UBUNTU-CVE-2021-4011

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    UBUNTU-CVE-2021-4011

    Published: 14 Dec 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-4011

    Summary:

    Details: A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SwapCreateRegister function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

    References: https://ubuntu.com/security/CVE-2021-4011, https://www.openwall.com/lists/oss-security/2021/12/14/1, https://ubuntu.com/security/notices/USN-5193-1, https://ubuntu.com/security/notices/USN-5193-2, https://ubuntu.com/security/notices/USN-5193-3, https://www.cve.org/CVERecord?id=CVE-2021-4011

    Affected packages

    Package

    Name: xorg-server

    Purl: pkg:deb/ubuntu/xorg-server@2:1.15.1-0ubuntu2.11+esm5?arch=source&distro=trusty/esm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -2:1.15.1-0ubuntu2.11+esm5

    Affected versions

    2:1.14.3-3ubuntu2
    2:1.14.3-3ubuntu3
    2:1.14.3-3ubuntu4
    2:1.14.3-5ubuntu1
    2:1.14.4-1ubuntu1
    2:1.14.4-1ubuntu2
    2:1.14.4.901-0ubuntu2
    2:1.14.5-1ubuntu2
    2:1.14.5-1ubuntu4

    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-2021-4011 | CVE-DB