{"id":"CVE-2023-40550","summary":"Shim: out-of-bound read in verify_buffer_sbat()","details":"An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.","modified":"2026-08-12T03:51:29.688324912Z","published":"2024-01-29T16:29:23.050Z","related":["ALSA-2024:1902","ALSA-2024:1903","SUSE-SU-2024:1368-1","SUSE-SU-2024:1461-1","SUSE-SU-2024:1462-1","SUSE-SU-2025:20136-1"],"database_specific":{"cna_assigner":"redhat","cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40550.json"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/05/msg00009.html"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1834"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1835"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1873"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1876"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1883"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1902"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1903"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:1959"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2024:2086"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2023-40550"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/40xxx/CVE-2023-40550.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-40550"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2259915"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rhboot/shim","events":[{"introduced":"0"},{"fixed":"5914984a1ffeab841f482c791426d7ca9935a5e6"}],"database_specific":{"source":"CPE_RANGE","cpe":"cpe:2.3:a:redhat:shim:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"15.8"}]}}],"versions":["15.7","15.6","15.6-rc2","15.5","15.5-rc2","15.4","15.3","shim-15.3-rc4","shim-15.3-rc3","shim-15.3-rc2","shim-15.3-rc1","15.2","15","14","13","12","11","0.9","0.8","0.7","0.5","0.4","0.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-40550.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N"}]}