{"id":"USN-8035-1","summary":"libpng1.6 vulnerabilities","details":"It was discovered that the libpng simplified API incorrectly processed\npalette PNG images with partial transparency and gamma correction. If a\nuser or automated system were tricked into opening a specially crafted PNG\nfile, an attacker could use this issue to cause libpng to crash, resulting\nin a denial of service. (CVE-2025-66293)\n\nPetr Simecek, Stanislav Fort and Pavel Kohout discovered that the libpng\nsimplified API incorrectly processed interlaced 16-bit PNGs with 8-bit\noutput format and non-minimal row strides. If a user or automated system\nwere tricked into opening a specially crafted PNG file, an attacker could\nuse this issue to cause libpng to crash, resulting in a denial of service.\n(CVE-2026-22695)\n\nCosmin Truta discovered that the libpng simplified API incorrectly handled\ninvalid row strides. If a user or automated system were tricked into\nopening a specially crafted PNG file, an attacker could use this issue to\ncause libpng to crash, resulting in a denial of service. This issue only\naffected Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2026-22801)\n\nIt was discovered that the libpng simplified API incorrectly handled\nquantizing RGB images. If a user or automated system were tricked into\nopening a specially crafted PNG file, an attacker could use this issue to\ncause libpng to crash, resulting in a denial of service. (CVE-2026-25646)","modified":"2026-09-11T15:00:34.059474388Z","published":"2026-02-12T13:37:00Z","related":["UBUNTU-CVE-2025-66293","UBUNTU-CVE-2026-22695","UBUNTU-CVE-2026-22801","UBUNTU-CVE-2026-25646"],"upstream":["CVE-2025-66293","CVE-2026-22695","CVE-2026-22801","CVE-2026-25646","UBUNTU-CVE-2025-66293","UBUNTU-CVE-2026-22695","UBUNTU-CVE-2026-22801","UBUNTU-CVE-2026-25646"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8035-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-66293"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-22695"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-22801"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-25646"}],"affected":[{"package":{"name":"libpng1.6","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/libpng1.6?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.20-2ubuntu0.1~esm3"}]}],"versions":["1.6.20-2","1.6.20-2ubuntu0.1~esm1","1.6.20-2ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"libpng16-16","binary_version":"1.6.20-2ubuntu0.1~esm3"},{"binary_version":"1.6.20-2ubuntu0.1~esm3","binary_name":"libpng16-devtools"},{"binary_name":"libpng16-tools","binary_version":"1.6.20-2ubuntu0.1~esm3"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2025-66293"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-22695"},{"id":"CVE-2026-25646","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8035-1.json"}},{"package":{"name":"libpng1.6","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/libpng1.6?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.34-1ubuntu0.18.04.2+esm2"}]}],"versions":["1.6.34-1","1.6.34-1ubuntu0.18.04.1","1.6.34-1ubuntu0.18.04.2","1.6.34-1ubuntu0.18.04.2+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"libpng-tools","binary_version":"1.6.34-1ubuntu0.18.04.2+esm2"},{"binary_name":"libpng16-16","binary_version":"1.6.34-1ubuntu0.18.04.2+esm2"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"id":"CVE-2025-66293","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-22695"},{"id":"CVE-2026-22801","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-25646","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N"},{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8035-1.json"}},{"package":{"name":"libpng1.6","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/libpng1.6?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.37-2ubuntu0.1~esm2"}]}],"versions":["1.6.37-1","1.6.37-2","1.6.37-2ubuntu0.1~esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_version":"1.6.37-2ubuntu0.1~esm2","binary_name":"libpng-tools"},{"binary_name":"libpng16-16","binary_version":"1.6.37-2ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8035-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"id":"CVE-2025-66293","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-22695","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-22801","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-25646","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"medium","type":"Ubuntu"}]}]}}}],"schema_version":"1.9.0"}