CVE-2024-38566 bpf: Fix verifier assumptions about socket->sk

What is CVE-2024-38566?

CVE-2024-38566 is a medium-severity vulnerability in Linux kernel, published on 19 Jun 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: Fix verifier assumptions about socket->sk

The verifier assumes that 'sk' field in 'struct socket' is valid and non-NULL when 'socket' pointer itself is trusted and non-NULL. That may not be the case when socket was just created and passed to LSM socket_accept hook. Fix this verifier assumption and adjust tests.

Which versions are affected by CVE-2024-38566?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-38566?

Apply the vendor's patch.

Is CVE-2024-38566 being exploited?

There is no known exploitation of CVE-2024-38566 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-2024-38566, DEBIAN-CVE-2024-38566, GHSA-95cm-jx47-9cpv, UBUNTU-CVE-2024-38566.