CVE-2025-31133

CVE Enrichment

CVSS: 7.3 HIGH
EPSS: 1.25%
EPSS Percentile: 69.30%
CISA KEV: Not listed

Description

runc is a CLI tool for spawning and running containers according to the OCI specification. In versions 1.2.7 and below, 1.3.0-rc.1 through 1.3.1, 1.4.0-rc.1 and 1.4.0-rc.2 files, runc would not perform sufficient verification that the source of the bind-mount (i.e., the container's /dev/null) was actually a real /dev/null inode when using the container's /dev/null to mask. This exposes two methods of attack: an arbitrary mount gadget, leading to host information disclosure, host denial of service, container escape, or a bypassing of maskedPaths. This issue is fixed in versions 1.2.8, 1.3.3 and 1.4.0-rc.3.

Technical Details

CVSS Version: 4.0
CNA / NVD Source: [email protected]
Published: 07-Nov-2025 02:15
Last Modified: 08-Oct-2026 04:10
EPSS Date: 2026-11-01
CWE: CWE-61, CWE-363

CVSS Vector


            CVSS:4.0                            AV:L /
                            AC:L /
                            AT:P /
                            PR:L /
                            UI:A /
                            VC:H /
                            VI:H /
                            VA:H /
                            SC:H /
                            SI:H /
                            SA:H /
                            E:X /
                            CR:X /
                            IR:X /
                            AR:X /
                            MAV:X /
                            MAC:X /
                            MAT:X /
                            MPR:X /
                            MUI:X /
                            MVC:X /
                            MVI:X /
                            MVA:X /
                            MSC:X /
                            MSI:X /
                            MSA:X /
                            S:X /
                            AU:X /
                            R:X /
                            V:X /
                            RE:X /
                            U:X

Affected Products / Versions

linuxfoundation / runc Source: NVD CPE · affected
Version / affected range: * · before (exclusive) 1.2.8
cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*
linuxfoundation / runc Source: NVD CPE · affected
Version / affected range: * · from (inclusive) 1.3.0 · before (exclusive) 1.3.3
cpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*
linuxfoundation / runc Source: NVD CPE · affected
Version / affected range: 1.4.0
cpe:2.3:a:linuxfoundation:runc:1.4.0:rc1:*:*:*:*:*:*
linuxfoundation / runc Source: NVD CPE · affected
Version / affected range: 1.4.0
cpe:2.3:a:linuxfoundation:runc:1.4.0:rc2:*:*:*:*:*:*

References

Last enrichment sync: 02-Nov-2026 10:07
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (2)

[3] runC container-escape vulnerabilities (CVE-2025-31133, CVE-2025-52565, CVE-2025-52881), disclosed by a SUSE researcher on November 5, 2025. Darktrace 7.2 Adds Behavioral Runtime Security for Kubernetes
runC flaws such as CVE-2025-31133, CVE-2025-52565, and CVE-2025-52881 can bypass Docker protections. Research Highlights AI Agent Sandbox Escape Risks in Containers

CVE (5)

Threat Actors (2)

MITRE ATT&CK (2)

Vendors (4)

Products (8)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.