{"id":"USN-8686-1","summary":"opencryptoki vulnerabilities","details":"It was discovered that primitive decoders in openCryptoki produced integer\nunderflows when the encoded length was zero. An attacker could possibly use\nthis issue to trigger out-of-bounds reads. (CVE-2026-40253)\n\nIt was discovered that openCryptoki incorrectly handled symlinks. An\nattacker in the token-group could possibly use this issue to achieve\nprivilege  escalation or access sensitive information. (CVE-2026-23893)","modified":"2026-08-31T17:26:25.682571558Z","published":"2026-08-27T14:43:29Z","related":["UBUNTU-CVE-2026-23893","UBUNTU-CVE-2026-40253"],"upstream":["CVE-2026-23893","CVE-2026-40253","UBUNTU-CVE-2026-23893","UBUNTU-CVE-2026-40253"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8686-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-23893"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-40253"}],"affected":[{"package":{"name":"opencryptoki","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/opencryptoki?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.17.0+dfsg+20220202.b40982e-0ubuntu1.3"}]}],"versions":["3.16.0+dfsg-0ubuntu1","3.16.0+dfsg-0ubuntu2","3.16.0+dfsg-0ubuntu3","3.17.0+dfsg+20220202.b40982e-0ubuntu1","3.17.0+dfsg+20220202.b40982e-0ubuntu1.1","3.17.0+dfsg+20220202.b40982e-0ubuntu1.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"3.17.0+dfsg+20220202.b40982e-0ubuntu1.3","binary_name":"libopencryptoki0"},{"binary_version":"3.17.0+dfsg+20220202.b40982e-0ubuntu1.3","binary_name":"opencryptoki"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2026-23893","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-40253"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8686-1.json"}},{"package":{"name":"opencryptoki","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/opencryptoki?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.23.0+dfsg-0ubuntu3.1"}]}],"versions":["3.21.0+dfsg-0ubuntu1","3.21.0+dfsg-0ubuntu2","3.22.0+dfsg-0ubuntu1","3.23.0+dfsg-0ubuntu1","3.23.0+dfsg-0ubuntu2","3.23.0+dfsg-0ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_name":"libopencryptoki0","binary_version":"3.23.0+dfsg-0ubuntu3.1"},{"binary_name":"opencryptoki","binary_version":"3.23.0+dfsg-0ubuntu3.1"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"id":"CVE-2026-23893","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-40253"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8686-1.json"}}],"schema_version":"1.9.0"}