UBUNTU-CVE-2021-42762

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    UBUNTU-CVE-2021-42762

    Published: 20 Oct 2021Last Modified: 22 Apr 2026
    Upstream:
    CVE-2021-42762
    Aliases:
    USN-5127-1

    Summary:

    Details: BubblewrapLauncher.cpp in WebKitGTK and WPE WebKit before 2.34.1 allows a limited sandbox bypass that allows a sandboxed process to trick host processes into thinking the sandboxed process is not confined by the sandbox, by abusing VFS syscalls that manipulate its filesystem namespace. The impact is limited to host services that create UNIX sockets that WebKit mounts inside its sandbox, and the sandboxed process remains otherwise confined. NOTE: this is similar to CVE-2021-41133.

    References: https://ubuntu.com/security/CVE-2021-42762, https://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q, https://webkitgtk.org/security/WSA-2021-0006.html, https://ubuntu.com/security/notices/USN-5127-1, https://www.cve.org/CVERecord?id=CVE-2021-42762

    Affected packages

    Package

    Name: qtwebkit-opensource-src

    Purl: pkg:deb/ubuntu/[email protected]+dfsg-2ubuntu1?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    5.4.2+dfsg-1ubuntu2.1

    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-2021-42762 | CVE-DB