CVE-2026-76925

Name	CVE-2026-76925
Description	A flaw was found in Flatpak. A Time-of-check to time-of-use (TOCTOU) race condition exists in the `org.freedesktop.Flatpak.SystemHelper` component. This vulnerability occurs because a privileged `chmod` operation executes before the OSTree repository validation within the `Deploy()` function. An attacker can exploit this timing window to redirect symlinks to arbitrary files, potentially leading to unauthorized file manipulation or information disclosure.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
flatpak (PTS)	bookworm, bookworm (security)	1.14.10-1~deb12u2	fixed
	trixie (security), trixie	1.16.6-1~deb13u2	fixed
	sid, forky	1.18.3-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
flatpak	source	(unstable)	(not affected)

- flatpak <not-affected> (CVE assigned for issue specific to Red Hat's Flatpak package)