Answer in brief
CVE-2026-80566 records a Unknown severity vulnerability in Input: hynitron_cstxxx - validate touch count and finger IDs. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=66603243f5283f7f28c795f09e7c2167233df0bd <ec61ca4e310665816a639cb2e46cd9b3af0a9bee || >=66603243f5283f7f28c795f09e7c2167233df0bd <387829ee60de26c7c073ed4e27ecfab2b75d4c74 || >=66603243f5283f7f28c795f09e7c2167233df0bd <38e7d5c1ade04b99c70da0298ca296ee62bc99c0 || >=66603243f5283f7f28c795f09e7c2167233df0bd <51c5503554c87e4de4035468bebf186205391ce9 || >=66603243f5283f7f28c795f09e7c2167233df0bd <27f380ef0e1d3de3cde114e02d33f9320ce3a5a6 | ec61ca4e310665816a639cb2e46cd9b3af0a9bee, 387829ee60de26c7c073ed4e27ecfab2b75d4c74, 38e7d5c1ade04b99c70da0298ca296ee62bc99c0, 51c5503554c87e4de4035468bebf186205391ce9, 27f380ef0e1d3de3cde114e02d33f9320ce3a5a6 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 26, 2026
In the Linux kernel, the following vulnerability has been resolved: Input: hynitron_cstxxx - validate touch count and finger IDs The driver allocates max_touch_num input slots, which are indexed from zero through max_touch_num - 1. The current check allows a finger ID equal to max_touch_num to reach cst3xx_report_contact(). While the input core ignores out-of-range slot indices, reporting touch data without a valid slot change corrupts the touch state of the previously active slot. The touch count is read from the controller's report and is used to index the fixed-size report buffer without first checking its range. Reject counts larger than the supported number of touch slots before checking the trailing byte or parsing touch data. Reject finger IDs equal to or greater than max_touch_num, and return immediately when an invalid finger ID is encountered so that corrupt touch frames are discarded instead of reporting partial contact state. The V821 Avaota F1 board configures the vendor driver with one touch slot, so finger ID 1 is already invalid on that device.
Quoted source text, attributed separately from HOL analysis.