CVE-2026-19947: zephyr 3.6.0 to before 4.5.0

CVE-2026-19947. CVSS 3.1 base score 5.3 (MEDIUM, Vendor/CNA).

Affected technology

zephyr · 3.6.0 to before 4.5.0
zephyrproject

Component: Not specified by the source
Function: z_vrfy_devmux_select_get, z_vrfy_devmux_select_set
File: drivers/misc/devmux/devmux.c, include/zephyr/drivers/misc/devmux/devmux.h

Attack conditions (Vendor/CNA, CVSS 3.1): Local · Low privileges required · No user interaction required

What an attacker can do

An attacker can suppress console, log and shell output, redirect that output to a downstream device it is able to observe, or flip the selection underneath another thread that is legitimately using the multiplexer. Vendor/CNA’s CVSS 3.1 assessment (base score 5.3/10) rates confidentiality, integrity and availability impact as low.

Published 22-Oct-2026 01:10 UTC

CWE: CWE-862
CCR priority: 21.2 /100 (P4)
CVSS 3.1: 5.3 /10 · CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L · Vendor/CNA
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-22 01:08:24.561609+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-19947.html