mld: fix panic in mld_newpack() - Kernel

Kernel Updated 02 Oct 2025

Summary

04/06/2021

Disclosed on

N/A

Severity

No i

Fix available

Unrated

Severity

Not published

CVSS Score

GSD-2021-1000540: mld: fix panic in mld_newpack(). Affects Kernel versions >= 72e09ad107e78d69ff4d3b97a69f0aad2b77280f, < a76fb9ba545289379acf409653ad5f74417be59c. No fix is published. How to fix ↓

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Background

The Kernel is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices. It manages system resources, facilitates communication between software and hardware, and supports various subsystems. The mld_newpack() function in the Kernel is responsible for handling Multicast Listener Discovery (MLD) packets. MLD is a protocol used by IPv6 hosts to discover and manage multicast group memberships. However, a vulnerability exists in the mld_newpack() function that can lead to a panic, causing the system to crash.

Vulnerability Detail

The vulnerability in mld_newpack() was introduced in version v2.6.35 of the Linux Kernel and is fixed in version v5.12.9. When processing MLD packets, a flaw in the code can trigger a panic, resulting in a system crash. An attacker could potentially exploit this vulnerability by sending specially crafted MLD packets to a vulnerable system, causing a denial-of-service (DoS) condition. The impact of this vulnerability is limited to systems running the affected versions of the Linux Kernel.

How To Fix

No fixed version is published for this vulnerability.

To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.12.9 or later. This can be done by obtaining the latest stable version of the Kernel from the official Git repository (https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/) and following the installation instructions provided. It is important to ensure that the updated Kernel is compatible with the specific distribution and hardware configuration of the system.

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Workaround

No workaround is available for this vulnerability. It is necessary to apply the fix by updating the Linux Kernel.

Conclusion

The mld_newpack() vulnerability in the Kernel can lead to a system crash when processing MLD packets. It is crucial to update the Linux Kernel to version v5.12.9 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.

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