USN-5141-1

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    USN-5141-1

    Published: 11 Nov 2021Last Modified: 27 Apr 2026

    Summary: firejail vulnerability

    Details: Roman Fiedler discovered that a race condition existed in Firejail when using OverlayFS to prevent writes to the underlying file system. A local attacker could use this to gain administrative privileges. Note: this update disables support for OverlayFS in Firejail.

    References: https://ubuntu.com/security/notices/USN-5141-1, https://ubuntu.com/security/CVE-2021-26910

    Affected packages

    Package

    Name: firejail

    Purl: pkg:deb/ubuntu/[email protected]?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.9.62-3ubuntu0.1

    Affected versions

    0.9.60-2
    0.9.62-1
    0.9.62-2
    0.9.62-3

    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
    USN-5141-1 | CVE-DB