What is CVE-2026-38753?

CVE-2026-38753 is a high-severity vulnerability in Busybox, classified under Use After Free. CVSS score: 7.5/10. Published 2026-07-15.

How severe is CVE-2026-38753?

High severity. CVSS v3 base score is 7.5 out of 10.

Use After Free in Busybox

CVE-2026-38753

A use-after-free in the awk_sub() function (editors/awk.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted AWK script.

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Busybox — versions 1.38.0
N/a — versions n/a

Weakness classification (CWE)

CWE-416 — Use After Free

References

cve@mitre.org (Product)
cve@mitre.org (Patch, Mailing List, Vendor Advisory)

Frequently asked questions

What is CVE-2026-38753?: CVE-2026-38753 is a high-severity vulnerability in Busybox, classified under Use After Free. CVSS score: 7.5/10. Published 2026-07-15.
How severe is CVE-2026-38753?: High severity. CVSS v3 base score is 7.5 out of 10.