CVE-2025-52881

CVE Enrichment

CVSS: 7.3 HIGH
EPSS: 0.80%
EPSS Percentile: 56.64%
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, 1.3.2 and 1.4.0-rc.2, an attacker can trick runc into misdirecting writes to /proc to other procfs files through the use of a racing container with shared mounts (we have also verified this attack is possible to exploit using a standard Dockerfile with docker buildx build as that also permits triggering parallel execution of containers with custom shared mounts configured). This redirect could be through symbolic links in a tmpfs or theoretically other methods such as regular bind-mounts. While similar, the mitigation applied for the related CVE, CVE-2019-19921, was fairly limited and effectively only caused runc to verify that when LSM labels are written they are actually procfs files. 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 04:15
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 10:13
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.