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    CVE-2021-40507

    An issue was discovered in the ALU unit of the OR1200 (aka OpenRISC 1200) processor 2011-09-10 through 2015-11-11. The overflow flag is not being updated correctly for the subtract instruction, which results in an incorrect value in the overflow flag. Any software that relies on this flag may experience corruption in execution.

    Published:Apr 18, 2023
    Last Modified:Feb 6, 2025
    EPS:Apr 18, 2023
    EPSS Score:0.00111
    CVSS Score:9.8

    Affected Products

    Vendor
    Openrisc
    Product
    Or1200
    Vendor
    Openrisc
    Product
    Or1200 Firmware

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-287 Improper Authentication

    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