CVE-2026-38755: A heap overflow in the evalcommand() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input.

Overview

Severity

High (CVSS 7.5)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-07-19

Last Updated

2026-07-21

EPSS Score

0.34% (percentile: 27.1%)

Affected Products (1)

Other

• 21396-17084

Revision History

• 2026-07-19: Information published.
• 2026-07-20: Information published.
• 2026-07-21: Information published.