CVE-2023-2236

    Dashboard / Vulnerabilities / CVE-2023-2236

    CVE-2023-2236

    Published: 1 May 2023Last Modified: 12 Aug 2026

    Summary: Use-after-free in Linux kernel's Performance Events subsystem

    Details: A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Both io_install_fixed_file and its callers call fput in a file in case of an error, causing a reference underflow which leads to a use-after-free vulnerability. We recommend upgrading past commit 9d94c04c0db024922e886c9fd429659f22f48ea4.

    References: https://git.kernel.org, https://kernel.dance/9d94c04c0db024922e886c9fd429659f22f48ea4, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/2xxx/CVE-2023-2236.json, https://nvd.nist.gov/vuln/detail/CVE-2023-2236, https://security.netapp.com/advisory/ntap-20230601-0010/, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9d94c04c0db024922e886c9fd429659f22f48ea4

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 3d7cb6b04c3f3115719235cc6866b10326de34cd
    Fixed -830b3c68c1fb1e9176028d02ef86f3cf76aa2476

    Affected versions

    v6.1-rc1

    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-2023-2236 | CVE-DB