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CVE-2026-43111: HID: roccat: fix use-after-free in roccat_report_event

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-06 · updated 2026-10-19
• Weakness: CWE-416

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.

Affected products

• Linux kernel: from 2.6.35 before 6.6.136; from 6.7 before 6.12.83; from 6.13 before 6.18.24; from 6.19 before 6.19.14; 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4, 7.0-rc5, 7.0-rc6 (+1) — fixed in 6.12.83, 6.18.24, 6.19.14, 6.6.136

How to fix

Upgrade to a fixed version: Linux kernel 6.12.83, 6.18.24, 6.19.14, 6.6.136. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/181ea51ab0f6370842c5b49cfb86824253a1189e
• https://git.kernel.org/stable/c/20dca865460f7943cf70afca274b60dac371f546
• https://git.kernel.org/stable/c/36bb2d0b915014bbdc5044982b31b57b78045b93
• https://git.kernel.org/stable/c/441689e3103694caa3e2d62b7d57c7bccefa5e37
• https://git.kernel.org/stable/c/bca0b595e15450dd66b1153c76c4ef1087ee011b
• https://git.kernel.org/stable/c/d802d848308b35220f21a8025352f0c0aba15c12
• https://git.kernel.org/stable/c/e16a6d11bd77b81632165f02cf0d5946df74b3b7
• https://git.kernel.org/stable/c/e6a445513fbc6a0329d2d5ff375b6725750ec5a6
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

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