CVE-2024-50188 net: phy: dp83869: fix memory corruption when enabling fiber

What is CVE-2024-50188?

CVE-2024-50188 is a high-severity memory corruption vulnerability in Linux kernel, published on 8 Nov 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:

net: phy: dp83869: fix memory corruption when enabling fiber

When configuring the fiber port, the DP83869 PHY driver incorrectly calls linkmode_set_bit() with a bit mask (1 << 10) rather than a bit number (10). This corrupts some other memory location -- in case of arm64 the priv pointer in the same structure.

Since the advertising flags are updated from supported at the end of the function the incorrect line isn't needed at all and can be removed.

Which versions are affected by CVE-2024-50188?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-50188?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2024-50188 being exploited?

There is no known exploitation of CVE-2024-50188 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-53729, BELL-CVE-2024-50188, DEBIAN-CVE-2024-50188, GHSA-8hmj-4h9r-668v, UBUNTU-CVE-2024-50188.