CVE-2026-89999: HID: wacom: validate report length in wacom_intuos_pro2_bt_irq
HID: wacom: validate report length in wacomintuospro2btirq
Affected Software
Remediation
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Fixed in 6.6.157.1-1 - Upgrade
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ubuntu/linux-riscvto a version that resolves this vulnerability.Fixed in 7.0.0-42.42.1 - Compensating control
In wacom_intuos_pro2_bt_irq(), before parsing, validate len against the selected branch’s required report length: require at least 286 bytes for INTUOSP2_BT/INTUOSP2S_BT and at least 46 bytes for INTUOSHT3_BT (gen3); warn and return 0 for shorter reports so the parser chain is not called.
Event History
Frequently Asked Questions
Which device variants are affected by the missing length validation?
The affected parsing paths are INTUOSP2_BT and INTUOSP2S_BT, which require reports of at least 286 bytes, and INTUOSHT3_BT (“gen3”), which requires reports of at least 46 bytes. The device type is selected from the VID/PID id_table entry.
What occurs when a report is shorter than the parser expects?
After the report-ID check, the handler invokes fixed-offset sub-parsers without passing or checking the received report length. A short report can therefore cause accesses beyond the available report data, including data[285] on the Pro2 paths and data[45] on the gen3 path.
Does registering the relevant input interfaces depend on receiving a full report?
No. wacom_setup_device_quirks() force-registers the pen, pad, and touch inputs for the selected device type independently of the report length.