CVE-2026-97029

NameCVE-2026-97029
DescriptionFlatpak's process ID namespace separation does not prevent a sandboxed app's kill(0, signal) or killpg(0, signal) calls from reaching processes outside the sandbox that share the same process group. A malicious or compromised Flatpak app can use this to cause denial of service by terminating processes outside its sandbox, such as the desktop shell.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-6524-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
flatpak (PTS)bookworm, bookworm (security)1.14.10-1~deb12u2vulnerable
trixie1.16.6-1~deb13u2vulnerable
trixie (security)1.16.6-1~deb13u3fixed
forky, sid1.18.4-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
flatpaksourcetrixie1.16.6-1~deb13u3DSA-6524-1
flatpaksource(unstable)1.18.4-1

Notes

https://github.com/flatpak/flatpak/security/advisories/GHSA-f3p8-vr7v-gxf2
Search for package or bug name: Reporting problems