CVE-2026-88833

MediumCVSS 6.5/10Last modified Nov 13, 2026

Description

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-191

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 6	—
Red Hat	Red Hat Hardened Images	—

References

Timeline

Published: Oct 13, 2026
Last modified: Nov 13, 2026
NVD status: Awaiting Analysis

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