{"id":"UBUNTU-CVE-2026-42146","details":"CImg Library is a C++ library for image processing. Prior to commit c3aacf5, the nb_colors field read from the BMP file header is used directly to compute an allocation size without validating it against the remaining file size. A crafted BMP file with a large nb_colors value triggers an out-of-memory condition, crashing any application that uses CImg to load untrusted BMP files. This issue has been patched via commit c3aacf5.","modified":"2026-05-20T16:25:43.545178035Z","published":"2026-05-04T18:16:00Z","upstream":["CVE-2026-42146"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42146"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-42146"},{"type":"REPORT","url":"https://github.com/GreycLab/CImg/security/advisories/GHSA-g54r-qmgx-c6fv"},{"type":"REPORT","url":"https://github.com/GreycLab/CImg/issues/477"}],"affected":[{"package":{"name":"cimg","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/cimg?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.4+dfsg-1build1","1.6.5+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.6.5+dfsg-1","binary_name":"cimg-examples"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42146.json"}},{"package":{"name":"cimg","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/cimg?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.9+dfsg-2","1.7.9+dfsg-2build1","1.7.9+dfsg-2ubuntu0.18.04.1","1.7.9+dfsg-2ubuntu0.18.04.2","1.7.9+dfsg-2ubuntu0.18.04.2+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.7.9+dfsg-2ubuntu0.18.04.2+esm1","binary_name":"cimg-examples"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42146.json"}},{"package":{"name":"cimg","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/cimg?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.5+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.4.5+dfsg-1","binary_name":"cimg-examples"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42146.json"}},{"package":{"name":"cimg","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/cimg?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.9.4+dfsg-2","2.9.4+dfsg-3","2.9.4+dfsg-3ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.9.4+dfsg-3ubuntu0.1~esm1","binary_name":"cimg-examples"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42146.json"}},{"package":{"name":"cimg","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/cimg?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.1+dfsg-1","3.2.1+dfsg-1ubuntu0.24.04.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"cimg-examples","binary_version":"3.2.1+dfsg-1ubuntu0.24.04.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42146.json"}},{"package":{"name":"cimg","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/cimg?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.2+dfsg-1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.5.2+dfsg-1","binary_name":"cimg-examples"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42146.json"}},{"package":{"name":"cimg","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/cimg?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.2+dfsg-1","3.5.2+dfsg-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"cimg-examples","binary_version":"3.5.2+dfsg-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42146.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}