CVE-2026-98947 Linux CVE debrief

Who should care

Linux system administrators, security teams, and developers using the vsock component should assess their exposure and apply patches or upgrades as needed. The vulnerability may lead to memory leaks in the Linux kernel's vsock component. Linux system administrators, security teams, and developers should assess their exposure and apply patches or upgrades as needed.

Why it matters

This vulnerability may lead to memory leaks in the Linux kernel's vsock component. Linux system administrators, security teams, and developers should assess their exposure and apply patches or upgrades as needed.

• Verify potential memory leaks in vsock datagram sockets
• Assess and apply patches or upgrades for affected Linux versions
• Monitor vsock component for unusual memory usage

Technical summary

The vulnerability is caused by a memory leak in the vmci_transport_recv_dgram_cb() function during the closure of a datagram socket. This may lead to memory leaks if not properly handled. A receive queue cleanup has been added to the socket destructor to fix this issue. The vulnerability has been addressed with a receive queue cleanup in the socket destructor. Linux system administrators, security teams, and developers using the vsock component should assess their exposure and apply patches or upgrades as needed. The vulnerability has been identified in the Linux kernel's vsock component, specifically in the vmci_transport_recv_dgram_cb() function.

Defensive priority

Apply patch or upgrade to affected Linux versions

Recommended defensive actions

• Assess exposure of Linux vsock component in your environment
• Verify if your Linux distribution is affected and apply patches if available
• Monitor for potential memory leaks in vsock datagram sockets
• 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 source item provide details on the vulnerability, including its description and affected versions. However, the CVSS score and severity are not provided. The vulnerability is caused by a memory leak in the vmci_transport_recv_dgram_cb() function during the closure of a datagram socket. This may lead to memory leaks if not properly handled. A receive queue cleanup has been added to the socket destructor to fix this issue.

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.