UBUNTU-CVE-2023-31436

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    UBUNTU-CVE-2023-31436

    Published: 28 Apr 2023Last Modified: 9 Sept 2026
    Upstream:
    CVE-2023-31436
    Aliases:
    USN-6127-1
    USN-6130-1
    USN-6131-1

    Summary:

    Details: qfq_change_class in net/sched/sch_qfq.c in the Linux kernel before 6.2.13 allows an out-of-bounds write because lmax can exceed QFQ_MIN_LMAX.

    References: https://ubuntu.com/security/CVE-2023-31436, https://git.kernel.org/linus/3037933448f60f9acb705997eae62013ecb81e0d, https://github.com/torvalds/linux/commit/3037933448f60f9acb705997eae62013ecb81e0d, https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.13, https://www.spinics.net/lists/stable-commits/msg294885.html, https://ubuntu.com/security/notices/USN-6127-1, https://ubuntu.com/security/notices/USN-6130-1, https://ubuntu.com/security/notices/USN-6131-1, https://ubuntu.com/security/notices/USN-6132-1, https://ubuntu.com/security/notices/USN-6135-1, https://ubuntu.com/security/notices/USN-6149-1, https://ubuntu.com/security/notices/USN-6150-1, https://ubuntu.com/security/notices/USN-6162-1, https://ubuntu.com/security/notices/USN-6173-1, https://ubuntu.com/security/notices/USN-6175-1, https://ubuntu.com/security/notices/USN-6186-1, https://ubuntu.com/security/notices/USN-6222-1, https://ubuntu.com/security/notices/USN-6256-1, https://ubuntu.com/security/notices/USN-6385-1, https://ubuntu.com/security/notices/USN-6460-1, https://www.cve.org/CVERecord?id=CVE-2023-31436

    Affected packages

    Package

    Name: linux

    Purl: pkg:deb/ubuntu/linux?arch=source&distro=trusty%2Fesm

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -3.13.0-194.245

    Affected versions

    3.11.0-12.19

    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-2023-31436 | CVE-DB