CVE-2025-37870: Linux kernel · drm/amd/display: prevent hang on link training fail
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium.
Data as of 26 Oct 2026, 16:39 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 9 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=questingOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-6.11pkg:deb/ubuntu/linux-azure-6.11?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
An official fix is available and included in updated Linux kernel releases. Users should apply the security updates provided by their Linux distribution, such as the Ubuntu security notice USN-7594-1 dated 24 June 2025, which addresses this and other kernel vulnerabilities.
Description
A vulnerability in the Linux kernel's AMD GPU driver (drm/amd/display) could cause a system hang during link training failure due to improper clock selection. The issue occurs because the code assumes link training succeeded and selects the PHY clock, which is disabled on failure, leading to a hang. This has been fixed by checking the link training status and falling back to a reference clock to maintain system stability.
References
- ubuntu.com/security/CVE-2025-37870 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-37870 (opens in a new tab)
- git.kernel.org/linus/8058061ed9d6bc259d1e678607b07d259342c08f (opens in a new tab)
- git.kernel.org/stable/c/0363c03672cd3191f037905bf981eb523a3b71b1 (opens in a new tab)
- git.kernel.org/stable/c/04bf4f2a497e9877c425c5124652e61fb8a1a0aa (opens in a new tab)
- git.kernel.org/stable/c/8058061ed9d6bc259d1e678607b07d259342c08f (opens in a new tab)
- ubuntu.com/security/notices/USN-7594-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-7594-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-7594-3 (opens in a new tab)