{"id":"UBUNTU-CVE-2026-42476","details":"Two heap-based out-of-bounds read vulnerabilities in the STL ASCII file parser in Open CASCADE Technology (OCCT) V8_0_0_rc5 exist in RWStl_Reader::ReadAscii because buffers returned by Standard_ReadLineBuffer::ReadLine() are not properly length-validated before strncasecmp or direct byte access. User-assisted attackers can trigger these issues by persuading a victim to open a crafted STL file with extremely short lines, resulting in a denial of service or possible information disclosure.","modified":"2026-05-20T16:25:43.918410733Z","published":"2026-05-01T15:16:00Z","upstream":["CVE-2026-42476"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42476"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-42476"},{"type":"REPORT","url":"https://gist.github.com/sgInnora/dfba083d04906283e9c92aea78e2d94a"}],"affected":[{"package":{"name":"opencascade","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/opencascade?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.3.3+dfsg1-1","7.3.3+dfsg1-1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libocct-data-exchange-7.3","binary_version":"7.3.3+dfsg1-1build1"},{"binary_version":"7.3.3+dfsg1-1build1","binary_name":"libocct-draw-7.3"},{"binary_version":"7.3.3+dfsg1-1build1","binary_name":"libocct-foundation-7.3"},{"binary_name":"libocct-modeling-algorithms-7.3","binary_version":"7.3.3+dfsg1-1build1"},{"binary_version":"7.3.3+dfsg1-1build1","binary_name":"libocct-modeling-data-7.3"},{"binary_version":"7.3.3+dfsg1-1build1","binary_name":"libocct-ocaf-7.3"},{"binary_version":"7.3.3+dfsg1-1build1","binary_name":"libocct-visualization-7.3"},{"binary_name":"occt-draw","binary_version":"7.3.3+dfsg1-1build1"},{"binary_name":"occt-misc","binary_version":"7.3.3+dfsg1-1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42476.json"}},{"package":{"name":"opencascade","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/opencascade?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.5.1+dfsg1-2","7.5.1+dfsg1-2ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"libocct-data-exchange-7.5","binary_version":"7.5.1+dfsg1-2ubuntu1"},{"binary_version":"7.5.1+dfsg1-2ubuntu1","binary_name":"libocct-draw-7.5"},{"binary_name":"libocct-foundation-7.5","binary_version":"7.5.1+dfsg1-2ubuntu1"},{"binary_name":"libocct-modeling-algorithms-7.5","binary_version":"7.5.1+dfsg1-2ubuntu1"},{"binary_name":"libocct-modeling-data-7.5","binary_version":"7.5.1+dfsg1-2ubuntu1"},{"binary_name":"libocct-ocaf-7.5","binary_version":"7.5.1+dfsg1-2ubuntu1"},{"binary_name":"libocct-visualization-7.5","binary_version":"7.5.1+dfsg1-2ubuntu1"},{"binary_name":"occt-draw","binary_version":"7.5.1+dfsg1-2ubuntu1"},{"binary_name":"occt-misc","binary_version":"7.5.1+dfsg1-2ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42476.json"}},{"package":{"name":"opencascade","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/opencascade?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.6.3+dfsg1-7","7.6.3+dfsg1-7.1","7.6.3+dfsg1-7.1build1"],"ecosystem_specific":{"binaries":[{"binary_name":"libocct-data-exchange-7.6t64","binary_version":"7.6.3+dfsg1-7.1build1"},{"binary_name":"libocct-draw-7.6t64","binary_version":"7.6.3+dfsg1-7.1build1"},{"binary_name":"libocct-foundation-7.6t64","binary_version":"7.6.3+dfsg1-7.1build1"},{"binary_name":"libocct-modeling-algorithms-7.6t64","binary_version":"7.6.3+dfsg1-7.1build1"},{"binary_name":"libocct-modeling-data-7.6t64","binary_version":"7.6.3+dfsg1-7.1build1"},{"binary_version":"7.6.3+dfsg1-7.1build1","binary_name":"libocct-ocaf-7.6t64"},{"binary_name":"libocct-visualization-7.6t64","binary_version":"7.6.3+dfsg1-7.1build1"},{"binary_name":"occt-draw","binary_version":"7.6.3+dfsg1-7.1build1"},{"binary_name":"occt-misc","binary_version":"7.6.3+dfsg1-7.1build1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42476.json"}},{"package":{"name":"opencascade","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/opencascade?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.8.1+dfsg1-3"],"ecosystem_specific":{"binaries":[{"binary_version":"7.8.1+dfsg1-3","binary_name":"libocct-data-exchange-7.8"},{"binary_name":"libocct-draw-7.8","binary_version":"7.8.1+dfsg1-3"},{"binary_name":"libocct-foundation-7.8","binary_version":"7.8.1+dfsg1-3"},{"binary_version":"7.8.1+dfsg1-3","binary_name":"libocct-modeling-algorithms-7.8"},{"binary_name":"libocct-modeling-data-7.8","binary_version":"7.8.1+dfsg1-3"},{"binary_name":"libocct-ocaf-7.8","binary_version":"7.8.1+dfsg1-3"},{"binary_name":"libocct-visualization-7.8","binary_version":"7.8.1+dfsg1-3"},{"binary_version":"7.8.1+dfsg1-3","binary_name":"occt-draw"},{"binary_name":"occt-misc","binary_version":"7.8.1+dfsg1-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42476.json"}},{"package":{"name":"opencascade","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/opencascade?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"intro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