{"id":"CVE-2023-42753","title":"An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel","summary":"An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decre…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787","CWE-787"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 4.4.165, < 4.5","linux_kernel >= 4.9.141, < 4.10","linux_kernel >= 4.14.84, < 4.15","linux_kernel >= 4.19.5, < 4.19.295","linux_kernel >= 4.20, < 5.4.257","linux_kernel >= 5.5, < 5.10.195","linux_kernel >= 5.11, < 5.15.132","linux_kernel >= 5.16, < 6.1.53","linux_kernel >= 6.2, < 6.4.16","linux_kernel >= 6.5, < 6.5.3","enterprise_linux = 7.0","enterprise_linux = 8.0","enterprise_linux = 9.0","debian_linux = 10.0"],"patched":["linux_kernel 6.5.3"],"published":"2023-09-25","updated":"2026-08-06","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-42753","references":[{"url":"https://access.redhat.com/errata/RHSA-2023:7370","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2023:7379","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-2023:7418","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2023:7539","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2023:7558","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0089","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0113","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0134","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0340","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0346","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0347","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0371","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0376","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0378","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0402","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0403","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0412","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0461","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0562","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0563","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0593","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:0999","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2023-42753","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2239843","label":"secalert@redhat.com"},{"url":"https://seclists.org/oss-sec/2023/q3/216","label":"secalert@redhat.com"},{"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-2023:7370","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2023:7379","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-2023:7418","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2023:7539","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2023:7558","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0089","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0113","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0134","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0340","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0346","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0347","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0371","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0376","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0378","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0402","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0403","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0412","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0461","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0562","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0563","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0593","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:0999","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/security/cve/CVE-2023-42753","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2239843","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://lists.debian.org/debian-lts-announce/2024/01/msg00004.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://seclists.org/oss-sec/2023/q3/216","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.openwall.com/lists/oss-security/2023/09/22/10","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.0051,"epssPercentile":0.42521,"ingestedAt":"2026-08-06T23:06:28.831Z","slug":"CVE-2023-42753","body":"## Overview\n\nAn array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system or potentially escalate their privileges on the system.\n\n## Affected\n\n- `linux_kernel >= 4.4.165, < 4.5`\n- `linux_kernel >= 4.9.141, < 4.10`\n- `linux_kernel >= 4.14.84, < 4.15`\n- `linux_kernel >= 4.19.5, < 4.19.295`\n- `linux_kernel >= 4.20, < 5.4.257`\n- `linux_kernel >= 5.5, < 5.10.195`\n- `linux_kernel >= 5.11, < 5.15.132`\n- `linux_kernel >= 5.16, < 6.1.53`\n- `linux_kernel >= 6.2, < 6.4.16`\n- `linux_kernel >= 6.5, < 6.5.3`\n- `enterprise_linux = 7.0`\n- `enterprise_linux = 8.0`\n- `enterprise_linux = 9.0`\n- `debian_linux = 10.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.5.3`","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}