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Vulnerabilities

Vulnerability · CVE-2025-52881

runc is a CLI tool for spawning and running containers according to the OCI specification.

Published Nov 6, 2025 · catalog updated Nov 6, 2025 · runc is a CLI

Last checked Oct 31, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-52881. EPSS is 0.80%. Act only if a listed version of runc is a CLI is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (runc is a CLI).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.80%
Remediation
Version ranges on file
Affected products
vendor opencontainers runc ≤ 1.4.0-rc.2, < 1.4.0-rc.3

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-moun

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor opencontainers runc ≤ 1.4.0-rc.2, < 1.4.0-rc.3≤ 1.4.0-rc.2, < 1.4.0-rc.3

How to fix CVE-2025-52881

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-52881. EPSS is 0.80%. Act only if a listed version of runc is a CLI is installed.

Which versions are affected?

Compare what you have installed with opencontainers runc ≤ 1.4.0-rc.2, < 1.4.0-rc.3 ≤ 1.4.0-rc.2, < 1.4.0-rc.3. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.80%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 6, 2025 · EUVD

    Detected

    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 perm

  2. Nov 6, 2025 · EUVD

    Updated

    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 perm

Sources

  • CVE.orgVulnerability recordCVE-2025-52881

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-52881

    30-day exploitation probability 0.80%

    first.org
  • EUVDVulnerability recordEUVD-2025-37940

    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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 31, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 31, 2026
  • CVE.orgOct 25, 2026
  • EUVDOct 25, 2026