Threats Tagged 'cve-2026-19947'
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Threats Tagged 'cve-2026-19947'
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0 CVE-2026-19947 is a medium severity vulnerability in the Zephyr project affecting versions from 3.6.0 up to but not including 4.5.0. It involves the device multiplexer pseudo-driver (devmux) which exposes two system calls lacking proper kernel-object authorization checks when user mode is enabled. This allows an unprivileged user-mode thread to read and modify which downstream device the multiplexer forwards to, potentially redirecting or suppressing console, log, and shell output. The issue is limited to devices defined in the devicetree and does not allow out-of-bounds or arbitrary memory access. A fix has been implemented that properly registers devmux devices as kernel objects and adds authorization checks to the relevant system calls. Join the discussion | CVE Database V5 | 10/21/2026, 18:19:35 UTC Added: 10/21/2026, 18:31:45 UTC |
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