CVE-2026-124740

MediumCVSS 4.3/10Last modified Nov 12, 2026

Description

A flaw was found in BusyBox's udhcpc6 DHCPv6 client. A malicious server on the local network can trigger a use-after-free condition by responding with a crafted Dynamic Host Configuration Protocol for IPv6 (DHCPv6) reply packet lacking usable address options. This issue causes the client to read stale heap memory, which can result in a Denial of Service (DoS) due to an application crash or disclose previously assigned network address data in subsequent discovery requests.

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-416

Affected software

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

No affected versions have been published.

Timeline

Published: Nov 11, 2026
Last modified: Nov 12, 2026
NVD status: Awaiting Analysis

Related CVEs from 2026

CVE-2026-1247417.6A flaw was found in BusyBox. The udhcpc6 DHCPv6 client does not properly validate the size of network options sent by a server before copyin CVE-2026-1247425.5A flaw was found in BusyBox. The volume identification component fails to properly validate cluster parameters when analyzing specially form CVE-2026-1247435.5A flaw was found in BusyBox. When processing filesystem metadata, the volume identification component does not properly validate header valu CVE-2026-1247446.3A flaw was found in BusyBox. When extracting files using the cpio utility with path traversal protection enabled, hardlink target paths are CVE-2026-1247456.3A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links CVE-2026-1247465.5A flaw was found in BusyBox. An integer overflow occurs in the volume_id component when calculating buffer boundaries while probing filesyst CVE-2026-1247477.5A flaw was found in BusyBox. When resuming a download over File Transfer Protocol (FTP), the wget utility fails to verify that the resume of CVE-2026-1247526.5Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in BdThemes Element Pack Elementor Addons CVE-2026-1247534.3Missing Authorization vulnerability in Ahmad WP Job Portal wp-job-portal allows Exploiting Incorrectly Configured Access Control Security Le CVE-2026-124767.2The Easy Digital Downloads plugin for WordPress is vulnerable to Arbitrary File Upload in versions up to and including 3.6.9. This is due to CVE-2026-124763The Woocommerce Wishlist WordPress plugin through 1.1.0 does not have authorisation and CSRF checks in one of its unauthenticated AJAX actio CVE-2026-124774.4The Gravity Booster – Styles & Layouts for Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin setting