DEBIAN-CVE-2023-34322

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    DEBIAN-CVE-2023-34322

    Published: 5 Jan 2024Last Modified: 26 Oct 2026
    Upstream:
    CVE-2023-34322

    Summary:

    Details: For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. Since Xen itself needs to be mapped when PV guests run, Xen and shadowed PV guests run directly the respective shadow page tables. For 64-bit PV guests this means running on the shadow of the guest root page table. In the course of dealing with shortage of memory in the shadow pool associated with a domain, shadows of page tables may be torn down. This tearing down may include the shadow root page table that the CPU in question is presently running on. While a precaution exists to supposedly prevent the tearing down of the underlying live page table, the time window covered by that precaution isn't large enough.

    References: https://security-tracker.debian.org/tracker/CVE-2023-34322

    Affected packages

    Package

    Name: xen

    Purl: pkg:deb/debian/xen?arch=source&distro=bookworm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -4.17.2+76-ge1f9cb16e2-1~deb12u1

    Affected versions

    4.17.1+2-gb773c48e36-1
    4.17.2+55-g0b56bed864-1
    4.17.2-1

    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
    DEBIAN-CVE-2023-34322 | CVE-DB