{"cve":"CVE-2026-80636","nvd":{"published":"2026-08-28T08:16:48.513","modified":"2026-08-28T08:16:48.513","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: conntrack: revert ct extension genid infrastructure\n\nThis infrastructure is not used anymore after moving ct timeout and\nhelper to use datapath refcount to track object use.\n\nRevert commit c56716c69ce1 (\"netfilter: extensions: introduce extension\ngenid count\") this patch disables all ct extensions (leading to NULL)\nfor unconfirmed conntracks, when this is only targeted at ct helper and\nct timeout. There is also codebase that dereferences the ct extension\nwithout checking for NULL which could lead to crash.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/35e21a4dccc5c255ba59ccfbfeb4629ed21da972","https://git.kernel.org/stable/c/61eab1d0237eb513fe73e391a5926ee70092c325","https://git.kernel.org/stable/c/6bba4846f196d081bf553391d12b5a73dcc48685","https://git.kernel.org/stable/c/a052a94bcc629acaecc2ce42a4af77f8fa399757","https://git.kernel.org/stable/c/d53eecbca16f056abba274075cb15120ab062518"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-80636","score":0.00209,"percentile":0.11054,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}