CVE-2026-80754 Linux CVE debrief

Who should care

Linux kernel developers, Linux distribution maintainers, and users of Linux-based systems, particularly those using the synaptics-rmi4 module, should review their configurations and apply patches to address the vulnerability. This includes IT teams responsible for Linux-based systems, security teams monitoring for potential vulnerabilities, and developers working with the Linux kernel.

Technical summary

The Linux kernel's synaptics-rmi4 module is vulnerable to a typo in the F55 sensor detection, leading to incorrect transmitter electrode count assignment. This could result in incorrect report size calculations and potential out-of-bounds buffer accesses. The vulnerability is caused by a copy-paste error in the F55 sensor detection code, where the receiver (RX) electrode count was incorrectly assigned to the transmitter (TX) electrode count. This typo affects the F54 diagnostics report size calculation, potentially leading to incorrect report size calculations and out-of-bounds buffer accesses on devices with more RX than TX electrodes. To mitigate this vulnerability, it is crucial to correct the typos and ensure accurate TX electrode count assignment.

Defensive priority

Apply patches to address the vulnerability in the Linux kernel's synaptics-rmi4 module.

Recommended defensive actions

• Apply patches to address the vulnerability in the Linux kernel's synaptics-rmi4 module
• Review and update Linux kernel configurations to ensure the synaptics-rmi4 module is properly configured
• Monitor Linux kernel updates for future patches related to this vulnerability
• 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 NVD entry provide details about the vulnerability in the Linux kernel's synaptics-rmi4 module. However, the vendor and product information is not available. To verify and assess the vulnerability, defenders should review the official CVE record, NVD entry, and Linux kernel patch notes. The vulnerability involves a typo in F55 sensor detection, leading to incorrect transmitter electrode count assignment. This could result in incorrect report size calculations and potential out-of-bounds buffer accesses. Linux kernel developers, Linux distribution maintainers, and users of Linux-based systems should review their configurations and apply patches to address the vulnerability.

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.