CVE-2026-38754

FAUCET Score

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.

First published: Jul 15, 2026Last modified: Jul 22, 2026

Impacted Technologies

Vendor	Product	Version(s)	CPE
		1.38.0CPE matchmatch criteria	cpe:2.3:a:busybox:busybox:1.38.0:::::::*
		>= 1.00, <= 1.38.0CPE match	cpe:2.3:a:busybox:busybox::::::::

CVSS Data

CVSS version used by this source: 3.1

5.1MEDIUM

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

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

LOW

Exploitability Score

2.5

Impact Score

2.5

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.24%

Probability of exploitation in next 30 days

EPSS Percentile

14.6%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0024 is in the 2nd percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

microsoftpatch availablevia msrc

Product: azl3 busybox 1.36.1-24 on Azure Linux 3.0Fixed in: 1.36.1-25

Vendor Advisories (1)

microsoft2026-Jul/CVE-2026-38754Important

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.

Jul 14, 2026

References

busybox.net

lists.busybox.net / pipermail/busybox/2026-June/092353.html

Mailing ListPatchVendor Advisory

lists.busybox.net / pipermail/busybox/2026-June/092360.html