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    CVE-2023-34320

    Cortex-A77 cores (r0p0 and r1p0) are affected by erratum 1508412 where software, under certain circumstances, could deadlock a core due to the execution of either a load to device or non-cacheable memory, and either a store exclusive or register read of the Physical Address Register (PAR_EL1) in close proximity.

    Published:Dec 8, 2023
    Last Modified:Nov 4, 2025
    EPS:Dec 8, 2023
    EPSS Score:0.0005
    CVSS Score:5.5

    Affected Products

    Vendor
    Arm
    Product
    Cortex-a77
    Vendor
    Arm
    Product
    Cortex-a77 Firmware
    Vendor
    Xen
    Product
    Xen

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-667 Improper Locking

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    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