CVE-2025-37870: linux kernel — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: prevent hang on link training fail [Why] When link training fails, the phy clock will be disabled. However, in enable_streams, it is assumed that link training succeeded and the mux selects the phy clock, causing a hang when a register write is made. [How] When enable_stream is hit, check if link training failed. If it did, fall back to the ref clock to avoid a hang and keep the system in a recoverable state.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.3 — 6.12.25
linux	linux_kernel	6.13 — 6.14.4

References

Advisories & Patches

https://git.kernel.org/stable/c/0363c03672cd3191f037905bf981eb523a3b71b1 https://git.kernel.org/stable/c/04bf4f2a497e9877c425c5124652e61fb8a1a0aa https://git.kernel.org/stable/c/8058061ed9d6bc259d1e678607b07d259342c08f

Frequently Asked Questions

What is CVE-2025-37870? +

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: prevent hang on link training fail [Why] When link training fails, the phy clock will be disabled. However, in enable_streams, it is assumed that link training succeeded and the mux selects the phy clock, causing a hang when a register write is made. [How] When enable_stream is hit, check if link training failed. If it did, fall back to the ref clock to avoid a hang and keep the system in a recoverable state. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-37870? +

CVE-2025-37870 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-37870? +

CVE-2025-37870 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-37870? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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