UBUNTU-CVE-2026-99238

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    UBUNTU-CVE-2026-99238

    Published: 2 Nov 2026Last Modified: 6 Nov 2026
    Upstream:
    CVE-2026-99238

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: tracing: Hold trace_types_lock when updating modules in persistent instances trace_module_record() walks ftrace_trace_arrays from the module notifier without trace_types_lock. A concurrent rmdir of an instance removes it from the list and frees it under that lock, so a module load or unload can walk into a freed trace_array.

    References: https://ubuntu.com/security/CVE-2026-99238, https://www.cve.org/CVERecord?id=CVE-2026-99238, https://git.kernel.org/stable/c/57408eac99b0d8a005796346d317d31f0ca4e07a, https://git.kernel.org/stable/c/dab2bd4d67ad5eaa95019a9511f8d379401b5021, https://git.kernel.org/stable/c/244c442f54601a24c86ad90572bf36fc3df41c5e

    Affected packages

    Package

    Name: linux-hwe-edge

    Purl: pkg:deb/ubuntu/linux-hwe-edge?arch=source&distro=xenial

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -None

    Affected versions

    4.8.0-28.30~16.04.1
    4.8.0-30.32~16.04.1
    4.8.0-32.34~16.04.1
    4.8.0-34.36~16.04.1

    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
    UBUNTU-CVE-2026-99238 | CVE-DB