{"id":"USN-8251-1","summary":"libpng1.6 vulnerabilities","details":"It 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)","modified":"2026-05-08T13:44:34.419056061Z","published":"2026-05-07T13:37:49Z","related":["UBUNTU-CVE-2026-33416","UBUNTU-CVE-2026-33636","UBUNTU-CVE-2026-34757"],"upstream":["CVE-2026-33416","CVE-2026-33636","CVE-2026-34757","UBUNTU-CVE-2026-33416","UBUNTU-CVE-2026-33636","UBUNTU-CVE-2026-34757"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8251-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33416"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33636"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-34757"}],"affected":[{"package":{"name":"libpng1.6","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libpng1.6@1.6.37-3ubuntu0.5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.37-3ubuntu0.5"}]}],"versions":["1.6.37-3build4","1.6.37-3build5","1.6.37-3ubuntu0.1","1.6.37-3ubuntu0.3","1.6.37-3ubuntu0.4"],"ecosystem_specific":{"binaries":[{"binary_name":"libpng-tools","binary_version":"1.6.37-3ubuntu0.5"},{"binary_name":"libpng16-16","binary_version":"1.6.37-3ubuntu0.5"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8251-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-33416"},{"id":"CVE-2026-33636","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-34757","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:22.04:LTS"}}},{"package":{"name":"libpng1.6","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libpng1.6@1.6.43-5ubuntu0.6?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.43-5ubuntu0.6"}]}],"versions":["1.6.40-1","1.6.40-2","1.6.40-3","1.6.42-1","1.6.43-1","1.6.43-3","1.6.43-5build1","1.6.43-5ubuntu0.1","1.6.43-5ubuntu0.3","1.6.43-5ubuntu0.4","1.6.43-5ubuntu0.5"],"ecosystem_specific":{"binaries":[{"binary_name":"libpng-tools","binary_version":"1.6.43-5ubuntu0.6"},{"binary_name":"libpng16-16t64","binary_version":"1.6.43-5ubuntu0.6"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8251-1.json","cves_map":{"cves":[{"id":"CVE-2026-33416","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-33636","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-34757"}],"ecosystem":"Ubuntu:24.04:LTS"}}},{"package":{"name":"libpng1.6","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libpng1.6@1.6.50-1ubuntu0.5?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.50-1ubuntu0.5"}]}],"versions":["1.6.47-1.1","1.6.48-1","1.6.49-1~exp1","1.6.50-1~exp1","1.6.50-1","1.6.50-1ubuntu0.1","1.6.50-1ubuntu0.3","1.6.50-1ubuntu0.4"],"ecosystem_specific":{"binaries":[{"binary_name":"libpng-tools","binary_version":"1.6.50-1ubuntu0.5"},{"binary_name":"libpng16-16t64","binary_version":"1.6.50-1ubuntu0.5"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8251-1.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-33416"},{"id":"CVE-2026-33636","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-34757","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:25.10"}}}],"schema_version":"1.7.5"}