Description
A heap overflow in the ifsbreakup() function (shell/ash.c) of Busybox v1.38.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted input.
Affected products
busybox: busybox
References3
- lists.busybox.net/pipermail/busybox/2026-June/092353.html Mailing ListPatchVendor Advisory
- busybox.net
- lists.busybox.net/pipermail/busybox/2026-June/092360.html
Metrics
- CVSS 3.1
-
5.1
MEDIUM
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L - EPSS — exploit probability
- 0% percentile: 15 · as of 15 November 2026
- CWE
- CWE-125CWE-122
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.