--- id: CVE-2023-4004 title: >- A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END summary: >- A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potenti… severity: high cvss: 7.8 cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H' cwe: - CWE-416 vendor: linux product: linux_kernel affected: - 'linux_kernel >= 5.6, < 5.10.188' - 'linux_kernel >= 5.11, < 5.15.123' - 'linux_kernel >= 5.16, < 6.1.42' - 'linux_kernel >= 6.2, < 6.4.7' - fedora = 38 - enterprise_linux = 8.0 - enterprise_linux = 9.0 - h300s - h410s - h500s - h700s - debian_linux = 10.0 - debian_linux = 11.0 - debian_linux = 12.0 patched: - linux_kernel 6.4.7 published: '2023-07-31' updated: '2026-10-14' sourceUpdated: '2026-10-14T22:17:16.357' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-4004' references: - url: 'https://access.redhat.com/errata/RHSA-2023:4961' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:4962' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:4967' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:5069' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:5091' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:5093' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:5221' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:5244' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:5255' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:5548' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:5627' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:7382' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:7389' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:7411' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:7417' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:7431' label: secalert@redhat.com - url: 'https://access.redhat.com/errata/RHSA-2023:7434' label: secalert@redhat.com - url: 'https://access.redhat.com/security/cve/CVE-2023-4004' label: secalert@redhat.com - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2225275' label: secalert@redhat.com - url: >- https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/ label: secalert@redhat.com - url: >- http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html label: af854a3a-2127-422b-91ae-364da2661108 - url: >- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:4961' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:4962' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:4967' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:5069' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:5091' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:5093' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:5221' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:5244' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:5255' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:5548' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:5627' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:7382' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:7389' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:7411' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:7417' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:7431' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/errata/RHSA-2023:7434' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://access.redhat.com/security/cve/CVE-2023-4004' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2225275' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://patchwork.ozlabs.org/project/netfilter-devel/patch/20230719190824.21196-1-fw@strlen.de/ label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://security.netapp.com/advisory/ntap-20231027-0001/' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.debian.org/security/2023/dsa-5480' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.debian.org/security/2023/dsa-5492' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e - url: 'https://cert-portal.siemens.com/productcert/html/ssa-831302.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e tags: - nvd - cve.org epss: 0.00917 epssPercentile: 0.60022 ingestedAt: '2026-10-14T23:00:02.001Z' --- ## Overview A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their privileges on the system. ## Affected - `linux_kernel >= 5.6, < 5.10.188` - `linux_kernel >= 5.11, < 5.15.123` - `linux_kernel >= 5.16, < 6.1.42` - `linux_kernel >= 6.2, < 6.4.7` - `fedora = 38` - `enterprise_linux = 8.0` - `enterprise_linux = 9.0` - `h300s` - `h410s` - `h500s` - `h700s` - `debian_linux = 10.0` - `debian_linux = 11.0` - `debian_linux = 12.0` ## Remediation Upgrade past the affected range: - `linux_kernel 6.4.7`