CVE-2024-57973 Linux CVE debrief

Who should care

Defenders of Linux-based systems, especially those using the rdma/cxgb4 component, should assess exposure and verify system configurations. Roles include Linux administrators, security teams, and developers working with the Linux kernel.

Why it matters

CVE-2024-57973 is a Linux kernel vulnerability that requires local access and specific configurations to be exploited. Defenders should verify system configurations, limit access, and monitor logs to prevent potential exploitation.

• Verification of system configurations and updates is required to ensure the vulnerability is mitigated.
• Defenders should limit access to the interactive shell of the additional GNU/Linux subsystem to trusted personnel only.
• Building and running applications from trusted sources only can help prevent exploitation.
• Monitoring system logs for potential exploitation attempts is recommended.

Technical summary

The Linux kernel vulnerability CVE-2024-57973 is caused by a user-controlled variable 'gl->tot_len' in the rdma/cxgb4 component, potentially leading to an integer overflow on 32-bit systems. The issue is addressed by using the size_add() function. This vulnerability requires local access and specific configurations to be exploited. Affected systems using the rdma/cxgb4 component should be assessed for exposure, and defenders should verify system configurations to ensure mitigation. The use of size_add() prevents the integer wrapping bug that could occur when adding 'gl->tot_len' with the sizes of 'struct cpl_pass_accept_req' and 'struct rss_header'.

Defensive priority

Medium priority, as the vulnerability requires local access and a specific configuration to be exploited.

Recommended defensive actions

• Review and limit access to the interactive shell of the additional GNU/Linux subsystem to trusted personnel only.
• Ensure that applications are built and run from trusted sources only.
• Monitor system logs for potential exploitation attempts.
• Verify system configurations and update to the latest version when available.
• Perform vulnerability scanning and risk assessment to identify potential exposure.
• Implement compensating controls for exposed systems while remediation is scheduled and verified.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and Siemens advisory provide details about the vulnerability. However, the scope of affected systems and potential impact require further verification and detailed analysis. Defenders should verify system configurations, review advisories, and assess exposure to ensure mitigation. Evidence from official sources indicates a potential integer overflow on 32-bit systems in the rdma/cxgb4 component of the Linux kernel. The issue is mitigated by using the size_add() function. Further verification of system configurations and

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.