{"id":"CVE-2026-103678","state":"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.","publishedAt":"2026-10-01T11:34:48.652Z","updatedAt":"2026-10-01T15:00:19.812Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","source":"fedora"},"assigner":"fedora","products":["tnef"],"affected":[{"packageName":"tnef","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.4.18","versionType":"semver"}],"collectionURL":"https://github.com/verdammelt/tnef"}],"references":["https://access.redhat.com/security/cve/CVE-2026-103678","https://bugzilla.redhat.com/show_bug.cgi?id=2544476","https://github.com/verdammelt/tnef"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/103xxx/CVE-2026-103678.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-103678","state":"PUBLISHED","datePublished":"2026-10-01T11:34:48.652Z","dateUpdated":"2026-10-01T15:00:19.812Z","assignerShortName":"fedora","assignerOrgId":"92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5","dateReserved":"2026-10-01T09:06:43.922Z"},"containers":{"cna":{"title":"Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value","descriptions":[{"lang":"en","value":"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."}],"affected":[{"packageName":"tnef","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.4.18","versionType":"semver"}],"collectionURL":"https://github.com/verdammelt/tnef"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-103678","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2544476","name":"RHBZ#2544476","tags":["issue-tracking","x_refsource_REDHAT"]},{"url":"https://github.com/verdammelt/tnef"}],"metrics":[{"other":{"content":{"value":"Moderate","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","description":"Out-of-bounds Read","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"fedora","orgId":"92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5","dateUpdated":"2026-10-01T11:34:48.652Z"},"datePublic":"2026-10-01T00:00:00.000Z","x_redhatCweChain":"CWE-125: Out-of-bounds Read","timeline":[{"lang":"en","time":"2026-09-30T19:37:30.000Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-10-01T00:00:00.000Z","value":"Made public."}],"credits":[{"lang":"en","value":"Red Hat would like to thank Julien Ahrens (RCE Security GmbH) for reporting this issue."}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-01T15:00:11.354180Z","id":"CVE-2026-103678","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-01T15:00:19.812Z"}}]}}}