UBUNTU-CVE-2023-6856

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    UBUNTU-CVE-2023-6856

    Published: 20 Dec 2023Last Modified: 22 Apr 2026
    Upstream:
    CVE-2023-6856

    Summary:

    Details: The WebGL `DrawElementsInstanced` method was susceptible to a heap buffer overflow when used on systems with the Mesa VM driver. This issue could allow an attacker to perform remote code execution and sandbox escape. This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

    References: https://ubuntu.com/security/CVE-2023-6856, https://www.mozilla.org/en-US/security/advisories/mfsa2023-56/#CVE-2023-6856, https://www.mozilla.org/en-US/security/advisories/mfsa2023-55/#CVE-2023-6856, https://www.mozilla.org/en-US/security/advisories/mfsa2023-54/#CVE-2023-6856, https://bugzilla.mozilla.org/show_bug.cgi?id=1843782, https://www.mozilla.org/security/advisories/mfsa2023-54/, https://www.mozilla.org/security/advisories/mfsa2023-55/, https://www.mozilla.org/security/advisories/mfsa2023-56/, https://ubuntu.com/security/notices/USN-6562-1, https://ubuntu.com/security/notices/USN-6563-1, https://www.cve.org/CVERecord?id=CVE-2023-6856

    Affected packages

    Package

    Name: mozjs52

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

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    52.3.1-0ubuntu3
    52.3.1-7fakesync1

    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-2023-6856 | CVE-DB