Bug 2404705 (CVE-2025-31133)
| Summary: | CVE-2025-31133 runc: container escape via 'masked path' abuse due to mount race conditions | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security DevOps Team <prodsec-dev> |
| Status: | NEW --- | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | security-response-team |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in runc. This flaw exploits an issue with how masked paths are implementedin runc. When masking files, runc will bind-mount the container's /dev/null inode on top of the file. However, if an attacker can replace /dev/null with a symlink to some other procfs file, runc will instead bind-mount the symlink target read-write.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2412995, 2412996 | ||
| Bug Blocks: | |||
| Deadline: | 2025-11-05 | ||
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Description
OSIDB Bzimport
2025-10-17 14:42:43 UTC
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2025:19927 https://access.redhat.com/errata/RHSA-2025:19927 This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2025:20957 https://access.redhat.com/errata/RHSA-2025:20957 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2025:21232 https://access.redhat.com/errata/RHSA-2025:21232 |