CVE-2026-80570

Summary

In the Linux kernel, the following vulnerability has been resolved:

Input: synaptics-rmi4 - zero report size on F54 work error

In rmi_f54_work(), if an error occurs during report request or command verification, the code jumped directly to the 'error' label, bypassing the 'abort' label where f54->report_size was normally zeroed out.

This left f54->report_size containing its previous successful payload size. If a user then altered the V4L2 format to a smaller size, and a subsequent run failed, rmi_f54_buffer_queue() would copy the stale, larger payload size into the shrunken V4L2 buffer, causing a heap buffer overflow.

Fix this by merging the 'abort' and 'error' labels into a single 'out' exit path, and ensuring that f54->report_size is always set to 0 on failure by checking for error and zeroing the local report_size first.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/62079c17ec07d64362bec367ee7a525b0dbf6bf9
• https://git.kernel.org/stable/c/79521ed3cc9ea48476666ccacf45ecd6954b29a4
• https://git.kernel.org/stable/c/c669c64ab71afa7b467c4d7e18f6a05e96b97a1f
• https://git.kernel.org/stable/c/77749685e55da19b187df215b5da4080842ca5c7
• https://git.kernel.org/stable/c/c6cfda79f26c69e97db9805808c3b44d02227b4b
• https://git.kernel.org/stable/c/b28593a05afdd812b590e1045b5bd862a5869225
• https://git.kernel.org/stable/c/88c8174d72900d77fbdf2f527d54b6ff2da876a8
• https://git.kernel.org/stable/c/dc76c3c8e8ad09362b8c1561f3928288c15cba2e

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