{"id":"CVE-2023-3777","title":"A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\n\nWhen nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound a…","summary":"A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\n\nWhen nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound a…","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 >= 5.9, < 5.10.188","linux_kernel >= 5.11, < 5.15.123","linux_kernel >= 5.16, < 6.1.42","linux_kernel >= 6.2, < 6.4.7","debian_linux = 12.0","ubuntu_linux = 14.04","ubuntu_linux = 16.04","ubuntu_linux = 18.04","ubuntu_linux = 20.04","ubuntu_linux = 22.04"],"patched":["linux_kernel 6.4.7"],"published":"2023-09-06","updated":"2026-10-14","sourceUpdated":"2026-10-14T22:17:15.917","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-3777","references":[{"url":"http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html","label":"cve-coordination@google.com"},{"url":"http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html","label":"cve-coordination@google.com"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8","label":"cve-coordination@google.com"},{"url":"https://kernel.dance/6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8","label":"cve-coordination@google.com"},{"url":"https://www.debian.org/security/2023/dsa-5492","label":"cve-coordination@google.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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://kernel.dance/6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8","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"}],"tags":["nvd","cve.org"],"epss":0.00406,"epssPercentile":0.33182,"ingestedAt":"2026-10-14T23:00:02.002Z","slug":"CVE-2023-3777","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\nWhen nf_tables_delrule() is flushing table rules, it is not checked whether the chain is bound and the chain's owner rule can also release the objects in certain circumstances.\n\nWe recommend upgrading past commit 6eaf41e87a223ae6f8e7a28d6e78384ad7e407f8.\n\n## Affected\n\n- `linux_kernel >= 5.9, < 5.10.188`\n- `linux_kernel >= 5.11, < 5.15.123`\n- `linux_kernel >= 5.16, < 6.1.42`\n- `linux_kernel >= 6.2, < 6.4.7`\n- `debian_linux = 12.0`\n- `ubuntu_linux = 14.04`\n- `ubuntu_linux = 16.04`\n- `ubuntu_linux = 18.04`\n- `ubuntu_linux = 20.04`\n- `ubuntu_linux = 22.04`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.4.7`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}