SB20260912162 - Use-after-free in Linux kernel hid driver
Published: September 12, 2026
Security Bulletin ID
SB20260912162
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-89622)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 1 [CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows an attacker with physical access to cause memory corruption.
The vulnerability exists due to a write use-after-free in the MCP2221 HID driver's mcp_i2c_smbus_read() and mcp2221_raw_event() functions when processing a delayed or spurious MCP2221_I2C_GET_DATA report after an I2C/SMBus transfer has ended. An attacker with physical access can trigger a report that writes device data to freed memory to cause memory corruption.
Remediation
Install update from vendor's website.