CVE-2026-124741

high

Description

A flaw was found in BusyBox. The udhcpc6 DHCPv6 client does not properly validate the size of network options sent by a server before copying them into memory. A malicious DHCPv6 server on the local network can exploit this flaw by sending a crafted reply, triggering a stack-based buffer overflow. This vulnerability could allow an attacker to achieve arbitrary code execution with root privileges or cause a denial of service (DoS) crash.

References

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-123349

https://bugzilla.redhat.com/show_bug.cgi?id=2571617

https://access.redhat.com/security/cve/CVE-2026-124741

Details

Source: Mitre, NVD

Published: 2026-11-11

Updated: 2026-11-12

Risk Information

CVSS v2

Base Score: 7.3

Vector: CVSS2#AV:A/AC:L/Au:N/C:P/I:P/A:C

Severity: High

CVSS v3

Base Score: 7.6

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

Severity: High

EPSS

EPSS: 0.00275