CVE-2023-52984 net: phy: dp83822: Fix null pointer access on DP83825/DP83826 devices

What is CVE-2023-52984?

CVE-2023-52984 is a medium-severity vulnerability in Linux kernel, published on 27 Mar 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:

net: phy: dp83822: Fix null pointer access on DP83825/DP83826 devices

The probe() function is only used for the DP83822 PHY, leaving the private data pointer uninitialized for the smaller DP83825/26 models. While all uses of the private data structure are hidden in 82822 specific callbacks, configuring the interrupt is shared across all models. This causes a NULL pointer dereference on the smaller PHYs as it accesses the private data unchecked. Verifying the pointer avoids that.

Weakness: CWE-476

Which versions are affected by CVE-2023-52984?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-52984?

Apply the vendor's patch.

Is CVE-2023-52984 being exploited?

There is no known exploitation of CVE-2023-52984 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 BELL-CVE-2023-52984, DEBIAN-CVE-2023-52984, GHSA-7r4r-7wg2-96vj, UBUNTU-CVE-2023-52984.