CVE-2024-26734 devlink: fix possible use-after-free and memory leaks in devlink_init()

What is CVE-2024-26734?

CVE-2024-26734 is a high-severity use after free vulnerability in Linux kernel, published on 3 Apr 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:

devlink: fix possible use-after-free and memory leaks in devlink_init()

The pernet operations structure for the subsystem must be registered before registering the generic netlink family.

Make an unregister in case of unsuccessful registration.

Weakness: CWE-416, CWE-401

Which versions are affected by CVE-2024-26734?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-26734?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2024-26734 being exploited?

There is no known exploitation of CVE-2024-26734 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-2024-26734, DEBIAN-CVE-2024-26734, GHSA-84hw-www5-5v7p, UBUNTU-CVE-2024-26734.