{"id":"CVE-2026-116540","aliases":["DEBIAN-CVE-2026-116540","EUVD-2026-109910","GHSA-fgcj-53j7-r6vq","GHSA-mmc8-vg2v-fvvw","UBUNTU-CVE-2026-116540","openSUSE-SU-2026:12403-1"],"status":"published","title":"netty-tcnative 2.0.66.Final before 2.0.84.Final Use-After-Free in Session Ticket Callback","description":"netty-tcnative 2.0.66.Final before 2.0.84.Final built against OpenSSL 3.x contains a use-after-free vulnerability in ssl_tlsext_ticket_key_cb during session ticket key rotation. Remote clients performing TLS handshakes while setSessionTicketKeys0 frees the shared key array cause OpenSSL to read freed HMAC keys, crashing or corrupting ticket processing.","severity":{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00459,"percentile":0.40234,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-416"],"published":"2026-10-26T14:59:40Z","modified":"2026-11-04T17:27:19Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"netty-tcnative","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.28-1"]},{"source":"osv","ecosystem":"Debian:13","package":"netty-tcnative","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.28-1"]},{"source":"osv","ecosystem":"Debian:14","package":"netty-tcnative","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.28-1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"netty-tcnative","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.33.Fork6-1","1.1.33.Fork10-2","1.1.33.Fork14-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"netty-tcnative","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.33.Fork26-1","1.1.33.Fork26-1build1"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"netty-tcnative","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.20-1","2.0.28-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"netty-tcnative","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.28-1","2.0.28-1build1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"netty-tcnative","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.28-1build1","2.0.28-1build2","2.0.28-1build3","2.0.28-1build4"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"netty-tcnative","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.28-1build5","2.0.28-1build6"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"netty-tcnative","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.28-1build4","2.0.28-1build5"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"netty-tcnative","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.85-1.1"}]}],"bundled":4}],"products":[{"vendor":"netty","product":"netty-tcnative"}],"references":[{"url":"https://github.com/netty/netty-tcnative/security/advisories/GHSA-mmc8-vg2v-fvvw","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/netty/netty-tcnative/commit/59662a8b07a9a7623ae1bc472f5751f31c81a118","tags":["patch","fix","report"]},{"url":"https://github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.Final/openssl-dynamic/src/main/c/sslcontext.c#L1365","tags":["technical-description","article"]},{"url":"https://github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.Final","tags":["release-notes","advisory"]},{"url":"https://github.com/netty/netty-tcnative","tags":["product","package","report"]},{"url":"https://www.vulncheck.com/advisories/netty-tcnative-2.0.66-final-before-2.0.84-final-use-after-free-in-session-ticket-callback","tags":["third-party-advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116540","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-fgcj-53j7-r6vq"},{"url":"https://repo1.maven.org/maven2/io/netty/netty-tcnative/","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116540.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-116540","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-116540","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-116540","tags":["report"]},{"url":"https://repo1.maven.org/maven2/io/netty/netty-tcnative","tags":["report"]},{"url":"https://github.com/cveproject/cvelistv5/tree/main/cves/2026/116xxx/cve-2026-116540.json","tags":["report"]},{"url":"https://github.com/netty/netty-tcnative/blob/netty-tcnative-parent-2.0.83.final/openssl-dynamic/src/main/c/sslcontext.c#l1365","tags":["report"]},{"url":"https://github.com/netty/netty-tcnative/releases/tag/netty-tcnative-parent-2.0.84.final","tags":["report"]},{"url":"https://github.com/netty/netty-tcnative/security/advisories/ghsa-mmc8-vg2v-fvvw","tags":["report"]},{"url":"https://nvd.nist.gov/vuln/detail/cve-2026-116540","tags":["report"]},{"url":"https://security-tracker.debian.org/tracker/cve-2026-116540","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-116539","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-116540","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-116541","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-116542","tags":["web"]}],"sources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Remote clients performing TLS handshakes while setSessionTicketKeys0 frees the shared key array cause OpenSSL to read freed HMAC keys, crashing or corrupting ticket processing.","status":"published","published":"2026-10-26T14:59:40.154Z","modified":"2026-10-26T16:15:16.184Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:20:03.827373Z"}],"euvd":[{"id":"EUVD-2026-109910","description":"netty-tcnative 2.0.66.Final before 2.0.84.Final built against OpenSSL 3.x contains a use-after-free vulnerability in ssl_tlsext_ticket_key_cb during session ticket key rotation. Remote clients performing TLS handshakes while setSessionTicketKeys0 frees the shared key array cause OpenSSL to read freed HMAC keys, crashing or corrupting ticket processing.","status":"published","published":"2026-10-26T14:59:40Z","modified":"2026-10-26T16:15:16Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:59:29.132426Z"}],"ghsa":[{"id":"GHSA-fgcj-53j7-r6vq","title":"netty-tcnative 2.0.66.Final before 2.0.84.Final built against OpenSSL 3.x contains a use-after...","description":"netty-tcnative 2.0.66.Final before 2.0.84.Final built against OpenSSL 3.x contains a use-after-free vulnerability in ssl_tlsext_ticket_key_cb during session ticket key rotation. 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Remote clients performing TLS handshakes while setSessionTicketKeys0 frees the shared key array cause OpenSSL to read freed HMAC keys, crashing or corrupting ticket processing.","status":"published","published":"2026-10-26T16:17:19.377Z","modified":"2026-10-26T17:17:27.187Z","cvss":[{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:13:03.452847Z"}],"osv":[{"id":"CVE-2026-116540","title":"netty-tcnative 2.0.66.Final before 2.0.84.Final Use-After-Free in Session Ticket Callback","description":"netty-tcnative 2.0.66.Final before 2.0.84.Final built against OpenSSL 3.x contains a use-after-free vulnerability in ssl_tlsext_ticket_key_cb during session ticket key rotation. 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Remote clients performing TLS handshakes while setSessionTicketKeys0 frees the shared key array cause OpenSSL to read freed HMAC keys, crashing or corrupting ticket processing.","status":"published","published":"2026-10-26T16:17:00Z","modified":"2026-10-28T20:17:33.465983263Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"},{"version":"4.0","score":8.2,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T16:56:00.081948Z"},{"id":"openSUSE-SU-2026:12403-1","title":"netty-tcnative-2.0.85-1.1 on GA media","description":"These are all security issues fixed in the netty-tcnative-2.0.85-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-11-03T00:00:00Z","modified":"2026-11-04T17:23:22.226909894Z","updated_at":"2026-11-04T17:43:22.558805Z"}]}}