CVE-2026-103678

Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value

Published Oct 1, 2026 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Tnef Project
Tnef Project tnef
CPEs cpe:2.3:a:tnef_project:tnef:*:*:*:*:*:*:*:*
Vendors & Products Tnef Project
Tnef Project tnef
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Verdammelt
Verdammelt tnef
Vendors & Products Verdammelt
Verdammelt tnef
Type Values Removed Values Added
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.
Title Tnef: heap out-of-bounds read in get_rtf_data_from_buf() via uncompressed rtf mapi value
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
fedora
Published
Updated
Oct 1, 2026, 3:00 PM
Reserved
Oct 1, 2026, 9:06 AM
Status
Analyzed
Published
Oct 1, 2026, 12:17 PM
Modified
Oct 5, 2026, 2:25 PM