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.
Metrics
Affected Vendors & Products
Advisories
| Source | ID | Title |
|---|---|---|
Debian DSA |
DSA-6524-1 | flatpak security update |
Fixes
Solution
No solution given by the vendor.
Workaround
Run Flatpak apps in a new session (setsid flatpak run ... or setsid() in the parent) or a new process group (setpgid (0, 0) in the parent), or avoid running untrusted Flatpak apps.
References
History
Tue, 29 Sep 2026 04:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Flatpak: flatpak: sandboxed app can signal unsandboxed processes in the same process group | |
| First Time appeared |
Redhat
Redhat enterprise Linux |
|
| Weaknesses | CWE-653 | |
| CPEs | cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
|
| Vendors & Products |
Redhat
Redhat enterprise Linux |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-09-29T03:43:16.941Z
Reserved: 2026-09-23T21:15:11.736Z
Link: CVE-2026-97029
No data.
Status : Received
Published: 2026-09-29T04:18:02.573
Modified: 2026-09-29T04:18:02.573
Link: CVE-2026-97029
No data.
OpenCVE Enrichment
No data.
Weaknesses
Debian DSA