CVE-2026-103679

A flaw was found in tnef. A remote attacker could exploit this vulnerability by providing a specially crafted Transport Neutral Encapsulation Format (TNEF) file containing multiple message bodies. During extraction, improper memory management triggers a use-after-free and double-free condition, causing the application to crash and resulting in a Denial of Service (DoS).

CVSS 3.1

6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS

0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-25)

CWE

CWE-416

Published

2026-10-01

Modified

2026-10-05

Record from

the NVD, synced 2026-10-19

Affected

• tnef_project:tnef

References

• https://access.redhat.com/security/cve/CVE-2026-103679
• https://bugzilla.redhat.com/show_bug.cgi?id=2544477
• https://github.com/verdammelt/tnef

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