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Vulnerability DatabaseCVE-2025-39703
CVE-2025-39703:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2025-39703 affects the Linux kernel's networking subsystem, specifically related to HSR (High-availability Seamless Redundancy) frame handling. The vulnerability was disclosed in September 2025 and involves issues with HSR frame tag handling (Red Hat CVE).
Technical details
The vulnerability exists in the Linux kernel's net/hsr subsystem where HSR frames are not properly rejected when the skb (socket buffer) cannot hold the required tag. This has been assigned a CVSS v3 base score of 7.0, indicating moderate severity (Rapid7 Blog).
Impact
The vulnerability could potentially affect systems using HSR networking features in the Linux kernel, potentially leading to network-related issues when processing HSR frames. The moderate severity score suggests significant but not critical impact on affected systems (Red Hat CVE).
Mitigation and workarounds
The vulnerability has been resolved in the Linux kernel through a patch that implements proper rejection of HSR frames when the skb cannot hold the tag. System administrators are advised to apply the latest kernel updates that include this fix (Red Hat CVE).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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