What’s Vulnerable › Vulnerabilities

CVE-2026-80568: Input: synaptics-rmi4 - block s_input when F54 queue is busy

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-26 · updated 2026-08-27

Description

In the Linux kernel, the following vulnerability has been resolved: Input: synaptics-rmi4 - block s_input when F54 queue is busy Changing the input (diagnostic report type) mid-stream changes the report size. Since V4L2 buffers are allocated based on the size at stream start, changing the input while streaming could lead to a heap buffer overflow if the new size is larger than the allocated buffers. Prevent this by blocking VIDIOC_S_INPUT with -EBUSY if the V4L2 queue is busy (streaming).

Affected products

• Linux kernel: 4.9 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1d718f1461766e9f00a8dbeb4f13f1b1c19d90ac
• https://git.kernel.org/stable/c/493ba8e794729649689438edba72337111303cc4
• https://git.kernel.org/stable/c/7e994a9ecc0b49ad2fe63da9c92a8aca8a6614af
• https://git.kernel.org/stable/c/cae79513f9115c350561b16f36adcb47c9bfff12
• https://git.kernel.org/stable/c/ddd9a53faf3b65e5920cb802cb1db6f4615bdfef
• https://git.kernel.org/stable/c/fa69f93015becf3729716de2199b58540aa99672
• https://git.kernel.org/stable/c/fbfd76746adc16d64be29ff113f673b70bc3f5c2
• https://git.kernel.org/stable/c/ff0849705d29277fd1f6fc6596674b9308724fb2

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