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Linux Kernel TCP Data-Race Vulnerability in sysctl_tcp_notsent_lowat

Vulnerability

A data-race vulnerability has been identified in the Linux kernel's TCP implementation, specifically around the sysctl_tcp_notsent_lowat parameter. This vulnerability arises because the parameter can be changed concurrently while being read, leading to potential inconsistencies. The issue has been addressed by adding a READ_ONCE() directive to the reader of the parameter.

Impact

Exploitation of this vulnerability could lead to a data-race condition, causing inconsistent reads of the sysctl_tcp_notsent_lowat parameter.

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
5.0
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.