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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.

High CVSS 7.5
CVECVE-2026-38753
First seen2026-07-17 00:31 UTC
Disclosed2026-07-15 21:16 UTC
Last updated2026-07-17 00:31 UTC
Channel statusauto

Summary

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.

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Affected products

  • :
Lint boundary warnings (2)

The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: http://busybox.com
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://lists.busybox.net/pipermail/busybox/2026-June/092352.html

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD