CVE-2024-26872 RDMA/srpt: Do not register event handler until srpt device is fully setup

What is CVE-2024-26872?

CVE-2024-26872 is a high-severity use after free vulnerability in Debian Debian Linux, published on 17 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:

RDMA/srpt: Do not register event handler until srpt device is fully setup

Upon rare occasions, KASAN reports a use-after-free Write in srpt_refresh_port().

This seems to be because an event handler is registered before the srpt device is fully setup and a race condition upon error may leave a partially setup event handler in place.

Instead, only register the event handler after srpt device initialization is complete.

Weakness: CWE-416

Which versions are affected by CVE-2024-26872?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2024-26872?

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-2024-26872 being exploited?

There is no known exploitation of CVE-2024-26872 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2024-26872, DEBIAN-CVE-2024-26872, GHSA-xqvp-j58f-pjf5, UBUNTU-CVE-2024-26872.