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Tracker / CVE-2026-31624

CVE-2026-31624

Media 5.5

In the Linux kernel, the following vulnerability has been resolved: HID: core: clamp report_size in s32ton() to avoid undefined shift s32ton() shifts by n-1 where n is the field's report_size, a value that comes directly from a HID device. The HID parser bounds report_size only to <= 256, so a broken HID device can supply a report descriptor with a wide field that triggers shift exponents up to 256 on a 32-bit type when an output report is built via hid_output_field() or hid_set_field(). Commit ec61b41918587 ("HID: core: fix shift-out-of-bounds in hid_report_raw_event") added the same n > 32 clamp to the function snto32(), but s32ton() was never given the same fix as I guess syzbot hadn't figured out how to fuzz a device the same way. Fix this up by just clamping the max value of n, just like snto32() does.

Prodotti e versioni affette

linux linux_kernel
linux linux_kernel · 2.6.20.1 → 6.6.136
linux linux_kernel · 6.13 → 6.18.24
linux linux_kernel · 6.19 → 6.19.14
linux linux_kernel · 6.7 → 6.12.83
linux linux_kernel · 7.0 → 7.0.1

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