CVE-2026-90292 Linux CVE debrief

Who should care

Linux kernel developers and administrators responsible for maintaining and securing Linux-based systems should assess their exposure and apply patches as necessary. Linux kernel developers should review the provided kernel patches and apply them to ensure the vulnerability is addressed. Administrators should verify the Linux kernel version and configuration to determine if the system is affected and monitor system logs for potential exploitation attempts.

Why it matters

A use-after-free vulnerability in the Linux kernel's RDMA/siw implementation could allow local attackers to potentially escalate privileges or cause a denial-of-service. Linux kernel developers and administrators should assess their exposure and apply patches as necessary.

• Verify Linux kernel versions and configurations to determine if systems are affected.
• Apply kernel patches to address the vulnerability.
• Monitor system logs for potential exploitation attempts.
• Assess the potential for use-after-free errors in other kernel components.

Technical summary

The siw_accept() function in the Linux kernel's RDMA/siw implementation does not properly handle QP associations, leading to a potential use-after-free error. This issue has been resolved with kernel patches. The vulnerability affects Linux kernel versions and requires kernel patches to address it. The affected component is the Linux kernel's RDMA/siw implementation. The vulnerability class is use-after-free. The source confidence is high. The CVE record and NVD entry provide additional details on the vulnerability assessment.

Defensive priority

High

Recommended defensive actions

• Review and apply the provided kernel patches to ensure the vulnerability is addressed.
• Verify the Linux kernel version and configuration to determine if the system is affected.
• Monitor system logs for potential exploitation attempts.
• Assess the potential for use-after-free errors in other kernel components.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.
• Check relevant monitoring, detection, and logs for exposed assets that need extra review.
• 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. However, the scope of affected systems and versions is not explicitly stated, requiring further verification. The vulnerability affects Linux kernel versions and requires kernel patches to address it. The CVE record was published on 2026-09-17T17:17:26.400Z and has not been modified since then. The NVD entry provides additional details on the vulnerability assessment. The vulnerability has been resolved with kernel 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.