{"id":"UBUNTU-CVE-2026-40393","details":"In Mesa before 25.3.6 and 26 before 26.0.1, out-of-bounds memory access can occur in WebGPU because the amount of to-be-allocated data depends on an untrusted party, and is then used for alloca.","modified":"2026-06-15T16:00:06.387271419Z","published":"2026-04-12T19:16:00Z","related":["USN-8427-1"],"upstream":["CVE-2026-40393"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-40393"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-40393"},{"type":"REPORT","url":"https://lists.freedesktop.org/archives/mesa-dev/2026-February/226597.html"},{"type":"REPORT","url":"https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39866"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8427-1"}],"affected":[{"package":{"name":"mesa","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/mesa?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.2.1-1ubuntu3","9.2.2-1ubuntu1","9.2.2-1ubuntu2","10.0.0-1ubuntu2","10.0.0-1ubuntu3","10.0.0-1ubuntu4","10.0.1-1ubuntu2","10.1.0~rc1-1ubuntu1","10.1.0~rc1-1ubuntu3","10.1.0~rc1-1ubuntu4","10.1.0~rc3-0ubuntu1","10.1.0~rc3-0ubuntu2","10.1.0~rc3-0ubuntu3","10.1.0-1ubuntu1","10.1.0-4ubuntu1","10.1.0-4ubuntu2","10.1.0-4ubuntu4","10.1.0-4ubuntu5","10.1.3-0ubuntu0.1","10.1.3-0ubuntu0.2","10.1.3-0ubuntu0.3","10.1.3-0ubuntu0.4","10.1.3-0ubuntu0.5","10.1.3-0ubuntu0.6"],"ecosystem_specific":{"binaries":[{"binary_name":"libegl1-mesa","binary_version":"10.1.3-0ubuntu0.6"},{"binary_name":"libegl1-mesa-drivers","binary_version":"10.1.3-0ubuntu0.6"},{"binary_name":"libgbm1","binary_version":"10.1.3-0ubuntu0.6"},{"binary_name":"libgl1-mesa-dri","binary_version":"10.1.3-0ubuntu0.6"},{"binary_version":"10.1.3-0ubuntu0.6","binary_name":"libgl1-mesa-glx"},{"binary_version":"10.1.3-0ubuntu0.6","binary_name":"libglapi-mesa"},{"binary_name":"libgles1-mesa","binary_version":"10.1.3-0ubuntu0.6"},{"binary_name":"libgles2-mesa","binary_version":"10.1.3-0ubuntu0.6"},{"binary_name":"libopenvg1-mesa","binary_version":"10.1.3-0ubuntu0.6"},{"binary_name":"libosmesa6","binary_version":"10.1.3-0ubuntu0.6"},{"binary_version":"10.1.3-0ubuntu0.6","binary_name":"libwayland-egl1-mesa"},{"binary_name":"libxatracker2","binary_version":"10.1.3-0ubuntu0.6"},{"binary_name":"mesa-vdpau-drivers","binary_version":"10.1.3-0ubuntu0.6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40393.json"}},{"package":{"name":"mesa","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mesa?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["11.0.2-1ubuntu4","11.0.4-1ubuntu1","11.0.5-1ubuntu1","11.0.5-1ubuntu2","11.0.6-1ubuntu1","11.0.7-1ubuntu1","11.0.8-1ubuntu1","11.1.1-1ubuntu2","11.1.2-1ubuntu1","11.1.2-1ubuntu2","11.2.0-1ubuntu1","11.2.0-1ubuntu2","11.2.0-1ubuntu2.1","11.2.0-1ubuntu2.2","12.0.6-0ubuntu0.16.04.1","17.0.7-0ubuntu0.16.04.1","17.0.7-0ubuntu0.16.04.2","17.2.4-0ubuntu1~16.04.2","17.2.4-0ubuntu1~16.04.4","17.2.8-0ubuntu0~16.04.1","18.0.5-0ubuntu0~16.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libegl1-mesa","binary_version":"18.0.5-0ubuntu0~16.04.1"},{"binary_version":"18.0.5-0ubuntu0~16.04.1","binary_name":"libgbm1"},{"binary_version":"18.0.5-0ubuntu0~16.04.1","binary_name":"libgl1-mesa-dri"},{"binary_name":"libgl1-mesa-glx","binary_version":"18.0.5-0ubuntu0~16.04.1"},{"binary_name":"libglapi-mesa","binary_version":"18.0.5-0ubuntu0~16.04.1"},{"binary_name":"libgles1-mesa","binary_version":"18.0.5-0ubuntu0~16.04.1"},{"binary_version":"18.0.5-0ubuntu0~16.04.1","binary_name":"libgles2-mesa"},{"binary_version":"18.0.5-0ubuntu0~16.04.1","binary_name":"libosmesa6"},{"binary_version":"18.0.5-0ubuntu0~16.04.1","binary_name":"libwayland-egl1-mesa"},{"binary_version":"18.0.5-0ubuntu0~16.04.1","binary_name":"libxatracker2"},{"binary_version":"18.0.5-0ubuntu0~16.04.1","binary_name":"mesa-opencl-icd"},{"binary_name":"mesa-va-drivers","binary_version":"18.0.5-0ubuntu0~16.04.1"},{"binary_name":"mesa-vdpau-drivers","binary_version":"18.0.5-0ubuntu0~16.04.1"},{"binary_version":"18.0.5-0ubuntu0~16.04.1","binary_name":"mesa-vulkan-drivers"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-40393.json"}},{"package":{"name":"mesa","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mesa?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["17.2.2-0ubuntu1","17.2.4-0ubuntu2","17.3.3-0ubuntu1","18.0.0~rc4-1ubuntu3","18.0.0~rc5-1ubuntu1","18.0.5-0ubuntu0~18.04.1","18.2.2-0ubuntu1~18.04.1","18.2.2-0ubuntu1~18.04.2","18.2.8-0ubuntu0~18.04.2","19.0.2-1ubuntu1.1~18.04.1","19.0.2-1ubuntu1.1~18.04.2","19.0.8-0ubuntu0~18.04.1","19.0.8-0ubuntu0~18.04.2","19.0.8-0ubuntu0~18.04.3","19.2.1-1ubuntu1~18.04.1","19.2.8-0ubuntu0~18.04.1","19.2.8-0ubuntu0~18.04.2","19.2.8-0ubuntu0~18.04.3","20.0.8-0ubuntu1~18.04.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libd3dadapter9-mesa","binary_version":"20.0.8-0ubuntu1~18.04.1"},{"binary_version":"20.0.8-0ubuntu1~18.04.1","binar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