CVE-2024-50123 bpf: Add the missing BPF_LINK_TYPE invocation for sockmap

What is CVE-2024-50123?

CVE-2024-50123 is a high-severity vulnerability in Linux kernel, published on 5 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:

bpf: Add the missing BPF_LINK_TYPE invocation for sockmap

There is an out-of-bounds read in bpf_link_show_fdinfo() for the sockmap link fd. Fix it by adding the missing BPF_LINK_TYPE invocation for sockmap link

Also add comments for bpf_link_type to prevent missing updates in the future.

Weakness: CWE-125

Which versions are affected by CVE-2024-50123?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-50123?

Apply the vendor's patch.

Is CVE-2024-50123 being exploited?

There is no known exploitation of CVE-2024-50123 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-2024-50123, DEBIAN-CVE-2024-50123, GHSA-m9gh-794q-vjjj, UBUNTU-CVE-2024-50123.