SB2026090414 - Out-of-bounds write in Linux kernel input rmi4 driver
Published: September 4, 2026
Security Bulletin ID
SB2026090414
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2026-80754)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to incorrect transmitter electrode count assignment in the Synaptics RMI4 F55 driver when F55 sensor detection handles a device with more receiver than transmitter electrodes. A local user can trigger F55 sensor detection to cause a denial of service.
The incorrect transmitter count is propagated to F54 for diagnostic report size calculations.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0739c65e799d4a93fe573ed23255a71fcfcc5438
- https://git.kernel.org/stable/c/6058f0fea10f3caf63a435677358d1b8e9325114
- https://git.kernel.org/stable/c/6484e00d6778fdf2209cd75940bc3902b276457f
- https://git.kernel.org/stable/c/9759502f5cd71805923457f183ae5b9533e20c7b
- https://git.kernel.org/stable/c/9b184c8337c6e12df129399007735a7fbcbbcb7b
- https://git.kernel.org/stable/c/a6d9646e77da7cab2dff7043a8e9f75e23b836bc
- https://git.kernel.org/stable/c/a81cafe3c3c2f8494063385a7b0ea7ff407bf19f
- https://git.kernel.org/stable/c/db4e20265ebda729610ca5cf45ca9437462c3f36