CVE-2026-99237

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    CVE-2026-99237

    Published: 2 Nov 2026Last Modified: 5 Nov 2026

    Summary: tracing: Hold trace_types_lock when resetting last boot data from readers

    Details: In the Linux kernel, the following vulnerability has been resolved: tracing: Hold trace_types_lock when resetting last boot data from readers update_last_data_if_empty() is called from tracing_open() with O_TRUNC, tracing_read_pipe() and tracing_buffers_read() without trace_types_lock. Two readers can both pass the LAST_BOOT test and free module_delta twice, and a module notifier can update module_delta while it is being freed. Take trace_types_lock in those paths and keep the callers that already hold it on an unlocked variant.

    References: https://git.kernel.org/stable/c/1f06cfe0b60a878619d1d8efe1cd0f515b7dc2aa, https://git.kernel.org/stable/c/5a6bd62f09147b49b31fd19d4eba122cb5f941a1, https://git.kernel.org/stable/c/92b69f6db640dadc0851762ee2e12db99f083cad, https://git.kernel.org/stable/c/d6d991afe775ab7fcf89523a2502b7ca3be56ffd, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99237.json, https://nvd.nist.gov/vuln/detail/CVE-2026-99237, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 32dc0042528d385d83bf458e4cf3a49c5110afea
    Fixed -92b69f6db640dadc0851762ee2e12db99f083cad

    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-2026-99237 | CVE-DB