CVE-2021-30465

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    CVE-2021-30465

    Published: 27 May 2021Last Modified: 8 Jul 2026

    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://lists.debian.org/debian-lts-announce/2023/03/msg00023.html, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35ZW6NBZSBH5PWIT7JU4HXOXGFVDCOHH/, https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4HOARVIT47RULTTFWAU7XBG4WY6TDDHV/, http://www.openwall.com/lists/oss-security/2021/05/19/2, https://github.com/opencontainers/runc/releases, https://security.gentoo.org/glsa/202107-26, https://security.netapp.com/advisory/ntap-20210708-0003/, https://bugzilla.opensuse.org/show_bug.cgi?id=1185405, https://github.com/opencontainers/runc/commit/0ca91f44f1664da834bc61115a849b56d22f595f, https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    1.0.0-rc1
    1.0.0-rc10
    1.0.0-rc2
    1.0.0-rc3
    1.0.0-rc4
    1.0.0-rc5
    1.0.0-rc6
    1.0.0-rc7
    1.0.0-rc8
    1.0.0-rc9
    1.0.0-rc91
    1.0.0-rc92
    1.0.0-rc93
    1.0.0-rc94

    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
    CVE-2021-30465 | CVE-DB