CVE-2026-68340
HighCVSS 7.7Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
In the Linux kernel's hwmon occ, the poll response parser uses the static backing-array capacity as the parse boundary instead of data_length, allowing reads beyond the current response when data is truncated.
Risk Assessment
The vulnerability could lead to information disclosure or system crashes due to improper parsing of OCC controller responses.
Recommendation
Apply the Linux kernel patch that uses data_length as the boundary and validates block headers before reading them.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: hwmon: occ: validate poll response sensor blocks The OCC poll response parser walks a counted list of sensor data blocks. It used the static backing-array capacity as the parse boundary, but a transport response makes only data_length bytes current and valid. A truncated response can therefore make the parser consume a block header or block extent outside the current response. Use data_length as the parent boundary, prove the fixed poll header and each current block header before reading them, and prove the complete block before advancing. Keep parsed sensor metadata local until the complete response has passed validation, then publish it. Propagate malformed-response errors before publishing the OCC as active.