CVE-2025-31133

HIGH EPSS 47.5%
Published Nov 6, 20257mo ago · Modified Jun 17, 20262w ago
7.3 CVSS 4.0
High
Find Similar
Published Nov 6, 2025 7mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.3
Exploitability
—
Impact
—
Vector string
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
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction A
Scope X

Threat Intelligence

EPSS Exploit Probability
47.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 2

CWE-363
CWE-61

Affected Products 4

VendorProductVersionRange
linuxfoundationrunc* <1.2.8
linuxfoundationrunc*≥1.3.0  –  <1.3.3
linuxfoundationrunc1.4.0any
linuxfoundationrunc1.4.0any

References 5

  • github.com https://github.com/opencontainers/runc/commit/1a30a8f3d921acbbb6a4bb7e99da2c05f8d48522
    Patch
  • github.com https://github.com/opencontainers/runc/commit/5d7b2424072449872d1cd0c937f2ca25f418eb66
    Patch
  • github.com https://github.com/opencontainers/runc/commit/8476df83b534a2522b878c0507b3491def48db9f
    Patch
  • github.com https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64
    Patch
  • github.com https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2
    MitigationPatchThird Party Advisory

Remediation

  • github.com https://github.com/opencontainers/runc/commit/1a30a8f3d921acbbb6a4bb7e99da2c05f8d48522
    Patch
  • github.com https://github.com/opencontainers/runc/commit/5d7b2424072449872d1cd0c937f2ca25f418eb66
    Patch
  • github.com https://github.com/opencontainers/runc/commit/8476df83b534a2522b878c0507b3491def48db9f
    Patch
  • github.com https://github.com/opencontainers/runc/commit/db19bbed5348847da433faa9d69e9f90192bfa64
    Patch
  • github.com https://github.com/opencontainers/runc/security/advisories/GHSA-9493-h29p-rfm2
    MitigationPatchThird Party Advisory