{"id":"CVE-2026-103678","aliases":["DEBIAN-CVE-2026-103678","EUVD-2026-90771","GHSA-8r4j-263j-fh85","UBUNTU-CVE-2026-103678"],"status":"published","title":"Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value","description":"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.","severity":{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00235,"percentile":0.14652,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2026-10-01T11:34:48Z","modified":"2026-10-28T02:30:51Z","affected":[{"source":"osv","ecosystem":"Debian:12","package":"tnef","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.18-3","1.4.18-4","1.4.18-5","1.4.18-6"]},{"source":"osv","ecosystem":"Debian:13","package":"tnef","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.18-4","1.4.18-5","1.4.18-6"]},{"source":"osv","ecosystem":"Debian:14","package":"tnef","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.18-4","1.4.18-5","1.4.18-6"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"tnef","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.9-1","1.4.9-1+deb8u2build0.16.04.1","1.4.9-1+deb8u3build0.16.04.1","1.4.9-1+deb8u4build0.16.04.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"tnef","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.12-1.2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"tnef","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.12-1.2","1.4.18-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"tnef","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.18-3"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"tnef","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.18-3"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"tnef","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.18-5build1","1.4.18-6"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"tnef","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.18-5","1.4.18-5build1"]}],"products":[{"vendor":"tnef_project","product":"tnef"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-103678","tags":["vdb-entry","x_refsource_REDHAT","Third Party Advisory","advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2544476","tags":["issue-tracking","x_refsource_REDHAT","Issue Tracking","Third Party Advisory","report"]},{"url":"https://github.com/verdammelt/tnef","tags":["Product","package","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-103678","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-8r4j-263j-fh85"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103678.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-103678","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-103678","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-103678","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-103678","title":"Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value","description":"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.","status":"published","published":"2026-10-01T11:34:48.652Z","modified":"2026-10-01T15:00:19.812Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T13:34:48.658051Z"}],"euvd":[{"id":"EUVD-2026-90771","description":"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.","status":"published","published":"2026-10-01T11:34:48Z","modified":"2026-10-01T15:00:19Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T17:27:45.695512Z"}],"ghsa":[{"id":"GHSA-8r4j-263j-fh85","title":"A flaw was found in tnef. An attacker can exploit this vulnerability by providing a specially...","description":"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.","status":"published","published":"2026-10-01T12:31:20Z","modified":"2026-10-01T12:31:28Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:12:40.571849Z"}],"nvd":[{"id":"CVE-2026-103678","description":"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.","status":"published","published":"2026-10-01T12:17:15.557Z","modified":"2026-10-05T14:25:05.183Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:53.41762Z"}],"osv":[{"id":"CVE-2026-103678","title":"Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value","description":"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.","status":"published","published":"2026-10-01T11:34:48.652Z","modified":"2026-10-28T02:30:51.591438632Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"medium"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:44:54.236592Z"},{"id":"DEBIAN-CVE-2026-103678","description":"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.","status":"published","published":"2026-10-01T12:17:15.557Z","modified":"2026-10-06T10:00:15.360288501Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:48.903138Z"},{"id":"UBUNTU-CVE-2026-103678","description":"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.","status":"published","published":"2026-10-01T12:17:00Z","modified":"2026-10-17T12:57:59.428624773Z","cvss":[{"version":"3.1","score":5.4,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"medium"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T16:55:59.130573Z"}]}}