry list
CVE-2026-98254 7.8 HIGH swiotlb: use the adjusted address for the highmem page lookup

Showing top 20 of 208 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-98192

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