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CVE-2026-98192

wifi: wcn36xx: Fix potential use-after-free in TX ack timer teardown

Products / packages Linux

Published

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Severity and exploitation

Not in CISA KEVNo CVSS score

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 21:30:34 UTC

Severity

unknown

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

In the Linux kernel, the following vulnerability has been resolved:

Source excerpt · Linux

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Linux · Linux

Linux

8 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

fdf21cc3714939dd4327f3d664fe5863d15ccb31 → before 915298dbb766d2311b0822ab6ef24780def0bd53

git versions

fdf21cc3714939dd4327f3d664fe5863d15ccb31 → before e7f265d507ee55017b67ef4722df884468be1113

git versions

fdf21cc3714939dd4327f3d664fe5863d15ccb31 → before 7ce1e55a439968a298a63d3199cb1c2636429746

git versions

fdf21cc3714939dd4327f3d664fe5863d15ccb31 → before 15e59e377facc87ce82228279d88efaa89fdbca5

git versions

fdf21cc3714939dd4327f3d664fe5863d15ccb31 → before 3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd

git versions

fdf21cc3714939dd4327f3d664fe5863d15ccb31 → before 2bddc5d088cf430ecd913020472f1def32a36a3d

git versions

fdf21cc3714939dd4327f3d664fe5863d15ccb31 → before c0df0878e9110909cf0bec6080d72d36401a0c89

git versions

fdf21cc3714939dd4327f3d664fe5863d15ccb31 → before d9be5e75530772fc31637070d51e5717d6aeaa2a

git versions

unaffected

unknown

Other versions: unaffected

Linux · Linux

Linux

10 ranges
Linux version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

5.10

unaffected

0 → before 5.10

semver versions

5.10.273 → through 5.10.*

semver versions

5.15.224 → through 5.15.*

semver versions

6.1.191 → through 6.1.*

semver versions

6.6.160 → through 6.6.*

semver versions

6.12.112 → through 6.12.*

semver versions

6.18.54 → through 6.18.*

semver versions

7.2.8 → through 7.2.*

semver versions

7.3 → through *

original_commit_for_fix versions

unknown

Other versions: affected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher 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.

References

8 sources
git.kernel.org/stable/c/915298dbb766d2311b0822ab6ef24780def0bd53
Source referenceLinux
git.kernel.org/stable/c/e7f265d507ee55017b67ef4722df884468be1113
Source referenceLinux
git.kernel.org/stable/c/7ce1e55a439968a298a63d3199cb1c2636429746
Source referenceLinux
git.kernel.org/stable/c/15e59e377facc87ce82228279d88efaa89fdbca5
Source referenceLinux
git.kernel.org/stable/c/3edabc965bcce49cbb2ec1c2b91f8a555a8ec8bd
Source referenceLinux
git.kernel.org/stable/c/2bddc5d088cf430ecd913020472f1def32a36a3d
Source referenceLinux
View 2 more references
git.kernel.org/stable/c/c0df0878e9110909cf0bec6080d72d36401a0c89
Source referenceLinux
git.kernel.org/stable/c/d9be5e75530772fc31637070d51e5717d6aeaa2a
Source referenceLinux

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification · not supplied
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-98192

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

Linux · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.10

Before: 5.10.273

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.10

Before: 5.15.224

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.10

Before: 6.1.191

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.10

Before: 6.6.160

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.10

Before: 6.12.112

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.10

Before: 6.18.54

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.10

Before: 7.2.8

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 5.10

Before: 7.3

Applicability preview
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  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "5.10",
            "versionEndExcluding": "5.10.273"
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          {
            "vulnerable": true,
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          {
            "vulnerable": true,
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            "versionStartIncluding": "5.10",
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          {
            "vulnerable": true,
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            "vulnerable": true,
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Contributing organizations · 1
Linux

Assigning organization

2026-10-30

Timeline

All times UTC

  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

Large field values are marked as truncated previews. Original source snapshots remain retained.