CVE-2026-97029
MEDIUM
NVD
CVSS Score
5.7
Severity
MEDIUM
Published
Sep 29, 2026
Vendor
unknown
Description
Flatpak'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.