UBUNTU-CVE-2022-23034

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    UBUNTU-CVE-2022-23034

    Published: 25 Jan 2022Last Modified: 20 May 2026
    Upstream:
    CVE-2022-23034

    Summary:

    Details: A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. When both are in use for any individual mapping, unmapping of such a mapping can be requested in two steps. The reference count for such a mapping would then mistakenly be decremented twice. Underflow of the counters gets detected, resulting in the triggering of a hypervisor bug check.

    References: https://ubuntu.com/security/CVE-2022-23034, https://xenbits.xen.org/xsa/advisory-394.html, https://xenbits.xenproject.org/xsa/advisory-394.txt, https://www.cve.org/CVERecord?id=CVE-2022-23034

    Affected packages

    Package

    Name: xen

    Purl: pkg:deb/ubuntu/xen?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.5.1-0ubuntu1
    4.5.1-0ubuntu2

    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-2022-23034 | CVE-DB