What’s Vulnerable › Vulnerabilities

CVE-2025-37836: PCI: Fix reference leak in pci_register_host_bridge()

• 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 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: PCI: Fix reference leak in pci_register_host_bridge() If device_register() fails, call put_device() to give up the reference to avoid a memory leak, per the comment at device_register(). Found by code review. [bhelgaas: squash Dan Carpenter's double free fix from https://lore.kernel.org/r/db806a6c-a91b-4e5a-a84b-6b7e01bdac85@stanley.mountain]

Affected products

• Debian Linux: 11.0
• Linux kernel: from 4.10 before 5.10.237; from 5.11 before 5.15.181; from 5.16 before 6.1.136; from 6.2 before 6.6.89; from 6.7 before 6.12.24; from 6.13 before 6.13.12 — fixed in 5.10.237, 5.15.181, 6.1.136, 6.12.24, 6.13.12, 6.14.3

How to fix

Upgrade to a fixed version: Linux kernel 5.10.237, 5.15.181, 6.1.136, 6.12.24. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3297497ad2246eb9243849bfbbc57a0dea97d76e
• https://git.kernel.org/stable/c/804443c1f27883926de94c849d91f5b7d7d696e9
• https://git.kernel.org/stable/c/9707d0c932f41006a2701afc926b232b50e356b4
• https://git.kernel.org/stable/c/b783478e0c53ffb4f04f25fb4e21ef7f482b05df
• https://git.kernel.org/stable/c/bbba4c50a2d2a1d3f3bf31cc4b8280cb492bf2c7
• https://git.kernel.org/stable/c/bd2a352a0d72575f1842d28c14c10089f0cfe1ae
• https://git.kernel.org/stable/c/f4db1b2c9ae3d013733c302ee70cac943b7070c0
• https://git.kernel.org/stable/c/f9208aec86226524ec1cb68a09ac70e974ea6536
• https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
• https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

Get alerted when CVE-2025-37836 or the next vulnerability affects your stack