CVE-2026-103679
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).
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-103679 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- github.com/verdammelt/tnef
Frequently asked questions
- What is CVE-2026-103679?
- CVE-2026-103679 is a medium-severity vulnerability, classified under Use After Free. CVSS score: 6.5/10. Published 2026-10-01.
- How severe is CVE-2026-103679?
- Medium severity. CVSS v3 base score is 6.5 out of 10.