# RHSA-2025:20957: runc security update

RHSA-2025:20957, released November 11, 2025, fixes 3 CVEs in runc (version 4:1.3.0-4.el9_7). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2025-20957
- Platform: Linux
- Released: Nov 11, 2025
- Priority: High (Closes CVE-2025-31133, high severity)
- CVEs: 3, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2025:20957

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [runc](https://patchblox.com/security/data/product/linux/runc.md) | RHEL 9 | 4:1.3.0-4.el9_7 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-31133](https://patchblox.com/security/data/cve/CVE-2025-31133.md) | High | runc container escape via "masked path" abuse due to mount race conditions | 8.2 | 0.0125 |  |
| [CVE-2025-52565](https://patchblox.com/security/data/cve/CVE-2025-52565.md) | High | container escape due to /dev/console mount and related races | 8.2 | 0.0081 |  |
| [CVE-2025-52881](https://patchblox.com/security/data/cve/CVE-2025-52881.md) | High | runc: LSM labels can be bypassed with malicious config using dummy procfs files | 8.2 | 0.0080 |  |

---

Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.