What’s Vulnerable › Vulnerabilities

CVE-2025-37870: drm/amd/display: prevent hang on link training fail

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-09 · updated 2026-10-21

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.

Affected products

• Linux kernel: from 6.3 before 6.12.25; from 6.13 before 6.14.4 — fixed in 6.12.25, 6.14.4

How to fix

Upgrade to a fixed version: Linux kernel 6.12.25, 6.14.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0363c03672cd3191f037905bf981eb523a3b71b1
• https://git.kernel.org/stable/c/04bf4f2a497e9877c425c5124652e61fb8a1a0aa
• https://git.kernel.org/stable/c/52cdc47cf6519e2912a34d29b7eeb3f10ca85efa
• https://git.kernel.org/stable/c/8058061ed9d6bc259d1e678607b07d259342c08f

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