UBUNTU-CVE-2026-99232

    Dashboard / Vulnerabilities / UBUNTU-CVE-2026-99232

    UBUNTU-CVE-2026-99232

    Published: 2 Nov 2026Last Modified: 6 Nov 2026
    Upstream:
    CVE-2026-99232

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: tracing/syscalls: Use copy_from_user for the faultable syscall buffer syscall_copy_user_array() copies the buffer argument of faultable syscalls (write, pwrite64, ...) with __copy_from_user(), which skips access_ok(). Use copy_from_user() instead so a non-user address is rejected and the entry is recorded as faulted. It could be a security concern for machines that trust perf a bit too much.

    References: https://ubuntu.com/security/CVE-2026-99232, https://www.cve.org/CVERecord?id=CVE-2026-99232, https://git.kernel.org/stable/c/e33e2718c62a602001ab549642a1aed0be797105, https://git.kernel.org/stable/c/041d1a568a11a7ed7415ef1408d0c65041c1ad69

    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-2026-99232 | CVE-DB