Linux Kernel Wi-Fi subsystem Improper Validation Of Array Index Rated 7.8 CVSS

Last refreshed2026-10-15

Status: UPDATED | Advisory ID: CVE-2026-46163

Key Details

CVE	CVE-2026-46163
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-129 (Improper Validation of Array Index)
Exploitation prediction (EPSS)	0.18% probability of exploitation in the next 30 days (7% 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: b43legacy: enforce bounds check on firmware key index in RX path

Same fix as b43: the firmware-controlled key index in b43legacy_rx()

can exceed dev->max_nr_keys. The existing B43legacy_WARN_ON is

non-enforcing in production builds, allowing an out-of-bounds read of

dev->key[].

Make the check enforcing by dropping the frame for invalid indices. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-46163
CVE	https://www.cve.org/CVERecord?id=CVE-2026-46163

Source

Reference

NVD

CVE