Vulnerability · Published Jul 15, 2026 · Assigned by mitre
CVE-2026-38754
Medium 5.1
In plain English
A medium-severity out-of-bounds read in BusyBox from BusyBox. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.1Medium
Exploit odds (30 days)0.2%top 85.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | busybox | no fix listed | DEBIAN-CVE-2026-38754 |
| Debian:13 | busybox | no fix listed | DEBIAN-CVE-2026-38754 |
| Debian:14 | busybox | 1:1.38.0-3 | DEBIAN-CVE-2026-38754 |
| Ubuntu:22.04:LTS | busybox | no fix listed | UBUNTU-CVE-2026-38754 |
| Ubuntu:24.04:LTS | busybox | no fix listed | UBUNTU-CVE-2026-38754 |
| Ubuntu:26.04:LTS | busybox | no fix listed | UBUNTU-CVE-2026-38754 |
| Ubuntu:26.10 | busybox | no fix listed | UBUNTU-CVE-2026-38754 |
Affected products (as reported)
Weakness: CWE-125, CWE-122 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L