CVE-2026-103680

Description

A flaw was found in tnef. A heap-based buffer overflow can occur in the find_free_number() function when generating numbered backup suffixes for duplicate filenames. When numbered backups are enabled and file overwriting is disabled, an attacker can supply a specially crafted Transport Neutral Encapsulation Format (TNEF) file with an excessive number of colliding attachment filenames, causing the numeric counter to write past the allocated memory buffer. This issue may result in an application crash, leading to a Denial of Service (DoS), or potentially arbitrary code execution.

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Produits concernés

• Tnef project tnef

Scores CVSS

Faiblesses (CWE)

• CWE-787

Références

• https://access.redhat.com/security/cve/CVE-2026-103680 Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2544478 Issue TrackingThird Party Advisory
• https://github.com/verdammelt/tnef Product

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories