CVE-2022-3437: Fedoraproject Fedora

Medium severity, CVSS 6.5. EPSS: 3.7% chance of exploitation in the next 30 days.

A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the application, possibly resulting in a denial of service (DoS) attack.

Affected products

• Fedoraproject Fedora: version 36 only; version 37 only
• Samba Samba: from 4.0.0, before 4.15.11 (fixed in 4.15.11); from 4.16.0, before 4.16.6 (fixed in 4.16.6); from 4.17.0, before 4.17.2 (fixed in 4.17.2)

Published 2023-01-12. Last modified 2026-06-17.