CVE-2026-16730

Name	CVE-2026-16730
Description	A flaw was found in dbus-broker. When the process file-descriptor limit is reached, EMFILE/ENFILE errors during peer setup (notably SO_PEERPIDFD) are handled as fatal failures, causing the broker to exit. A local attacker who can open many connections to the user session bus can trigger this and deny service to the desktop session. Flatpak applications can reach the host session bus through the dbus proxy.
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	1142850

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
dbus-broker (PTS)	bullseye	26-1+deb11u2	vulnerable
	bookworm	33-1	vulnerable
	trixie	37-2	vulnerable
	forky, sid	37-5	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
dbus-broker	source	(unstable)	(unfixed)			1142850

Notes

[trixie] - dbus-broker <no-dsa> (Minor issue)
https://github.com/bus1/dbus-broker/issues/435
https://github.com/bus1/dbus-broker/commit/c4a3c886366f7bd566ec9a55b3855ade8290fa17
https://github.com/bus1/dbus-broker/commit/aaa9fd6bbc2d5d7bfeca039f9c457b7f88a50dde