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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Busybox
  • Busybox

No data.

No data.

References
Link Providers
http://busybox.com cve-icon
https://lists.busybox.net/pipermail/busybox/2026-June/092352.html cve-icon
History

Fri, 17 Jul 2026 06:15:00 +0000

Type Values Removed Values Added
Title BusyBox 1.38.0 AWK Use‑After‑Free Leading to Denial of Service

Thu, 16 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 16 Jul 2026 01:30:00 +0000

Type Values Removed Values Added
First Time appeared Busybox
Busybox busybox
Vendors & Products Busybox
Busybox busybox

Wed, 15 Jul 2026 21:00:00 +0000

Type Values Removed Values Added
Description 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.
References
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-07-15T00:00:00.000Z

Updated: 2026-07-16T15:23:10.717Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-38753

cve-icon Vulnrichment

Updated: 2026-07-16T15:23:05.600Z

cve-icon NVD

No data.

cve-icon Redhat

No data.