CVE-2026-97029
Flatpak: flatpak: sandboxed app can signal unsandboxed processes in the same process group
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.
INFO
Published Date :
Sept. 29, 2026, 4:18 a.m.
Last Modified :
Sept. 29, 2026, 4:18 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-97029
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 53f830b8-0a3f-465b-8143-3b8a9948e749 | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update Flatpak to the latest version.
- Ensure process ID namespace separation is enforced.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-97029.
| URL | Resource |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-97029 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2542698 | |
| https://github.com/flatpak/flatpak/security/advisories/GHSA-f3p8-vr7v-gxf2 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-97029 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-97029
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-97029 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-97029 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Sep. 29, 2026
Action Type Old Value New Value 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H Added CWE CWE-653 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/97xxx/CVE-2026-97029.json">CVE-2026-97029</a> Added Reference https://access.redhat.com/security/cve/CVE-2026-97029 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2542698 Added Reference https://github.com/flatpak/flatpak/security/advisories/GHSA-f3p8-vr7v-gxf2