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    CVE-2023-23454

    cbq_classify in net/sched/sch_cbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results).

    Published:Jan 1, 2023
    Last Modified:Mar 20, 2025
    EPS:Jan 12, 2023
    EPSS Score:0.00053
    CVSS Score:5.5

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhev Hypervisor

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    References

    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=caa4b35b4317d5147b3ab0fbdc9c075c7d2e9c12
    https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html
    https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
    https://www.debian.org/security/2023/dsa-5324
    https://www.openwall.com/lists/oss-security/2023/01/10/1
    https://www.openwall.com/lists/oss-security/2023/01/10/4
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=caa4b35b4317d5147b3ab0fbdc9c075c7d2e9c12
    https://lists.debian.org/debian-lts-announce/2023/03/msg00000.html
    https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
    https://www.debian.org/security/2023/dsa-5324
    https://www.openwall.com/lists/oss-security/2023/01/10/1
    https://www.openwall.com/lists/oss-security/2023/01/10/4

    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