{"id":"CVE-2023-4015","title":"A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\n\nOn an error when building a nftables rule, deactivating immediate expressions in nft_immediate_d…","summary":"A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.\n\nOn an error when building a nftables rule, deactivating immediate expressions in nft_immediate_d…","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, < 5.10.190","linux_kernel >= 5.11, < 5.15.124","linux_kernel >= 5.16, < 6.1.43","linux_kernel >= 6.2, < 6.4.8","debian_linux = 12.0"],"patched":["linux_kernel 6.4.8"],"published":"2023-09-06","updated":"2026-10-14","sourceUpdated":"2026-10-14T22:17:16.713","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-4015","references":[{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2","label":"cve-coordination@google.com"},{"url":"https://kernel.dance/0a771f7b266b02d262900c75f1e175c7fe76fec2","label":"cve-coordination@google.com"},{"url":"https://www.debian.org/security/2023/dsa-5492","label":"cve-coordination@google.com"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://kernel.dance/0a771f7b266b02d262900c75f1e175c7fe76fec2","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":0.00292,"epssPercentile":0.21592,"ingestedAt":"2026-10-14T23:00:02.002Z","slug":"CVE-2023-4015","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\nOn an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.\n\nWe recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.\n\n## Affected\n\n- `linux_kernel >= 5.9, < 5.10.190`\n- `linux_kernel >= 5.11, < 5.15.124`\n- `linux_kernel >= 5.16, < 6.1.43`\n- `linux_kernel >= 6.2, < 6.4.8`\n- `debian_linux = 12.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.4.8`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}