CVE-2021-3403

PoC —

CVSS 3.1

7.8 high

EPSS

2%p77

Published

Mar 4, 2021 (Mar 4, 2021)

Modified

Jun 17, 2026

Description

In ytnef 1.9.3, the TNEFSubjectHandler function in lib/ytnef.c allows remote attackers to cause a denial-of-service (and potentially code execution) due to a double free which can be triggered via a crafted file.

Vendors: ytnef project redhat fedoraproject
Products: ytnef, enterprise linux, fedora
Weakness: CWE-416, CWE-415
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (1.8%)

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