CVE-2025-39766

Name of the Vulnerable Software and Affected Versions: Linux kernel (affected versions not specified)

Description: A flaw exists in the Linux kernel's networking scheduler related to the cake queuing discipline. Specifically, cake enqueue does not return NET XMIT CN when packets are dropped due to exceeding the buffer limit. This can lead to a WARNING in htb activate when an empty child queue is encountered. The issue is triggered by a low memlimit setting, causing packet dropping, while cake enqueue incorrectly returns NET XMIT SUCCESS.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.