{"id":"UBUNTU-CVE-2025-64503","details":"cups-filters contains backends, filters, and other software required to get the cups printing service working on operating systems other than macos. In cups-filters prior to 1.28.18, by crafting a PDF file with a large `MediaBox` value, an attacker can cause CUPS-Filter 1.x’s `pdftoraster` tool to write beyond the bounds of an array. First, a PDF with a large `MediaBox` width value causes `header.cupsWidth` to become large.  Next, the calculation of `bytesPerLine = (header.cupsBitsPerPixel * header.cupsWidth + 7) / 8` overflows, resulting in a small value. Then, `lineBuf` is allocated with the small `bytesPerLine` size. Finally, `convertLineChunked` calls `writePixel8`, which attempts to write to `lineBuf` outside of its buffer size (out of bounds write). In libcupsfilters, the maintainers found the same `bytesPerLine` multiplication without overflow check, but the provided test case does not cause an overflow there, because the values are different. Commit 50d94ca0f2fa6177613c97c59791bde568631865 contains a patch, which is incorporated into cups-filters version 1.28.18.","modified":"2026-04-22T20:00:19.972192Z","published":"2025-11-12T00:00:00Z","related":["USN-7877-1","USN-7878-1"],"upstream":["CVE-2025-64503"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-64503"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-64503"},{"type":"REPORT","url":"https://www.openwall.com/lists/oss-security/2025/11/12/2"},{"type":"REPORT","url":"https://github.com/OpenPrinting/cups-filters/security/advisories/GHSA-893j-2wr2-wrh9"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7877-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7878-1"}],"affected":[{"package":{"name":"cups-filters","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/cups-filters@1.8.3-2ubuntu3.5+esm3?arch=source&distro=esm-infra/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.3-2ubuntu3.5+esm3"}]}],"versions":["1.0.76-1","1.1.0-1","1.1.0-1build1","1.3.0-1","1.4.0-1","1.5.0-1","1.6.0-1","1.7.0-1","1.8.1-1","1.8.2-1","1.8.2-2","1.8.2-2ubuntu2","1.8.2-2ubuntu3","1.8.3-2ubuntu1","1.8.3-2ubuntu2","1.8.3-2ubuntu3","1.8.3-2ubuntu3.1","1.8.3-2ubuntu3.4","1.8.3-2ubuntu3.5","1.8.3-2ubuntu3.5+esm1","1.8.3-2ubuntu3.5+esm2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"cups-browsed","binary_version":"1.8.3-2ubuntu3.5+esm3"},{"binary_name":"cups-filters","binary_version":"1.8.3-2ubuntu3.5+esm3"},{"binary_name":"cups-filters-core-drivers","binary_version":"1.8.3-2ubuntu3.5+esm3"},{"binary_name":"libcupsfilters1","binary_version":"1.8.3-2ubuntu3.5+esm3"},{"binary_name":"libfontembed1","binary_version":"1.8.3-2ubuntu3.5+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64503.json"}},{"package":{"name":"cups-filters","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/cups-filters@1.20.2-0ubuntu3.3+esm2?arch=source&distro=esm-infra/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.20.2-0ubuntu3.3+esm2"}]}],"versions":["1.17.9-0ubuntu1","1.17.9-1","1.20.0-2","1.20.1-1","1.20.1-1build1","1.20.2-0ubuntu1","1.20.2-0ubuntu2","1.20.2-0ubuntu3","1.20.2-0ubuntu3.1","1.20.2-0ubuntu3.3","1.20.2-0ubuntu3.3+esm1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"cups-browsed","binary_version":"1.20.2-0ubuntu3.3+esm2"},{"binary_name":"cups-filters","binary_version":"1.20.2-0ubuntu3.3+esm2"},{"binary_name":"cups-filters-core-drivers","binary_version":"1.20.2-0ubuntu3.3+esm2"},{"binary_name":"libcupsfilters1","binary_version":"1.20.2-0ubuntu3.3+esm2"},{"binary_name":"libfontembed1","binary_version":"1.20.2-0ubuntu3.3+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64503.json"}},{"package":{"name":"cups-filters","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/cups-filters@1.27.4-1ubuntu0.4+esm1?arch=source&distro=esm-infra/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.27.4-1ubuntu0.4+esm1"}]}],"versions":["1.25.11-0ubuntu1","1.25.11-1","1.25.12-1","1.25.13-1","1.26.0-1","1.26.1-1","1.26.2-1","1.27.0-1","1.27.0-2","1.27.1-1","1.27.1-2","1.27.1-3","1.27.2-1","1.27.3-1","1.27.4-1","1.27.4-1ubuntu0.2","1.27.4-1ubuntu0.3","1.27.4-1ubuntu0.4"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"cups-browsed","binary_version":"1.27.4-1ubuntu0.4+esm1"},{"binary_name":"cups-filters","binary_version":"1.27.4-1ubuntu0.4+esm1"},{"binary_name":"cups-filters-core-drivers","binary_version":"1.27.4-1ubuntu0.4+esm1"},{"binary_name":"libcupsfilters1","binary_version":"1.27.4-1ubuntu0.4+esm1"},{"binary_name":"libfontembed1","binary_version":"1.27.4-1ubuntu0.4+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64503.json"}},{"package":{"name":"cups-filters","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/cups-filters@1.28.15-0ubuntu1.5?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28.15-0ubuntu1.5"}]}],"versions":["1.28.10-2","1.28.11-1","1.28.11-2","1.28.12-1","1.28.13-0ubuntu1","1.28.14-1","1.28.15-0ubuntu1","1.28.15-0ubuntu1.2","1.28.15-0ubuntu1.3","1.28.15-0ubuntu1.4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"cups-browsed","binary_version":"1.28.15-0ubuntu1.5"},{"binary_name":"cups-filters","binary_version":"1.28.15-0ubuntu1.5"},{"binary_name":"cups-filters-core-drivers","binary_version":"1.28.15-0ubuntu1.5"},{"binary_version":"1.28.15-0ubuntu1.5","binary_name":"libcupsfilters1"},{"binary_name":"libfontembed1","binary_version":"1.28.15-0ubuntu1.5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64503.json"}},{"package":{"name":"libcupsfilters","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libcupsfilters@2.0.0-0ubuntu7.2?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.0-0ubuntu7.2"}]}],"versions":["2.0.0-0ubuntu1","2.0.0-0ubuntu6","2.0.0-0ubuntu7","2.0.0-0ubuntu7.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libcupsfilters-tests","binary_version":"2.0.0-0ubuntu7.2"},{"binary_name":"libcupsfilters2-common","binary_version":"2.0.0-0ubuntu7.2"},{"binary_name":"libcupsfilters2t64","binary_version":"2.0.0-0ubuntu7.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64503.json"}},{"package":{"name":"libcupsfilters","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libcupsfilters@2.1.1-0ubuntu3.1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.1-0ubuntu3.1"}]}],"versions":["2.1.1-0ubuntu2","2.1.1-0ubuntu3"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libcupsfilters-tests","binary_version":"2.1.1-0ubuntu3.1"},{"binary_name":"libcupsfilters2-common","binary_version":"2.1.1-0ubuntu3.1"},{"binary_name":"libcupsfilters2t64","binary_version":"2.1.1-0ubuntu3.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-64503.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}