Vulnerability · Published Jul 15, 2026 · Assigned by mitre
CVE-2026-38755
Low 2.9
In plain English
A low-severity heap buffer overflow 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 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)2.9Low
Exploit odds (30 days)0.2%top 89.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | busybox | no fix listed | DEBIAN-CVE-2026-38755 |
| Debian:13 | busybox | no fix listed | DEBIAN-CVE-2026-38755 |
| Debian:14 | busybox | 1:1.38.0-3 | DEBIAN-CVE-2026-38755 |
| Ubuntu:22.04:LTS | busybox | no fix listed | UBUNTU-CVE-2026-38755 |
| Ubuntu:24.04:LTS | busybox | no fix listed | UBUNTU-CVE-2026-38755 |
| Ubuntu:26.04:LTS | busybox | no fix listed | UBUNTU-CVE-2026-38755 |
| Ubuntu:26.10 | busybox | no fix listed | UBUNTU-CVE-2026-38755 |
Affected products (as reported)
Weakness: CWE-674, CWE-122 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L