Linux Kernel Wi-Fi subsystem Use-After-Free Rated 7.8 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-46069

Key Details

CVE	CVE-2026-46069
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-15
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel and Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classified as	CWE-416 (Use After Free)
Exploitation prediction (EPSS)	0.14% probability of exploitation in the next 30 days (3% percentile) -- FIRST.org's EPSS model.

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Siemens

SIMATIC S7-1500 TM MFP - GNU/Linux subsystem

Subsystems	Controllers & Field I/O, OT Supporting Infrastructure
Sectors	All Sectors

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

wifi: mwifiex: fix use-after-free in mwifiex_adapter_cleanup()

The mwifiex_adapter_cleanup() function uses timer_delete()

(non-synchronous) for the wakeup_timer before the adapter structure is

freed. This is incorrect because timer_delete() does not wait for any

running timer callback to complete.

If the wakeup_timer callback (wakeup_timer_fn) is executing when

mwifiex_adapter_cleanup() is called, the callback will continue to

access adapter fields (adapter->hw_status, adapter->if_ops.card_reset,

etc.) which may be freed by mwifiex_free_adapter() called later in the

mwifiex_remove_card() path.

Use timer_delete_sync() instead to ensure any running timer callback has

completed before returning. (NVD)

Monitor Linux's and Siemens's web pages for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-46069
CVE	https://www.cve.org/CVERecord?id=CVE-2026-46069

Source

Reference

NVD

CVE