6.5

CVE-2026-103680

Tnef: heap buffer overflow in find_free_number() via numbered-backup suffix generation

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Tnef Project ≫ Tnef Version <= 1.4.18
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.29% 0.191
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
patrick@puiterwijk.org 3.1 1.6 1.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

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