CVE-2022-3437

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of service disruption.

Exploit odds

3.9% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2023-01-12 15:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 04:59 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 3.9% in the next 30 days (EPSS).
• Severity: 6.5 MEDIUM (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2023-01-12 15:15 UTC

Last modified

2026-06-17 04:59 UTC

Exploit probability

3.9% · EPSS, next 30 days

Weakness

CWE-122

Record status

Modified

Affected

• Samba < 4.15.11
• Samba < 4.16.6
• Samba < 4.17.2
• Fedoraproject Fedora 36
• Fedoraproject Fedora 37

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2022-3437.md and follow it. Check whether this project is affected by CVE-2022-3437. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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