wifi: wcn36xx: Fix potential use-after-free in TX ack timer teardown
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.
CVE-2026-98192
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98192
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "fdf21cc3714939dd4327f3d664fe5863d15ccb31",
"lessThan": "15e59e377facc87ce82228279d88efaa89fdbca5",
"versionType": "git"
},
{
"status": "affected",
"version": "fdf21cc3714939dd4327f3d664fe5863d15ccb31",
"lessThan": "3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd",
"versionType": "git"
},
{
"status": "affected",
"version": "fdf21cc3714939dd4327f3d664fe5863d15ccb31",
"lessThan": "2bddc5d088cf430ecd913020472f1def32a36a3d",
"versionType": "git"
},
{
"status": "affected",
"version": "fdf21cc3714939dd4327f3d664fe5863d15ccb31",
"lessThan": "c0df0878e9110909cf0bec6080d72d36401a0c89",
"versionType": "git"
},
{
"status": "affected",
"version": "fdf21cc3714939dd4327f3d664fe5863d15ccb31",
"lessThan": "d9be5e75530772fc31637070d51e5717d6aeaa2a",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/wireless/ath/wcn36xx/dxe.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/wireless/ath/wcn36xx/dxe.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98192
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48869 · Revision 1
- Added to Heist Feed
- Publisher date