CVE-2026-38753: A use-after-free in the awk_sub() function (editors/awk.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted AWK script.

Overview

Severity

Medium (CVSS 4.9)

CVSS Vector

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

Exploit Status

Not Exploited

Patch Tuesday

2026-Jul

Released

2026-07-21

Last Updated

2026-08-10

EPSS Score

0.25% (percentile: 15.7%)

Affected Products (2)

Other

• 21396-17084
• 21638-17084

Revision History

• 2026-07-21: Information published.
• 2026-07-21: Information published.
• 2026-07-23: Information published.
• 2026-08-10: Information published.