CVE-2026-97029Hinoki check available

Host-process termination via shared process-group signals

Published Sep 29, 2026 · Updated Sep 29, 2026

Flatpak sandbox isolation in Red Hat Enterprise Linux 7, 8, 9, and 10 allows local users to stop host processes with process-group signals. The PID namespace does not confine kill(0, signal) or killpg(0, signal), so a sandboxed app can signal unsandboxed processes that share its process group. Exploitation requires a malicious or compromised Flatpak app running in the same process group as a host process; terminating a desktop shell disrupts the user's session.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Oct 18, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Flatpak sandbox isolation in Red Hat Enterprise Linux 7, 8, 9, and 10 allows local users to stop host processes with process-group signals. The PID namespace does not confine kill(0, signal) or killpg(0, signal), so a sandboxed app can signal unsandboxed processes that share its process group. Exploitation requires a malicious or compromised Flatpak app running in the same process group as a host process; terminating a desktop shell disrupts the user's session.

The record

CVE
CVE-2026-97029
Published
Sep 29, 2026
Updated
Sep 29, 2026
Vendor
Commonhaus Foundation
Product
Red Hat Enterprise Linux 10
Classifications
T1489
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 29, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Commonhaus Foundation · Red Hat Enterprise Linux 10Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat Enterprise Linux 8Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat Enterprise Linux 7Affected versions are unavailable in this record.
Commonhaus Foundation · Red Hat Enterprise Linux 9Affected versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1489Service Stop

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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