{"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":"2026-02-17T21:51:54.642522Z","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@1.6.20-2ubuntu0.1~esm3?arch=source&distro=esm-apps/xenial"},"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":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libpng16-16","binary_version":"1.6.20-2ubuntu0.1~esm3"},{"binary_name":"libpng16-dev","binary_version":"1.6.20-2ubuntu0.1~esm3"},{"binary_name":"libpng16-devtools","binary_version":"1.6.20-2ubuntu0.1~esm3"},{"binary_name":"libpng16-tools","binary_version":"1.6.20-2ubuntu0.1~esm3"}]},"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"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2025-66293"},{"severity":[{"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":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-22695"},{"severity":[{"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_V4"},{"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"}],"id":"CVE-2026-25646"}]},"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@1.6.34-1ubuntu0.18.04.2+esm2?arch=source&distro=esm-infra/bionic"},"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-dev","binary_version":"1.6.34-1ubuntu0.18.04.2+esm2"},{"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":[{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2025-66293"},{"severity":[{"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":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-22695"},{"severity":[{"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":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-22801"},{"severity":[{"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_V4"},{"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"}],"id":"CVE-2026-25646"}]},"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@1.6.37-2ubuntu0.1~esm2?arch=source&distro=esm-infra/focal"},"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_name":"libpng-dev","binary_version":"1.6.37-2ubuntu0.1~esm2"},{"binary_name":"libpng-tools","binary_version":"1.6.37-2ubuntu0.1~esm2"},{"binary_name":"libpng16-16","binary_version":"1.6.37-2ubuntu0.1~esm2"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:20.04: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"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2025-66293"},{"severity":[{"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":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-22695"},{"severity":[{"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":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-22801"},{"severity":[{"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_V4"},{"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"}],"id":"CVE-2026-25646"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8035-1.json"}}],"schema_version":"1.7.3"}