CVE-2023-1076

MediumCVSS 5.5/10Last modified Jun 17, 2026

Description

A flaw was found in the Linux Kernel. The tun/tap sockets have their socket UID hardcoded to 0 due to a type confusion in their initialization function. While it will be often correct, as tuntap devices require CAP_NET_ADMIN, it may not always be the case, e.g., a non-root user only having that capability. This would make tun/tap sockets being incorrectly treated in filtering/routing decisions, possibly bypassing network filters.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-791 CWE-843

Affected software

No affected versions have been published.

Timeline

Published: Mar 27, 2023
Last modified: Jun 17, 2026
NVD status: Modified

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