CVE-2025-22095 PCI: brcmstb: Fix error path after a call to regulator_bulk_get()

Medium 5.5 Published Updated

A missing initialization in the Broadcom STB PCIe driver causes a kernel panic when regulator initialization fails, leading to denial of service.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Local or same network only
Victim action needed
Not needed
Fix
Available

What is CVE-2025-22095?

CVE-2025-22095 is a medium-severity vulnerability in Linux kernel, published on 16 Apr 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:

PCI: brcmstb: Fix error path after a call to regulator_bulk_get()

If the regulator_bulk_get() returns an error and no regulators are created, we need to set their number to zero.

If we don't do this and the PCIe link up fails, a call to the regulator_bulk_free() will result in a kernel panic.

While at it, print the error value, as we cannot return an error upwards as the kernel will WARN() on an error from add_bus().

[kwilczynski: commit log, use comma in the message to match style with other similar messages]

Which versions are affected by CVE-2025-22095?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-22095?

Apply the vendor's patch.

Is CVE-2025-22095 being exploited?

There is no known exploitation of CVE-2025-22095 in the wild and no public exploit code.

All Linux kernel vulnerabilities

Sources

Also known as BELL-CVE-2025-22095, DEBIAN-CVE-2025-22095, GHSA-6hqx-m227-83p9, ROOT-OS-UBUNTU-2404-CVE-2025-22095, UBUNTU-CVE-2025-22095.

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