CVE-2026-38754

Heap Overflow in BusyBox Ash Shell Causes Denial of Service

Published Jul 15, 2026 CVSS 3.1 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
A heap overflow in the ifsbreakup() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Heap Overflow in BusyBox Ash Shell Causes Denial of Service
Type Values Removed Values Added
Title Heap Buffer Overflow in BusyBox ash Shell Leading to Denial of Service
Type Values Removed Values Added
Title Heap Buffer Overflow in BusyBox ash Shell Leading to Denial of Service
Type Values Removed Values Added
Title Heap Overflow in BusyBox ash Shell Causing Denial of Service
Type Values Removed Values Added
Weaknesses CWE-125
CPEs cpe:2.3:a:busybox:busybox:*:*:*:*:*:*:*:*
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'}

cvssV3_1

{'score': 5.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L'}

Type Values Removed Values Added
Title Heap Overflow in BusyBox ash Shell Causing Denial of Service
Type Values Removed Values Added
Weaknesses CWE-122
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'}

Type Values Removed Values Added
First Time appeared Busybox
Busybox busybox
Vendors & Products Busybox
Busybox busybox
Type Values Removed Values Added
Description A heap overflow in the ifsbreakup() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Jul 22, 2026, 2:42 PM
Reserved
Apr 6, 2026, 12:00 AM
Status
Modified
Published
Jul 15, 2026, 10:16 PM
Modified
Jul 22, 2026, 3:16 PM