CVE-2021-47061

    Dashboard / Vulnerabilities / CVE-2021-47061

    CVE-2021-47061

    Published: 29 Feb 2024Last Modified: 15 Mar 2026

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: KVM: Destroy I/O bus devices on unregister failure _after_ sync'ing SRCU If allocating a new instance of an I/O bus fails when unregistering a device, wait to destroy the device until after all readers are guaranteed to see the new null bus. Destroying devices before the bus is nullified could lead to use-after-free since readers expect the devices on their reference of the bus to remain valid.

    References: https://git.kernel.org/stable/c/4e899ca848636b37e9ac124bc1723862a7d7d927, https://git.kernel.org/stable/c/03c6cccedd3913006744faa252a4da5145299343, https://git.kernel.org/stable/c/2ee3757424be7c1cd1d0bbfa6db29a7edd82a250, https://git.kernel.org/stable/c/30f46c6993731efb2a690c9197c0fd9ed425da2d

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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
    CVE-2021-47061 | CVE-DB