{"id":"CVE-2023-31248","published":"2023-07-05T18:33:59Z","modified":"2025-03-05T18:54:52Z","title":"Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability","vendor":"Linux","product":"Linux Kernel","tier":"core","eol":null,"affectedVersions":[{"vendor":"Linux","product":"Linux Kernel","versions":["v5.9-rc1"]}],"description":{"text":"Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace","provenance":"source","from":"CVE.org"},"summary":null,"cvss":{"score":7.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.0189,"percentile":0.79498,"date":"2026-10-29","provenance":"source"},"kev":null,"vulncheckKev":{"dateAdded":"2024-12-06","exploitedFirstSeen":"2024-12-06","ransomware":false,"evidence":[{"url":"https://securelist.com/exploits-and-vulnerabilities-q3-2024/114839/","date":"2024-12-06"}],"evidenceTotal":1,"provenance":"source"},"exploited":true,"otx":{"pulseCount":2,"pulses":[{"name":"CVE Data","url":"https://otx.alienvault.com/pulse/69929b597293fe5837b9c95c","created":"2026-02-16"},{"name":"Security update for the Linux Kernel | SUSE Support","url":"https://otx.alienvault.com/pulse/64dcffbe5d3c31e8e505fd8f","created":"2023-08-16"}],"provenance":"machine"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"references":[{"url":"https://lore.kernel.org/netfilter-devel/20230705121627.GC19489@breakpoint.cc/T/","tags":["issue-tracking"]},{"url":"https://www.openwall.com/lists/oss-security/2023/07/05/2","tags":["mailing-list"]},{"url":"http://www.openwall.com/lists/oss-security/2023/07/05/2","tags":[]},{"url":"https://www.debian.org/security/2023/dsa-5453","tags":[]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UPHI46ROSSLVAV4R5LJWJYU747JGOS6D/","tags":[]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGZC5XOANA75OJ4XARBBXYSLDKUIJI5E/","tags":[]},{"url":"http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html","tags":[]},{"url":"https://lists.debian.org/debian-lts-announce/2023/08/msg00001.html","tags":[]},{"url":"http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html","tags":[]},{"url":"https://security.netapp.com/advisory/ntap-20240201-0001/","tags":[]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2023-35563","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-35563","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":["http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html","http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html"],"flow":[],"timeline":[{"date":"2023-07-05","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2023-31248","provenance":"source"},{"date":"2024-12-06","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://securelist.com/exploits-and-vulnerabilities-q3-2024/114839/","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":62.4,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 692 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":15.9,"detail":"percentile 0.7950"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"2 NVD exploit links"},{"name":"Mentioned in OTX pulses","points":1.08,"detail":"2 pulses"},{"name":"CVSS severity","points":5.46,"detail":"base score 7.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}