CVE-2023-1076 | BDVDB-2026-198364 Detail

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.

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History#

1. Version 12023-03-27Record published in the CVE List.
2. Version 22025-02-24Most recent update recorded in the CVE List.