UBUNTU-CVE-2021-3939

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    UBUNTU-CVE-2021-3939

    Published: 16 Nov 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-3939
    Aliases:
    USN-5149-1

    Summary:

    Details: Ubuntu-specific modifications to accountsservice (in patch file debian/patches/0010-set-language.patch) caused the fallback_locale variable, pointing to static storage, to be freed, in the user_change_language_authorized_cb function. This is reachable via the SetLanguage dbus function. This is fixed in versions 0.6.55-0ubuntu12~20.04.5, 0.6.55-0ubuntu13.3, 0.6.55-0ubuntu14.1.

    References: https://ubuntu.com/security/CVE-2021-3939, https://ubuntu.com/security/notices/USN-5149-1, https://www.cve.org/CVERecord?id=CVE-2021-3939

    Affected packages

    Package

    Name: accountsservice

    Purl: pkg:deb/ubuntu/[email protected]~20.04.5?arch=source&distro=focal

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -0.6.55-0ubuntu12~20.04.5

    Affected versions

    0.6.55-0ubuntu10
    0.6.55-0ubuntu11
    0.6.55-0ubuntu12~20.04.1
    0.6.55-0ubuntu12~20.04.2
    0.6.55-0ubuntu12~20.04.4

    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-2021-3939 | CVE-DB