CVE-2026-98560 Linux CVE debrief

Who should care

Linux kernel administrators and security teams should assess exposure and prioritize verification of affected systems due to the potential for denial of service (DoS) or system crashes. They should review and apply the provided kernel patches, and verify if the system is using the affected RDS functionality.

Why it matters

Linux kernel administrators should assess exposure and prioritize verification of affected systems due to the potential for denial of service (DoS) or system crashes.

• Verification of affected Linux kernel systems is required to determine exposure
• Potential denial of service (DoS) or system crashes may occur if exploited

Technical summary

The Linux kernel's RDS (Reliable Datagram Service) has a vulnerability that has been resolved. The issue arises from the incorrect sizing of a connection's path set by the transport it ends up with. This leads to the allocation of an ordered workqueue for each path, while only path 0 has transport data. The vulnerability can cause issues on every netns teardown or module unload, and Linux kernel administrators and security teams should assess exposure and prioritize verification of affected systems. The CVE record and NVD entry provide details on the vulnerability.

Defensive priority

Linux kernel administrators should assess exposure and prioritize verification of affected systems.

Recommended defensive actions

• Assess exposure of Linux kernel systems to this vulnerability
• Verify if the system is using the affected RDS functionality
• Review and apply the provided kernel patches
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in the Linux kernel's RDS (Reliable Datagram Service), which has been resolved. The issue arises from the incorrect sizing of a connection's path set by the transport it ends up with. This leads to the allocation of an ordered workqueue for each path, while only path 0 has transport data. The scope of affected systems and versions is not explicitly stated, but Linux kernel administrators and security teams should assess exposure and prioritize verification of affected 3

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.