{"schemaVersion":3,"id":"USN-8155-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"openssl, openssl1.0 vulnerabilities\n\nUSN-8155-1 fixed vulnerabilities in OpenSSL. This update provides the\ncorresponding updates for CVE-2026-28387 for openssl in Ubuntu 20.04 LTS.\nCVE-2026-28388 for openssl and openssl1.0 in Ubuntu 14.04 LTS, Ubuntu 16.04\nLTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS, and CVE-2026-28389 and\nCVE-2026-28390 for openssl and openssl1.0 for Ubuntu 16.04 LTS, Ubuntu\n18.04 LTS, and Ubuntu 20.04 LTS.\n\nOriginal advisory details:\n\n Viktor Dukhovni discovered that OpenSSL incorrectly negotiated the\n expected preferred key exchange group when used as a TLS 1.3 server. This\n could result in a less preferred key exchange being used, contrary to\n expectations. This issue only affected Ubuntu 25.10. (CVE-2026-2673)\n\n Igor Morgenstern discovered that OpenSSL incorrectly handled certain\n memory operations when used as a DANE client. A remote attacker could use\n this issue to cause OpenSSL to crash, resulting in a denial of service, or\n possibly execute arbitrary code. (CVE-2026-28387)\n\n Igor Morgenstern discovered that OpenSSL incorrectly handled certain\n memory operations when processing a delta CRL. A remote attacker could\n possibly use this issue to cause OpenSSL to crash, resulting in a denial\n of service. (CVE-2026-28388)\n\n Nathan Sportsman, Daniel Rhea, and Jaeho Nam discovered that OpenSSL\n incorrectly handled certain memory operations when processing a crafted\n CMS EnvelopedData message with KeyAgreeRecipientInfo. A remote attacker\n could possibly use this issue to cause OpenSSL to crash, resulting in a\n denial of service. (CVE-2026-28389)\n\n Muhammad Daffa, Joshua Rogers, and Chanho Kim discovered that OpenSSL\n incorrectly handled processing of a crafted CMS EnvelopedData message with\n KeyTransportRecipientInfo. A remote attacker could possibly use this issue\n to cause OpenSSL to crash, resulting in a denial of service.\n (CVE-2026-28390)\n\n Quoc Tran discovered that OpenSSL incorrectly handled hexadecimal\n conversion on 32-bit platforms. A remote attacker could use this issue to\n cause OpenSSL to crash, resulting in a denial of service, or possibly\n execute arbitrary code. (CVE-2026-31789)\n\n Simo Sorce discovered that OpenSSL incorrectly handled failures in RSA KEM\n RSASVE Encapsulation. A remote attacker could possibly use this issue to\n obtain sensitive information. (CVE-2026-31790)","dates":{"published":"2026-04-09T17:35:21.000Z","modified":"2026-06-25T13:32:31.942Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"openssl","name":"openssl","label":"openssl","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/openssl","purlType":"deb","versions":[{"text":"< 1.0.1f-1ubuntu2.27+esm13","noFixRecorded":false,"fixedIn":null},{"text":"< 1.0.2g-1ubuntu4.20+esm15","noFixRecorded":false,"fixedIn":null},{"text":"< 1.1.1-1ubuntu2.1~18.04.23+esm8","noFixRecorded":false,"fixedIn":null},{"text":"< 1.1.1f-1ubuntu2.24+esm3","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.0.1f-1ubuntu2.27+esm13 | < 1.0.2g-1ubuntu4.20+esm15 | < 1.1.1-1ubuntu2.1~18.04.23+esm8 | < 1.1.1f-1ubuntu2.24+esm3","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"openssl1.0","name":"openssl1.0","label":"openssl1.0","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/openssl1.0","purlType":"deb","versions":[{"text":"< 1.0.2n-1ubuntu5.13+esm4","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.0.2n-1ubuntu5.13+esm4","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8155-2","label":"ubuntu.com/security/notices/USN-8155-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-28387","label":"ubuntu.com/security/CVE-2026-28387","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-28388","label":"ubuntu.com/security/CVE-2026-28388","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-28389","label":"ubuntu.com/security/CVE-2026-28389","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-28390","label":"ubuntu.com/security/CVE-2026-28390","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2026-28387","CVE-2026-28388","CVE-2026-28389","CVE-2026-28390"]},"timeline":[{"kind":"published","date":"2026-04-09T17:35:21.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-25T13:32:31.942Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T10:16:52.449Z","stale":false,"partial":false}}