{"id":"CVE-2022-2586","published":"2024-01-08T18:15:44Z","modified":"2026-10-14T18:25:45Z","title":"Linux Kernel Use-After-Free Vulnerability","vendor":"Linux","product":"Kernel","tier":"core","eol":null,"description":{"text":"It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that table was deleted.","provenance":"source","from":"NVD"},"summary":{"text":"The Linux kernel's netfilter (nftables) subsystem contains a use-after-free flaw in which an nft object or expression can reference an nft set belonging to a different nft table, and the reference becomes dangling once that table is deleted. A local attacker with low privileges and no user interaction can trigger the freed memory to be accessed, which the attack vector indicates can compromise confidentiality, integrity and availability.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-29T07:11:18Z"},"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":"NVD"},"epss":{"score":0.10202,"percentile":0.95657,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2024-06-26","dueDate":"2024-07-17","ransomware":false,"requiredAction":"Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.","notes":"This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. For more information, please see: https://seclists.org/oss-sec/2022/q3/131;  https://nvd.nist.gov/vuln/detail/CVE-2022-2586","provenance":"source"},"vulncheckKev":{"dateAdded":"2024-06-19","exploitedFirstSeen":"2024-06-19","ransomware":false,"evidence":[{"url":"https://www.ptsecurity.com/ww-en/analytics/pt-esc-threat-intelligence/excobalt-gored-the-hidden-tunnel-technique/","date":"2024-06-19"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2024-06-26"}],"evidenceTotal":2,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 29, 2026","url":"https://otx.alienvault.com/pulse/6ae20c1db17e7057ae7d9ad1","created":"2026-10-28"},{"name":"Actively_Exploited_Kev | Oct 28, 2026","url":"https://otx.alienvault.com/pulse/6ae0ba7e0e2a97ff7b218819","created":"2026-10-27"},{"name":"Actively_Exploited_Kev | Oct 27, 2026","url":"https://otx.alienvault.com/pulse/6adf68b85c3e852f3c111d18","created":"2026-10-26"},{"name":"Actively_Exploited_Kev | Oct 24, 2026","url":"https://otx.alienvault.com/pulse/6adb740e397c3ad4799aa4cd","created":"2026-10-23"},{"name":"Actively_Exploited_Kev | Oct 23, 2026","url":"https://otx.alienvault.com/pulse/6ada236fcfba2dfa730ea482","created":"2026-10-22"},{"name":"Actively_Exploited_Kev | Oct 22, 2026","url":"https://otx.alienvault.com/pulse/6ad8d33a077cbb5cab524d80","created":"2026-10-21"},{"name":"Actively_Exploited_Kev | Oct 21, 2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"},{"name":"Actively_Exploited_Kev | Oct 18, 2026","url":"https://otx.alienvault.com/pulse/6ad38c22e1848f8189d1c121","created":"2026-10-17"}],"provenance":"machine"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"references":[{"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2586","tags":["Third Party Advisory"]},{"url":"https://lore.kernel.org/netfilter-devel/20220809170148.164591-1-cascardo@canonical.com/T/#t","tags":["Mailing List","Patch"]},{"url":"https://ubuntu.com/security/notices/USN-5557-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5560-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5560-2","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5562-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5564-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5565-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5566-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5567-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5582-1","tags":["Third Party Advisory"]},{"url":"https://www.openwall.com/lists/oss-security/2022/08/09/5","tags":["Mailing List"]},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-22-1118/","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2586","tags":["Third Party Advisory"]},{"url":"https://lore.kernel.org/netfilter-devel/20220809170148.164591-1-cascardo@canonical.com/T/#t","tags":["Mailing List","Patch"]},{"url":"https://ubuntu.com/security/notices/USN-5557-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5560-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5560-2","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5562-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5564-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5565-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5566-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5567-1","tags":["Third Party Advisory"]},{"url":"https://ubuntu.com/security/notices/USN-5582-1","tags":["Third Party Advisory"]},{"url":"https://www.openwall.com/lists/oss-security/2022/08/09/5","tags":["Mailing List"]},{"url":"https://www.vicarius.io/vsociety/posts/use-after-free-vulnerability-linked-chain-between-nft-tables-cve-2022-2586","tags":["Exploit","Third Party Advisory"]},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-22-1118/","tags":["Third Party Advisory","VDB Entry"]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-794697.html","tags":["Third Party Advisory"]},{"url":"https://cert-portal.siemens.com/productcert/html/ssa-806742.html","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-2586","tags":["US Government Resource"]}],"techniques":[{"id":"T1068","name":"Exploitation for Privilege Escalation","tactics":["privilege-escalation"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: local privilege escalation via kernel use-after-free","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"leading to a use-after-free once that table was deleted","start":102,"end":157}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"},{"id":"T1059","name":"Command and Scripting Interpreter","tactics":["execution"],"provenance":"ai","basis":"ai-mapping","bases":["ai-mapping"],"basisDetail":"claude-haiku-5-5: use-after-free enables arbitrary kernel code execution","mappingType":"primary_impact","evidence":[{"from":"description","quote":"a nft object or expression could reference a nft set","start":23,"end":75}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2022-34835","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-34835","exploited":true,"exploitedSince":"2024-06-26","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":2,"skipped":1,"earliest":"2022-09-03","earliestUrl":"https://github.com/aels/CVE-2022-2586-LPE","repos":[{"name":"aels/CVE-2022-2586-LPE","url":"https://github.com/aels/CVE-2022-2586-LPE","stars":22,"created":"2022-09-03"},{"name":"sniper404ghostxploit/CVE-2022-2586","url":"https://github.com/sniper404ghostxploit/CVE-2022-2586","stars":2,"created":"2022-11-06"}]},"first":{"date":"2022-09-03","source":"PoC-in-GitHub","url":"https://github.com/aels/CVE-2022-2586-LPE"},"provenance":"source"},"exploitRefs":["https://www.vicarius.io/vsociety/posts/use-after-free-vulnerability-linked-chain-between-nft-tables-cve-2022-2586"],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"},{"stage":"primary","techniques":["T1059"],"provenance":"ai"}],"timeline":[{"date":"2022-09-03","kind":"exploit-public","label":"First 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