Out-of-bounds read in Linux kernel - CVE-2026-64276
Published: July 27, 2026
Vulnerability identifier: #VU139705
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64276
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service or disclose sensitive information.
The vulnerability exists due to out-of-bounds read and out-of-bounds write in the rmi_f30_attention handler and EVIOCGKEYCODE/EVIOCSKEYCODE ioctl handling in the synaptics-rmi4 F30 driver when processing a device that reports a gpioled_count greater than 6 with GPIO support enabled. A local user can trigger the attention interrupt or use EVIOCGKEYCODE/EVIOCSKEYCODE ioctls to cause a denial of service or disclose sensitive information.
The issue occurs because the keymap allocation is smaller than the gpioled_count value used for iteration and keycode bounds.
Affected software
Linux kernel
How to mitigate CVE-2026-64276
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/26c895928d7118436a24f564587cb4aefc40cdd8
- https://git.kernel.org/stable/c/4e3689c26854356f41fbaa1eafa382e58ac79e00
- https://git.kernel.org/stable/c/8c6d18d61bb6fe0e6edf848413391c590552e8a9
- https://git.kernel.org/stable/c/bfe622efecd4ff0a792d0ecd1a8dce535a902f50
- https://git.kernel.org/stable/c/d162a1ead7de404d8b41a093c83ed0db6487cded
- https://git.kernel.org/stable/c/d577e46785d45484b2ab7e7309c49b18764bf56c
- https://git.kernel.org/stable/c/e849c6f51e6877104c765da084e001ec37c8e119
- https://git.kernel.org/stable/c/f0be9eba946e9200b43265e0a748d38bd0a56954