{"schemaVersion":3,"id":"USN-7924-1","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, which could result in an out-of-bounds memory access.\nIf a user or automated system were tricked into opening a specially\ncrafted PNG file, an attacker could use this issue to cause libpng to\ncrash, resulting in a denial of service. (CVE-2025-64505)\n\nIt was discovered that libpng incorrectly handled memory when processing\n8-bit images through the simplified write API with 'convert_to_8bit'\nenabled, which could result in an out-of-bounds memory access. If a user\nor automated system were tricked into opening a specially crafted 8-bit\nPNG file, an attacker could use this issue to cause libpng to crash,\nresulting in a denial of service. (CVE-2025-64506)\n\nIt was discovered that libpng incorrectly handled memory when processing\npalette images with 'PNG_FLAG_OPTIMIZE_ALPHA' enabled, which could result\nin an out-of-bounds memory access. 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.\n(CVE-2025-64720)\n\nIt was discovered that libpng incorrectly handled memory when processing\n6-bit interlaced PNGs with 8-bit output format, which could result in an\nout-of-bounds memory access. If a user or automated system were tricked\ninto opening a specially crafted PNG file, an attacker could use this\nissue to cause libpng to crash, resulting in a denial of service.\n(CVE-2025-65018)","dates":{"published":"2025-12-11T05:26:40.000Z","modified":"2026-06-25T13:32:31.396Z","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":"< 1.6.20-2ubuntu0.1~esm2","noFixRecorded":false,"fixedIn":null},{"text":"< 1.6.34-1ubuntu0.18.04.2+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 1.6.37-2ubuntu0.1~esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 1.6.37-3ubuntu0.1","noFixRecorded":false,"fixedIn":null},{"text":"< 1.6.43-5ubuntu0.1","noFixRecorded":false,"fixedIn":null},{"text":"< 1.6.50-1ubuntu0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.6.20-2ubuntu0.1~esm2 | < 1.6.34-1ubuntu0.18.04.2+esm1 | < 1.6.37-2ubuntu0.1~esm1 | < 1.6.37-3ubuntu0.1 | < 1.6.43-5ubuntu0.1 | < 1.6.50-1ubuntu0.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-7924-1","label":"ubuntu.com/security/notices/USN-7924-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-64505","label":"ubuntu.com/security/CVE-2025-64505","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-64506","label":"ubuntu.com/security/CVE-2025-64506","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-64720","label":"ubuntu.com/security/CVE-2025-64720","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-65018","label":"ubuntu.com/security/CVE-2025-65018","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2025-64505","CVE-2025-64506","CVE-2025-64720","CVE-2025-65018"]},"timeline":[{"kind":"published","date":"2025-12-11T05:26:40.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-25T13:32:31.396Z","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":"2026-10-20T06:25:17.133Z","stale":false,"partial":false}}