Red Hat Security Advisory: runc security update
The runC tool is a lightweight, portable implementation of the Open Container Format (OCF) that provides container runtime. Security Fix(es): * runc: container escape via 'masked path' abuse due to mount race conditions (CVE-2025-31133) * runc: container escape with malicious config due to /dev/console mount and related races (CVE-2025-52565) * runc: container escape and denial of service due to arbitrary write gadgets and procfs write redirects (CVE-2025-52881) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
The runC tool, a lightweight container runtime implementation, contains several security flaws that allow container escape and denial of service. Specifically, CVE-2025-31133 involves container escape via 'masked path' abuse due to mount race conditions. CVE-2025-52565 allows container escape through malicious configuration exploiting /dev/console mount and related race conditions. CVE-2025-52881 enables container escape and denial of service via arbitrary write gadgets and procfs write redirects. These vulnerabilities affect Red Hat Enterprise Linux 9 and Red Hat OpenShift Container Platform 4.18. Red Hat has issued security advisories and updated packages to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker to escape from a container to the host system, potentially gaining elevated privileges or causing denial of service. This undermines container isolation and could lead to unauthorized access or disruption of services running on affected Red Hat Enterprise Linux and OpenShift platforms.
Mitigation Recommendations
Red Hat has released updated packages for runC that address these vulnerabilities. Users should apply the security updates provided in Red Hat Enterprise Linux 9 and OpenShift Container Platform 4.18 as detailed in the Red Hat advisories RHSA-2025:19927 and RHSA-2026:0331. Instructions for updating OpenShift clusters are available in Red Hat's official documentation. No additional mitigations are indicated beyond applying the official patches.
Red Hat Security Advisory: runc security update
Description
The runC tool is a lightweight, portable implementation of the Open Container Format (OCF) that provides container runtime. Security Fix(es): * runc: container escape via 'masked path' abuse due to mount race conditions (CVE-2025-31133) * runc: container escape with malicious config due to /dev/console mount and related races (CVE-2025-52565) * runc: container escape and denial of service due to arbitrary write gadgets and procfs write redirects (CVE-2025-52881) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The runC tool, a lightweight container runtime implementation, contains several security flaws that allow container escape and denial of service. Specifically, CVE-2025-31133 involves container escape via 'masked path' abuse due to mount race conditions. CVE-2025-52565 allows container escape through malicious configuration exploiting /dev/console mount and related race conditions. CVE-2025-52881 enables container escape and denial of service via arbitrary write gadgets and procfs write redirects. These vulnerabilities affect Red Hat Enterprise Linux 9 and Red Hat OpenShift Container Platform 4.18. Red Hat has issued security advisories and updated packages to remediate these issues.
Potential Impact
Successful exploitation of these vulnerabilities could allow an attacker to escape from a container to the host system, potentially gaining elevated privileges or causing denial of service. This undermines container isolation and could lead to unauthorized access or disruption of services running on affected Red Hat Enterprise Linux and OpenShift platforms.
Mitigation Recommendations
Red Hat has released updated packages for runC that address these vulnerabilities. Users should apply the security updates provided in Red Hat Enterprise Linux 9 and OpenShift Container Platform 4.18 as detailed in the Red Hat advisories RHSA-2025:19927 and RHSA-2026:0331. Instructions for updating OpenShift clusters are available in Red Hat's official documentation. No additional mitigations are indicated beyond applying the official patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:19927
- Cve Count
- 3
- Additional Cves
- ["CVE-2025-52565","CVE-2025-52881"]
Threat ID: 6a160975e29bf47b5063f78f
Added to database: 05/26/2026, 20:58:29 UTC
Last enriched: 08/14/2026, 22:25:53 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 122
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