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CVE-2025-39806 is an out-of-bounds read in the Linux kernel HID multitouch driver’s mt_report_fixup() function. When processing a HID report descriptor, the function accesses and may patch byte offset 607 without first verifying that the descriptor contains at least 608 bytes. A malicious HID device can supply an undersized descriptor and cause a slab out-of-bounds access during HID report parsing and device probing. The fix validates that the descriptor length is at least 608 bytes before accessing offset 607.
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A Linux kernel HID multitouch slab out-of-bounds access vulnerability in mt_report_fixup().
A Linux kernel vulnerability in the HID multitouch component involving a slab out-of-bounds access in mt_report_fixup().
A Linux kernel vulnerability in the HID multitouch component involving a slab out-of-bounds access in mt_report_fixup().
A Linux kernel HID multitouch slab out-of-bounds access vulnerability in mt_report_fixup() that can be triggered by a malicious HID device supplying an undersized report descriptor, due to missing bounds checks before accessing byte offset 607.
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Cross-references every affected SKU, including bundled OEM variants.
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