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    CVE-2023-3611

    An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks. We recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64.

    Published:Jul 21, 2023
    Last Modified:Feb 13, 2025
    EPS:Jul 21, 2023
    EPSS Score:0.00014
    CVSS Score:7.8

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Linux
    Product
    Kernel
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Els
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Extras Rt
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Redhat
    Product
    Rhev Hypervisor

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e337087c3b5805fe0b8a46ba622a962880b5d64
    https://kernel.dance/3e337087c3b5805fe0b8a46ba622a962880b5d64
    https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
    https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
    https://security.netapp.com/advisory/ntap-20230908-0002/
    https://www.debian.org/security/2023/dsa-5480
    https://www.debian.org/security/2023/dsa-5492
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e337087c3b5805fe0b8a46ba622a962880b5d64
    https://kernel.dance/3e337087c3b5805fe0b8a46ba622a962880b5d64
    https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
    https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
    https://security.netapp.com/advisory/ntap-20230908-0002/
    https://www.debian.org/security/2023/dsa-5480
    https://www.debian.org/security/2023/dsa-5492

    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