CVE-2022-49962 xhci: Fix null pointer dereference in remove if xHC has only one roothub

What is CVE-2022-49962?

CVE-2022-49962 is a medium-severity vulnerability in Linux kernel, published on 18 Jun 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:

xhci: Fix null pointer dereference in remove if xHC has only one roothub

The remove path in xhci platform driver tries to remove and put both main and shared hcds even if only a main hcd exists (one roothub)

This causes a null pointer dereference in reboot for those controllers.

Check that the shared_hcd exists before trying to remove it.

Weakness: CWE-476

Which versions are affected by CVE-2022-49962?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-49962?

Apply the vendor's patch.

Is CVE-2022-49962 being exploited?

There is no known exploitation of CVE-2022-49962 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 DEBIAN-CVE-2022-49962, GHSA-7hw6-wgqh-2g44, UBUNTU-CVE-2022-49962.