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    Dashboard / CVE / CVE-2022-33745

    CVE-2022-33745

    insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.

    Published:Jul 26, 2022
    Last Modified:Nov 21, 2024
    EPS:Jul 26, 2022
    EPSS Score:0.00051
    CVSS Score:8.8

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Xen
    Product
    Xen

    Exploits

    No exploit reference

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://www.openwall.com/lists/oss-security/2022/07/26/2
    http://www.openwall.com/lists/oss-security/2022/07/26/3
    http://xenbits.xen.org/xsa/advisory-408.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/
    https://www.debian.org/security/2022/dsa-5272
    https://xenbits.xenproject.org/xsa/advisory-408.txt
    http://www.openwall.com/lists/oss-security/2022/07/26/2
    http://www.openwall.com/lists/oss-security/2022/07/26/3
    http://xenbits.xen.org/xsa/advisory-408.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HUFIMNGYP5VQAA6KE3T2I5GW6UP6F7BS/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MYI3OMJ7RIZNL3C6GUWNANNPEUUID6FM/
    https://www.debian.org/security/2022/dsa-5272
    https://xenbits.xenproject.org/xsa/advisory-408.txt

    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