{"id":"CVE-2026-103678","summary":"Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value","details":"A flaw was found in tnef. An attacker can exploit this vulnerability by providing a specially crafted file containing uncompressed Rich Text Format (RTF) data. Because the application fails to properly validate input buffer boundaries before copying data in get_rtf_data_from_buf(), reading beyond the allocated memory occurs. This flaw can cause the application to crash, leading to a Denial of Service (DoS), or leak sensitive memory contents into extracted output files.","modified":"2026-10-03T03:46:35.320495679Z","published":"2026-10-01T11:34:48.652Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103678.json","cna_assigner":"fedora","cwe_ids":["CWE-125"]},"references":[{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-103678"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103678.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103678"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2544476"},{"type":"PACKAGE","url":"https://github.com/verdammelt/tnef"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/verdammelt/tnef","events":[{"introduced":"0"},{"last_affected":"8edd0e046736764c6decc8cd6e0e739438408f3e"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"last_affected":"1.4.18"}]}}],"versions":["1.4.18","1.4.17","1.4.16","1.4.15","1.4.14","1.4.12","TNEF-1.4.11","1.4.11","TNEF-1.4.10","1.4.10"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-103678.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L"}]}