CVE-2026-80569 Affecting linux-6.12 package, versions <6.12.107-1~deb12u1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.12% (3rd percentile)

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  • Snyk IDSNYK-ECHOLATEST-LINUX612-19964395
  • published20 Sept 2026
  • disclosed26 Aug 2026

Introduced: 26 Aug 2026

NewCVE-2026-80569  (opens in a new tab)

How to fix?

Upgrade Echo:latest linux-6.12 to version 6.12.107-1~deb12u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-6.12 package and not the linux-6.12 package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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

Input: synaptics-rmi4 - bound the F54 report size to the allocated buffer

rmi_f54_work() reads a diagnostics report from the device into f54->report_data, sizing the transfer with rmi_f54_get_report_size():

report_size = rmi_f54_get_report_size(f54);
...
for (i = 0; i &lt; report_size; i += F54_REPORT_DATA_SIZE) {
    int size = min(F54_REPORT_DATA_SIZE, report_size - i);
    ...
    rmi_read_block(.., f54-&gt;report_data + i, size);
}

report_data is allocated once at probe from F54's own electrode counts (array3_size(f54->num_tx_electrodes, f54->num_rx_electrodes, sizeof(u16))), but rmi_f54_get_report_size() computes the size from drv_data->num_*_electrodes when those are set, i.e. from the F55 function's electrode counts. Both counts come straight from device queries (F54 and F55 each report up to 255 electrodes) and nothing constrains the F55 counts to the F54 ones.

A malicious or malfunctioning RMI4 device that reports larger F55 electrode counts than its F54 counts makes report_size exceed the allocation, so the read loop writes past report_data (and the V4L2 dequeue memcpy() then reads past it). On conforming hardware the F55 configured electrodes are a subset of the F54 physical electrodes, so report_size never exceeds the buffer and well-behaved devices are unaffected.

Record the allocation size and reject a report that does not fit, mirroring the existing zero-size check.

CVSS Base Scores

version 3.1