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

What is CVE-2025-37870?

CVE-2025-37870 is a medium-severity denial of service vulnerability in Linux kernel, published on 9 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Which versions are affected by CVE-2025-37870?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-37870?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-37870 being exploited?

There is no known exploitation of CVE-2025-37870 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-62589, BELL-CVE-2025-37870, DEBIAN-CVE-2025-37870, GHSA-j36m-8cr4-5cq4, ROOT-OS-DEBIAN-11-CVE-2025-37870, ROOT-OS-DEBIAN-12-CVE-2025-37870 and 3 more.