{"schemaVersion":3,"id":"USN-8251-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"libpng1.6 vulnerabilities\n\nIt was discovered that libpng incorrectly handled memory when processing\ncertain PNG files. If a user or automated system were tricked into opening\na specially crafted PNG file, an attacker could use this issue to cause\nlibpng to crash, resulting in a denial of service, or possibly execute\narbitrary code. (CVE-2026-33416)\n\nIt was discovered that libpng incorrectly handled expanding 8-bit paletted\nrows to RGB or RGBA on ARM processors. If a user or automated system were\ntricked into opening a specially crafted PNG file, an attacker could use\nthis issue to cause libpng to crash, resulting in a denial of service, or\npossibly execute arbitrary code. (CVE-2026-33636)\n\nIt was discovered that libpng incorrectly handled certain setter APIs. An\nattacker could possibly use this issue to obtain sensitive information.\n(CVE-2026-34757)","dates":{"published":"2026-05-07T13:37:49.000Z","modified":"2026-05-20T16:04:05.236Z","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":"libpng1.6","name":"libpng1.6","label":"libpng1.6","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libpng1.6","purlType":"deb","versions":[{"text":"< 1.6.37-3ubuntu0.5","noFixRecorded":false,"fixedIn":null},{"text":"< 1.6.43-5ubuntu0.6","noFixRecorded":false,"fixedIn":null},{"text":"< 1.6.50-1ubuntu0.5","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.6.37-3ubuntu0.5 | < 1.6.43-5ubuntu0.6 | < 1.6.50-1ubuntu0.5","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8251-1","label":"ubuntu.com/security/notices/USN-8251-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-33416","label":"ubuntu.com/security/CVE-2026-33416","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-33636","label":"ubuntu.com/security/CVE-2026-33636","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-34757","label":"ubuntu.com/security/CVE-2026-34757","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2026-33416","CVE-2026-33636","CVE-2026-34757"]},"timeline":[{"kind":"published","date":"2026-05-07T13:37:49.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-05-20T16:04:05.236Z","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":"2026-10-20T17:26:29.608Z","stale":false,"partial":false}}