CVE-2026-80937 Linux CVE debrief

Who should care

Linux kernel developers and maintainers, Linux distribution vendors, system administrators responsible for Linux systems using the mt76 driver, security teams monitoring Linux system vulnerabilities, and operators managing Linux systems in production environments.

Why it matters

This vulnerability in the Linux kernel's mt76 driver can lead to system instability or potential code execution if exploited. Linux system administrators and security teams should verify and apply patches, monitor system logs, and assess system exposure.

• Verify Linux kernel and mt76 driver versions to ensure patches are applied.
• Monitor system logs for potential exploitation attempts.
• Assess system exposure based on device configurations and network connectivity.

Technical summary

The mt7915_mcu_get_eeprom function in the Linux kernel's mt76 driver did not properly validate the device EEPROM address before copying data. This allowed for a 16-byte out-of-bounds write, potentially leading to system crashes or code execution. The issue has been resolved by adding bounds checking for the EEPROM address, preventing potential system instability or code execution. Linux kernel developers and maintainers should review the code changes and apply patches, while Linux distribution vendors and system administrators should verify and apply patches, monitor system logs, and assess system exposure.

Defensive priority

Medium

Recommended defensive actions

• Review and apply the kernel patches referenced in the source records.
• Verify the Linux kernel version and mt76 driver installation on affected systems.
• Monitor system logs for potential exploitation attempts.
• 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.
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.

Evidence notes

The CVE record and NVD entry provide details about the vulnerability. However, the scope of affected systems and versions is not explicitly stated, requiring further verification and defensive review of Linux kernel and mt76 driver versions. The issue is resolved in the latest kernel updates, and users should ensure they are running a patched version. Additional information can be found in the official CVE record and NVD entry.

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.