CVE-2026-98670 Linux CVE debrief

Who should care

Defenders responsible for Linux kernel maintenance, patch management, and system security should assess exposure and prioritize verification of affected kernel versions. This includes operators, platform administrators, vulnerability management teams, and security teams who need to ensure that their systems are updated with the latest patches for xilinx-xadc to prevent potential exploitation. Additionally, defenders should review system logs and monitoring

Why it matters

Defenders should assess exposure and prioritize verification of Linux kernel versions and patches for xilinx-xadc. This vulnerability may impact systems using affected kernel versions.

• Verify Linux kernel versions for xilinx-xadc patches
• Assess system exposure to affected kernel versions
• Apply patches or updates for xilinx-xadc driver

Technical summary

The Linux kernel's iio: adc: xilinx-xadc driver had a vulnerability where the ZYNQ XADC alarm IRQ handler could queue work after the xadc structure had been freed. This was resolved by reordering devm callback registration and IRQ request. The fix ensures the handler can no longer queue work by the time the workqueue is cleared, preventing potential use-after-free issues. Defenders should assess exposure and prioritize verification of Linux kernel versions and patches for xilinx-xadc, as this vulnerability may impact systems using affected kernel versions.

Defensive priority

Defenders should assess exposure and prioritize verification of Linux kernel versions and patches for xilinx-xadc. This vulnerability may impact systems using the affected kernel versions.

Recommended defensive actions

• Assess Linux kernel versions and patches for xilinx-xadc
• Verify system exposure to the affected kernel versions
• Apply patches or updates for the xilinx-xadc driver
• 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 issue was found by an in-house static analysis tool. The CVE Program and NVD provide official records and vulnerability details. Defenders should verify affected kernel versions and assess exposure based on the provided information, with a focus on xilinx-xadc patches and potential system impacts. Evidence is limited to public sources and may not cover all affected deployments.

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.