| Name | CVE-2023-1076 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3404-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| linux (PTS) | buster | 4.19.249-2 | vulnerable |
| buster (security) | 4.19.289-2 | vulnerable | |
| bullseye | 5.10.197-1 | fixed | |
| bullseye (security) | 5.10.191-1 | fixed | |
| bookworm | 6.1.55-1 | fixed | |
| bookworm (security) | 6.1.52-1 | fixed | |
| trixie | 6.5.10-1 | fixed | |
| sid | 6.5.13-1 | fixed | |
| linux-5.10 (PTS) | buster (security) | 5.10.197-1~deb10u1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| linux | source | bullseye | 5.10.178-1 | |||
| linux | source | (unstable) | 6.1.20-1 | |||
| linux-5.10 | source | buster | 5.10.178-3~deb10u1 | DLA-3404-1 |
https://git.kernel.org/linus/66b2c338adce580dfce2199591e65e2bab889cff
https://git.kernel.org/linus/a096ccca6e503a5c575717ff8a36ace27510ab0a
https://www.openwall.com/lists/oss-security/2023/03/01/5