CVE-2026-99075 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution maintainers, and users of Linux-based systems should assess exposure and apply patches or updates as necessary. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Additionally, they should plan vendor-supported updates or mitigations through normal change control where exposure is confirmed and monitor system logs forpotential

Why it matters

This vulnerability in the Linux kernel's rust_binder component can cause issues with node state synchronization, potentially leading to system instability or security problems. Linux kernel developers, maintainers, and users of Linux-based systems should assess exposure and apply patches or updates as necessary.

• Potential denial of service due to node not being freed
• Possible system crashes or instability
• Increased risk of security issues due to desynchronized node states

Technical summary

The Linux kernel's rust_binder component has a vulnerability that can cause a node's delivery state and count state to become desynchronized. This occurs when a thread exits while holding a pending node refcount increment, potentially preventing the node from being freed from the process's nodes tree. The vulnerability can lead to system instability or security problems if not addressed. The issue can be resolved by implementing DeliverToRead::cancel() for Node and NodeWrapper to move the pending refcount update to the process's work queue on thread exit.

Defensive priority

Medium

Recommended defensive actions

• Review and apply patches provided by Linux for the affected versions
• Update Linux kernel to version 6.18.57 or later
• Monitor system logs for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and source item provide details about the vulnerability, but do not offer specific information on exploitation or victim impact. The vendor, Linux, has provided affected versions and patches.

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.