UBUNTU-CVE-2021-30465

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    UBUNTU-CVE-2021-30465

    Published: 19 May 2021Last Modified: 4 Feb 2026
    Upstream:
    CVE-2021-30465

    Summary:

    Details: runc before 1.0.0-rc95 allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition.

    References: https://ubuntu.com/security/CVE-2021-30465, https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r, https://ubuntu.com/security/notices/USN-4960-1, https://www.cve.org/CVERecord?id=CVE-2021-30465, https://ubuntu.com/security/notices/USN-4867-1

    Affected packages

    Package

    Name: runc

    Purl: pkg:deb/ubuntu/[email protected]~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2?arch=source&distro=esm-apps/xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.0.0~rc7+git20190403.029124da-0ubuntu1~16.04.4+esm2

    Affected versions

    0.0.8+dfsg-2

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    UBUNTU-CVE-2021-30465 | CVE-DB