CVE-2024-56689 PCI: endpoint: epf-mhi: Avoid NULL dereference if DT lacks 'mmio'

What is CVE-2024-56689?

CVE-2024-56689 is a medium-severity vulnerability in Linux kernel, published on 28 Dec 2024. 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: endpoint: epf-mhi: Avoid NULL dereference if DT lacks 'mmio'

If platform_get_resource_byname() fails and returns NULL because DT lacks an 'mmio' property for the MHI endpoint, dereferencing res->start will cause a NULL pointer access. Add a check to prevent it.

[kwilczynski: error message update per the review feedback] [bhelgaas: commit log]

Weakness: CWE-476

Which versions are affected by CVE-2024-56689?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-56689?

Apply the vendor's patch.

Is CVE-2024-56689 being exploited?

There is no known exploitation of CVE-2024-56689 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-55153, BELL-CVE-2024-56689, DEBIAN-CVE-2024-56689, GHSA-q94m-6jg9-pcmh, UBUNTU-CVE-2024-56689.