CVE-2023-2235

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    CVE-2023-2235

    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 Performance Events system can be exploited to achieve local privilege escalation. The perf_group_detach function did not check the event's siblings' attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability. We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.

    References: https://git.kernel.org, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd0815f632c24878e325821943edccc7fde947a2, https://kernel.dance/fd0815f632c24878e325821943edccc7fde947a2, https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/2xxx/CVE-2023-2235.json, https://nvd.nist.gov/vuln/detail/CVE-2023-2235, https://security.netapp.com/advisory/ntap-20230609-0002/

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 62fb9874f5da54fdb243003b386128037319b219
    Fixed -457391b0380335d5e9a5babdec90ac53928b23b4

    Affected versions

    v6.3-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-2023-2235 | CVE-DB