CVE-2026-38755: High severity busybox vulnerability
Published Jul 15, 2026
·Updated
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.
Affected Software
3 affected componentsFixes available
busybox=1.38.0
Busybox Busybox=1.38.0
Microsoft azl3 busybox 1.36.1-24<1.36.1-25
1.36.1-25
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 1.36.1-25
Event History
Jul 15, 2026
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·10:16 PM
RemedyDescriptionSeverityWeaknessAffected Software
Jul 19, 2026
Data Sourced
via Microsoft·08:02 AM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·08:02 AM
DescriptionSeverity
Frequently Asked Questions
1
What is the severity of CVE-2026-38755?
The severity of CVE-2026-38755 is rated high with a CVSS score of 7.5.
2
What type of vulnerability is CVE-2026-38755?
CVE-2026-38755 is a heap overflow vulnerability affecting the evalcommand() function in Busybox.
3
How do I fix CVE-2026-38755?
To fix CVE-2026-38755, apply the available patch for Busybox.
4
What impact does CVE-2026-38755 have on my system?
CVE-2026-38755 can cause a Denial of Service (DoS) by allowing attackers to exploit the vulnerability with crafted input.
5
Which versions of Busybox are affected by CVE-2026-38755?
CVE-2026-38755 affects Busybox version 1.38.0.