{"id":"CVE-2026-97029","title":"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","summary":"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…","severity":"medium","cvss":5.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-653"],"vendor":"Red Hat","product":"flatpak","affected":["flatpak (all versions)","flatpak (all versions)","flatpak (all versions)","flatpak (all versions)"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T21:29:07.663","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97029","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-97029","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2542698","label":"secalert@redhat.com"},{"url":"https://github.com/flatpak/flatpak/security/advisories/GHSA-f3p8-vr7v-gxf2","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97029.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97029"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97029"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00245,"epssPercentile":0.15606,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-29T15:52:12.039215Z"},"ingestedAt":"2026-09-29T04:27:15.488Z","slug":"CVE-2026-97029","body":"## Overview\n\nFlatpak'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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-29 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97029.json)","depth":"sunlit","depthScore":31,"depthScoreParts":{"impact":31.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}