{"id":"CVE-2026-77205","revision":"c03ec8c229a044df99474d1513a0a36c","records":[{"revision":"c03ec8c229a044df99474d1513a0a36c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-77205","aliases":[],"title":"Denial of Service via sending bogus X.509 certificates","description":"Libreswan in FIPS mode has a vulnerability where badly formed received certificates are rejected, but not deleted from the NSS cache. As a result, any real certificates with the same serial number are rejected as well. This can be abused to lock out legitimate peers from connecting. The add_decoded_cert() function missed a call to CERT_DestroyCertificate() due to an incorrect fix for CVE-2026-14957. Sending bogus certificates with new serial numbers could prevent the real certificates with those serial numbers from connecting until the service has restarted.","state":0,"publishedAt":"2026-10-13T21:28:03.39+00:00","modifiedAt":"2026-10-16T15:31:54.457+00:00","affected":[{"ecosystem":"https://github.com/libreswan/libreswan","name":"libreswan","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"The Libreswan Project\",\n                    \"product\": \"libreswan\",\n                    \"packageName\": \"libreswan\",\n                    \"collectionURL\": \"https://github.com/libreswan/libreswan\",\n                    \"repo\": \"https://github.com/libreswan/libreswan\",\n                    \"versions\": [\n                        {\n                            \"version\": \"5.3\",\n                            \"status\": \"affected\",\n                            \"lessThanOrEqual\": \"5.3.2\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.3.3\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\",\n                    \"programRoutines\": [\n                        {\n                            \"name\": \"add_decoded_cert\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","score":3.7,"severity":"LOW"}],"references":["https://libreswan.org/security/CVE-2026-77205/CVE-2026-77205.txt","https://libreswan.org/security/CVE-2026-77205/","https://libreswan.org/security/CVE-2026-14957/CVE-2026-14957.txt"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-77205","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-77205","identifiers":["CVE-2026-77205"]},"retained":false,"historicalAffected":[]}],"coverage":[]}