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    CVE-2023-6817

    A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. The function nft_pipapo_walk did not skip inactive elements during set walk which could lead double deactivations of PIPAPO (Pile Packet Policies) elements, leading to use-after-free. We recommend upgrading past commit 317eb9685095678f2c9f5a8189de698c5354316a.

    Published:Dec 18, 2023
    Last Modified:May 12, 2026
    EPS:Dec 18, 2023
    EPSS Score:0.00021
    CVSS Score:7.8

    Affected Products

    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Logging
    Vendor
    Redhat
    Product
    Rhel Aus
    Vendor
    Redhat
    Product
    Rhel E4s
    Vendor
    Redhat
    Product
    Rhel Eus
    Vendor
    Redhat
    Product
    Rhel Tus
    Vendor
    Redhat
    Product
    Rhev Hypervisor

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    References

    http://packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html
    http://www.openwall.com/lists/oss-security/2023/12/22/13
    http://www.openwall.com/lists/oss-security/2023/12/22/6
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=317eb9685095678f2c9f5a8189de698c5354316a
    https://kernel.dance/317eb9685095678f2c9f5a8189de698c5354316a
    https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
    http://packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html
    http://www.openwall.com/lists/oss-security/2023/12/22/13
    http://www.openwall.com/lists/oss-security/2023/12/22/6
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=317eb9685095678f2c9f5a8189de698c5354316a
    https://kernel.dance/317eb9685095678f2c9f5a8189de698c5354316a
    https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
    https://cert-portal.siemens.com/productcert/html/ssa-265688.html
    https://cert-portal.siemens.com/productcert/html/ssa-398330.html

    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