{"schema":"threatline.record/2","record":{"id":"CVE-2026-77205","aliases":[],"summary":"Denial of Service via sending bogus X.509 certificates","details":"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.","categories":["Unclassified"],"product":"libreswan","vendor":"The Libreswan Project","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-77205","source_modified_at":"2026-10-16T15:31:54.457Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"libreswan","vendor":"The Libreswan Project","versions":[{"version":"5.3","status":"affected","lessThanOrEqual":"5.3.2","versionType":"semver"},{"version":"5.3.3","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":3.7,"severity":"Low","kev":{"listed":false},"epss":{"probability":0.00183,"percentile":0.07494,"score_date":"2026-10-23"},"published_at":"2026-10-13T21:28:03.390Z","modified_at":"2026-10-16T15:31:54.457Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-77205","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-16T15:31:54.457Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-77205","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://libreswan.org/security/CVE-2026-77205/CVE-2026-77205.txt","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://libreswan.org/security/CVE-2026-77205/","tags":["patch"]},{"source":"CVE List","url":"https://libreswan.org/security/CVE-2026-14957/CVE-2026-14957.txt","tags":["related"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-16T15:14:28.040688Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-16T15:31:54.457Z","content_hash":"d6470f29677c2c2777e47b1ee72ea5b9b032018262656455aad2aebe79a08073"}}