{"id":"CVE-2023-4244","title":"A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\n\n\n\nDue to a race condition between nf_tables netlink control plane transaction and nft_set elemen…","summary":"A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\n\n\n\nDue to a race condition between nf_tables netlink control plane transaction and nft_set elemen…","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","CWE-416"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel < 6.5","debian_linux = 10.0"],"patched":["linux_kernel 6.5"],"published":"2023-09-06","updated":"2026-07-28","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-4244","references":[{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e91b0ebd994635df2346353322ac51ce84ce6d8","label":"cve-coordination@google.com"},{"url":"https://kernel.dance/3e91b0ebd994635df2346353322ac51ce84ce6d8","label":"cve-coordination@google.com"},{"url":"https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html","label":"cve-coordination@google.com"},{"url":"https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html","label":"cve-coordination@google.com"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3e91b0ebd994635df2346353322ac51ce84ce6d8","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://kernel.dance/3e91b0ebd994635df2346353322ac51ce84ce6d8","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"}],"tags":["nvd"],"epss":0.00241,"epssPercentile":0.15494,"ingestedAt":"2026-07-28T16:37:02.911Z","slug":"CVE-2023-4244","body":"## Overview\n\nA use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\n\n\n\nDue to a race condition between nf_tables netlink control plane transaction and nft_set element garbage collection, it is possible to underflow the reference counter causing a use-after-free vulnerability.\n\n\n\nWe recommend upgrading past commit 3e91b0ebd994635df2346353322ac51ce84ce6d8.\n\n## Affected\n\n- `linux_kernel < 6.5`\n- `debian_linux = 10.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.5`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}