Buffer overflow in Busybox
CVE-2026-38755
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.9 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.002 (10.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.002 · change: -0.001
Affected products
- Busybox — versions 1.38.0, 0.52
Weakness classification (CWE)
References
- busybox.com (Product)
- lists.busybox.net/pipermail/busybox/2026-June/092354.html (Patch, Mailing List, Vendor Advisory)
- busybox.net
Frequently asked questions
- What is CVE-2026-38755?
- CVE-2026-38755 is a low-severity vulnerability in Busybox, classified under Uncontrolled Recursion. CVSS score: 2.9/10. Published 2026-07-15.
- How severe is CVE-2026-38755?
- Low severity. CVSS v3 base score is 2.9 out of 10.