Integer Underflow Affecting busybox package, versions *


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.19% (8th percentile)

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  • Snyk IDSNYK-ECHOLATEST-BUSYBOX-20936334
  • published14 Oct 2026
  • disclosed13 Oct 2026

Introduced: 13 Oct 2026

NewCVE-2026-88833  (opens in a new tab)
CWE-191  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest busybox.

NVD Description

Note: Versions mentioned in the description apply only to the upstream busybox package and not the busybox package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

A flaw was found in BusyBox's udhcpc DHCP client. When processing raw DHCP packets, the client replaces the validated packet length with an attacker-controlled value from the IP header without re-validating the minimum size. This leads to an integer underflow when subtracting header sizes, causing a subsequent memory copy with a massively oversized length. An attacker on the same network segment can send a specially crafted packet to crash the DHCP client, resulting in denial of service and loss of network connectivity.

CVSS Base Scores

version 3.1