CVE-2026-38753

MEDIUM
Published Jul 15, 2026 Modified Jul 20, 2026 CWE-416

Description

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.

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CVSS v3.1 Score

4.9
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploit Prediction

0.0015
Probability of exploitation
0.04%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-416 Use After Free

Affected Products

Vendor Product
busybox busybox

References

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 4.9 (MEDIUM).
How severe is CVE-2026-38753? +
CVE-2026-38753 has a CVSS v3.1 score of 4.9 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0015, placing it in the 0th percentile for exploitation probability.
What products are affected by CVE-2026-38753? +
CVE-2026-38753 affects products from busybox, specifically: busybox. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-38753? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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