{"id":"UBUNTU-CVE-2026-43907","details":"OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, a signed integer overflow in QueryRGBBufferSizeInternal() in DPXColorConverter.cpp leads to a heap-based out-of-bounds write when processing crafted DPX image files. The function computes buffer sizes using 32-bit signed integer arithmetic with negative multipliers (e.g., pixels * -3 * bytes for kCbYCr descriptors and pixels * -4 * bytes for kABGR descriptors), where a negative result is used as an in-band signal that no separate buffer is needed. When the pixel count is sufficiently large, the multiplication overflows INT_MIN and wraps to a small positive value. The caller in dpxinput.cpp interprets this positive value as a required buffer size, allocates an undersized heap buffer via m_decodebuf.resize(), and then writes the full image data into it via fread, resulting in a heap buffer overflow. An attacker can exploit this by crafting a DPX file that triggers the overflow, causing a denial of service (crash) or potentially arbitrary code execution through heap corruption in any application that reads pixel data using OpenImageIO. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.","modified":"2026-06-16T21:45:33.326246942Z","published":"2026-05-14T20:17:00Z","upstream":["CVE-2026-43907"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43907"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-43907"},{"type":"REPORT","url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-cq46-hp4h-cvfr"}],"affected":[{"package":{"name":"openimageio","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/openimageio?arch=source&distro=esm-apps-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.11~dfsg0-1ubuntu1+esm2"}]}],"versions":["1.5.17~dfsg0-1ubuntu2","1.5.20~dfsg0-1ubuntu2","1.5.23~dfsg0-1ubuntu1","1.6.9~dfsg0-4ubuntu1","1.6.10~dfsg0-1ubuntu1","1.6.10~dfsg0-2ubuntu1","1.6.11~dfsg0-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"libopenimageio1.6","binary_version":"1.6.11~dfsg0-1ubuntu1+esm2"},{"binary_name":"openimageio-tools","binary_version":"1.6.11~dfsg0-1ubuntu1+esm2"},{"binary_name":"python-openimageio","binary_version":"1.6.11~dfsg0-1ubuntu1+esm2"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43907.json"}},{"package":{"name":"openimageio","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/openimageio?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.7.17~dfsg0-1ubuntu2+esm1"}]}],"versions":["1.6.17~dfsg0-1ubuntu5","1.7.17~dfsg0-1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libopenimageio1.7","binary_version":"1.7.17~dfsg0-1ubuntu2+esm1"},{"binary_name":"openimageio-tools","binary_version":"1.7.17~dfsg0-1ubuntu2+esm1"},{"binary_version":"1.7.17~dfsg0-1ubuntu2+esm1","binary_name":"python-openimageio"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43907.json"}},{"package":{"name":"openimageio","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/openimageio?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.12.0~dfsg0-1ubuntu0.1~esm1"}]}],"versions":["2.0.10~dfsg0-1","2.0.11~dfsg0-1","2.0.12~dfsg0-1","2.0.12~dfsg0-1build1","2.0.12~dfsg0-1build2","2.1.10.1~dfsg0-5ubuntu4","2.1.10.1~dfsg0-5ubuntu5","2.1.12.0~dfsg0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.1.12.0~dfsg0-1ubuntu0.1~esm1","binary_name":"libopenimageio2.1"},{"binary_name":"openimageio-tools","binary_version":"2.1.12.0~dfsg0-1ubuntu0.1~esm1"},{"binary_version":"2.1.12.0~dfsg0-1ubuntu0.1~esm1","binary_name":"python3-openimageio"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43907.json"}},{"package":{"name":"openimageio","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/openimageio?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.10.1+dfsg-1build1","2.2.18.0+dfsg-1","2.2.18.0+dfsg-1build2","2.2.18.0+dfsg-1ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"libopenimageio2.2","binary_version":"2.2.18.0+dfsg-1ubuntu2"},{"binary_name":"openimageio-tools","binary_version":"2.2.18.0+dfsg-1ubuntu2"},{"binary_version":"2.2.18.0+dfsg-1ubuntu2","binary_name":"python3-openimageio"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43907.json"}},{"package":{"name":"openimageio","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/openimageio?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.17.0+dfsg-1.1ubuntu0.1~esm1"}]}],"versions":["2.4.14.0+dfsg-1","2.4.16.0+dfsg-1","2.4.16.0+dfsg-1build1","2.4.17.0+dfsg-1","2.4.17.0+dfsg-1build1","2.4.17.0+dfsg-1.1build3","2.4.17.0+dfsg-1.1build4"],"ecosystem_specific":{"binaries":[{"binary_name":"libopenimageio2.4t64","binary_version":"2.4.17.0+dfsg-1.1ubuntu0.1~esm1"},{"binary_name":"openimageio-tools","binary_version":"2.4.17.0+dfsg-1.1ubuntu0.1~esm1"},{"binary_version":"2.4.17.0+dfsg-1.1ubuntu0.1~esm1","binary_name":"python3-openimageio"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43907.json"}},{"package":{"name":"openimageio","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/openimageio?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.5.18.0+dfsg-1build1","2.5.18.0+dfsg-1build2"],"ecosystem_specific":{"binaries":[{"binary_name":"libopenimageio2.5","binary_version":"2.5.18.0+dfsg-1build2"},{"binary_name":"openimageio-tools","binary_version":"2.5.18.0+dfsg-1build2"},{"binary_name":"python3-openimageio","binary_version":"2.5.18.0+dfsg-1build2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43907.json"}},{"package":{"name":"openimageio","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/openimageio?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.5.19.1+dfsg-2ubuntu0.1~esm1"}]}],"versions":["2.5.18.0+dfsg-1build2","2.5.19.1+dfsg-1build1","2.5.19.1+dfsg-1build3","2.5.19.1+dfsg-1build5","2.5.19.1+dfsg-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"libopenimageio2.5","binary_version":"2.5.19.1+dfsg-2ubuntu0.1~esm1"},{"binary_name":"openimageio-tools","binary_version":"2.5.19.1+dfsg-2ubuntu0.1~esm1"},{"binary_version":"2.5.19.1+dfsg-2ubuntu0.1~esm1","binary_name":"python3-openimageio"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43907.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}