{"id":"CVE-2024-1086","published":"2024-01-31T13:15:10Z","modified":"2026-08-07T19:59:58Z","title":"Linux Kernel Use-After-Free Vulnerability","vendor":"Linux","product":"Kernel","tier":"core","eol":null,"description":{"text":"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\nThe nft_verdict_init() function allows positive values as drop error within the hook verdict, and hence the nf_hook_slow() function can cause a double free vulnerability when NF_DROP is issued with a drop error which resembles NF_ACCEPT.\n\n\n\nWe recommend upgrading past commit f342de4e2f33e0e39165d8639387aa6c19dff660.","provenance":"source","from":"NVD"},"summary":{"text":"A use-after-free flaw in the Linux kernel's netfilter nf_tables component allows the nft_verdict_init() function to accept positive values as drop errors, which can cause a double free when nf_hook_slow() processes a drop verdict. A local attacker with low-privilege access and no user interaction can exploit this to escalate privileges.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T06:59:36Z"},"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":0.28058,"percentile":0.98102,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2024-05-30","dueDate":"2024-06-20","ransomware":true,"requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","notes":"This vulnerability affects a common open-source component, third-party library, or a protocol used by different products. Please check with specific vendors for information on patching status. For more information, please see: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f342de4e2f33e0e39165d8639387aa6c19dff660;   https://nvd.nist.gov/vuln/detail/CVE-2024-1086","provenance":"source"},"vulncheckKev":{"dateAdded":"2024-05-30","exploitedFirstSeen":"2024-05-30","ransomware":true,"evidence":[{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2024-05-30"},{"url":"https://www.crowdstrike.com/blog/active-exploitation-linux-kernel-privilege-escalation-vulnerability/","date":"2024-06-06"},{"url":"https://blog.qualys.com/vulnerabilities-threat-research/2025/02/25/defense-lessons-from-the-black-basta-ransomware-playbook","date":"2025-02-25"},{"url":"https://securelist.com/vulnerabilities-and-exploits-in-q4-2024/115761/","date":"2025-02-26"},{"url":"https://www.cyfirma.com/research/tracking-ransomware-october-2025/","date":"2025-11-07"},{"url":"https://cyble.com/blog/ransomware-attacks-surge-october-2025/","date":"2025-11-13"},{"url":"https://www.loginsoft.com/reports/annually/vulnerability-intelligence-report-2025","date":"2026-01-20"}],"evidenceTotal":7,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev | Oct 30, 2026","url":"https://otx.alienvault.com/pulse/6ae35d889ea92b4ce19c2680","created":"2026-10-29"},{"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"}],"provenance":"machine"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2024/04/10/22","tags":["Mailing List","Patch"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/10/23","tags":["Mailing List","Patch"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/14/1","tags":["Exploit","Mailing List"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/15/2","tags":["Mailing List"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/17/5","tags":["Exploit","Mailing 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Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/10/22","tags":["Mailing List","Patch"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/10/23","tags":["Mailing List","Patch"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/14/1","tags":["Exploit","Mailing List"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/15/2","tags":["Mailing List"]},{"url":"http://www.openwall.com/lists/oss-security/2024/04/17/5","tags":["Exploit","Mailing List"]},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f342de4e2f33e0e39165d8639387aa6c19dff660","tags":["Patch"]},{"url":"https://github.com/Notselwyn/CVE-2024-1086","tags":["Exploit","Third Party Advisory"]},{"url":"https://kernel.dance/f342de4e2f33e0e39165d8639387aa6c19dff660","tags":["Patch"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html","tags":["Mailing List"]},{"url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","tags":["Mailing List"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7LSPIOMIJYTLZB6QKPQVVAYSUETUWKPF/","tags":["Mailing List"]},{"url":"https://news.ycombinator.com/item?id=39828424","tags":["Issue Tracking"]},{"url":"https://pwning.tech/nftables/","tags":["Exploit","Technical Description","Third Party Advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20240614-0009/","tags":["Third Party Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-1086","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 kernel bug enables privilege escalation exploitation","mappingType":"exploitation_technique","evidence":[{"from":"description","quote":"can be exploited to achieve local privilege escalation","start":84,"end":138}],"model":"claude-haiku-5-5","confidence":"medium","confidenceNote":"AI-mapped from the description (quote-validated, not expert-reviewed)"}],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2024-16861","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2024-16861","exploited":true,"exploitedSince":"2024-05-30","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":9,"skipped":8,"earliest":"2024-03-20","earliestUrl":"https://github.com/Notselwyn/CVE-2024-1086","repos":[{"name":"Notselwyn/CVE-2024-1086","url":"https://github.com/Notselwyn/CVE-2024-1086","stars":2458,"created":"2024-03-20"},{"name":"LLfam/CVE-2024-1086","url":"https://github.com/LLfam/CVE-2024-1086","stars":23,"created":"2024-12-16"},{"name":"Alicey0719/docker-POC_CVE-2024-1086","url":"https://github.com/Alicey0719/docker-POC_CVE-2024-1086","stars":3,"created":"2024-04-03"},{"name":"kevcooper/CVE-2024-1086-checker","url":"https://github.com/kevcooper/CVE-2024-1086-checker","stars":2,"created":"2024-06-03"},{"name":"sandesh9978/cve-2024-1086-lpe","url":"https://github.com/sandesh9978/cve-2024-1086-lpe","stars":1,"created":"2026-03-04"}]},"first":{"date":"2024-03-20","source":"PoC-in-GitHub","url":"https://github.com/Notselwyn/CVE-2024-1086"},"provenance":"source"},"exploitRefs":["http://www.openwall.com/lists/oss-security/2024/04/14/1","http://www.openwall.com/lists/oss-security/2024/04/17/5","https://github.com/Notselwyn/CVE-2024-1086","https://pwning.tech/nftables/"],"flow":[{"stage":"exploitation","techniques":["T1068"],"provenance":"ai"}],"timeline":[{"date":"2024-01-31","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-1086","provenance":"source"},{"date":"2024-03-20","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/Notselwyn/CVE-2024-1086","provenance":"source"},{"date":"2024-05-30","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","provenance":"source"},{"date":"2024-05-30","kind":"kev","label":"Added to CISA KEV (known ransomware use)","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2024-05-30","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2024-16861","provenance":"source"}],"speed":{"daysToPublicExploit":49,"firstExploitFrom":"PoC-in-GitHub","daysToKev":120},"priority":{"score":78.1,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 883 days ago"},{"name":"Known ransomware use","points":10.0,"detail":"CISA KEV and VulnCheck KEV: Known"},{"name":"EPSS percentile","points":19.62,"detail":"percentile 0.9810"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"4 NVD references tagged Exploit; 9 PoC-in-GitHub repos"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":5.46,"detail":"base score 7.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}