CVE-2026-58302

Name	CVE-2026-58302
Description	rtapi_app in linuxcnc-uspace in LinuxCNC before 2.9.9 allows privilege escalation. It is installed SUID root and loads shared library modules via dlopen() by using a user-supplied module name. Insufficient validation of the module name allows path traversal, enabling an unprivileged local user to load an arbitrary shared library. Because the process retains elevated privileges during module loading, this results in local privilege escalation to root.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1140943

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linuxcnc (PTS)	bookworm	2.9.0~pre1+git20230208.f1270d6ed7-1+deb12u1	vulnerable
	trixie	1:2.9.4-2	vulnerable
	sid	1:2.9.9-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
linuxcnc	source	(unstable)	1:2.9.9-1			1140943

Notes

[trixie] - linuxcnc <no-dsa> (Will be fixed via point release)
[bookworm] - linuxcnc <no-dsa> (Will be fixed via point release)
https://github.com/LinuxCNC/linuxcnc/commit/00d534c87464a3ed446656998aa02b8abc74b391 (v2.9.9)