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Linux Kernel L4 Checksum Offload Vulnerability in Net Libwx

Vulnerability

A vulnerability in the Linux kernel's networking component, specifically in the libwx library, has been addressed. The issue arose because the hardware only supports Layer 4 (L4) checksum offload for TCP, UDP, and SCTP protocols. A bug caused the transmission (Tx) checksum flag to be incorrectly set for other protocols, leading to a hang in the Tx ring. The vulnerability has been fixed by implementing a software checksum calculation for these affected packets.

Impact

The vulnerability could cause a hang in the transmission ring, disrupting network communication.

Added: Jun 9, 2025, 7:46 PM
Updated: Jun 9, 2025, 7:46 PM

Vulnerability Rating

Custom Algorithm
spread
9.0
impact
2.5
exploitability
5.3
remediation
0.0
relevance
0.0
threat
3.2
urgency
2.9
incentive
1.7

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.