Bug 2502388 (CVE-2026-63947) - CVE-2026-63947 kernel: Bluetooth: HIDP: fix missing length checks in hidp_input_report()
Summary: CVE-2026-63947 kernel: Bluetooth: HIDP: fix missing length checks in hidp_inp...
Keywords:
Status: NEW
Alias: CVE-2026-63947
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-19 16:05 UTC by OSIDB Bzimport
Modified: 2026-07-21 22:09 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-19 16:05:29 UTC
In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: HIDP: fix missing length checks in hidp_input_report()

hidp_input_report() reads keyboard and mouse payload data from an skb
without first verifying that skb->len contains enough data.

hidp_recv_intr_frame() pulls the 1-byte HIDP header before dispatching
to hidp_input_report(). If a paired device sends a truncated packet,
the handler reads beyond the valid skb data, resulting in an
out-of-bounds read of skb data. The OOB bytes may be interpreted as
phantom key presses or spurious mouse movement.

Replace the open-coded length tracking and pointer arithmetic with
skb_pull_data() calls. skb_pull_data() returns NULL if the requested
bytes are not present, eliminating the need for a manual size variable
and the separate skb->len guard.


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