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Medium 4.9Published Jul 15, 2026

CVE-2026-38753A 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.

Updated under an hour ago ()

Does this affect you?

It affects busybox. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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.

CVSS
4.9 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness (CWE)
CWE-416
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
Not given
NVD analysis
Modified
Record last updated
Jul 20, 2026
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
busybox busybox
busybox:busybox
1.38.0
NVD

References

  • mailing-list, patch, vendor-advisory

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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