CVE-2026-10805

Name	CVE-2026-10805
Description	A flaw was found in NetworkManager. This local privilege escalation vulnerability exists in NetworkManager's dhclient backend when processing malformed Manufacturer Usage Description (MUD) URLs. A local user can exploit this flaw to escalate privileges by triggering a script via a crafted MUD URL, provided an administrator has explicitly configured NetworkManager to use dhclient. This issue does not affect default configurations of NetworkManager.
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	1139285

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
network-manager (PTS)	bullseye	1.30.6-1+deb11u1	vulnerable
	bookworm	1.42.4-1+deb12u1	vulnerable
	trixie	1.52.1-1	vulnerable
	forky	1.56.1-1	vulnerable
	sid	1.58.0-2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
network-manager	source	(unstable)	1.58.0-2			1139285

Notes

[trixie] - network-manager <ignored> (Minor issue)
[bookworm] - network-manager <ignored> (Minor issue)
[bullseye] - network-manager <ignored> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2484613
Network-manager defaults to the internal DHCP client
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/2426 (1.58-rc1)
https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/2427 (1.58-rc1)