CVE-2022-49875 bpftool: Fix NULL pointer dereference when pin {PROG, MAP, LINK} without FILE

What is CVE-2022-49875?

CVE-2022-49875 is a medium-severity vulnerability in Linux kernel, published on 1 May 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:

bpftool: Fix NULL pointer dereference when pin {PROG, MAP, LINK} without FILE

When using bpftool to pin {PROG, MAP, LINK} without FILE, segmentation fault will occur. The reson is that the lack of FILE will cause strlen to trigger NULL pointer dereference. The corresponding stacktrace is shown below:

do_pin do_pin_any do_pin_fd mount_bpffs_for_pin strlen(name) <- NULL pointer dereference

Fix it by adding validation to the common process.

Weakness: CWE-476

Which versions are affected by CVE-2022-49875?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-49875?

Apply the vendor's patch.

Is CVE-2022-49875 being exploited?

There is no known exploitation of CVE-2022-49875 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 DEBIAN-CVE-2022-49875, GHSA-c8r4-j2q4-mjgj, UBUNTU-CVE-2022-49875.