CVE-2025-38514 rxrpc: Fix oops due to non-existence of prealloc backlog struct

What is CVE-2025-38514?

CVE-2025-38514 is a high-severity vulnerability in Debian Debian Linux, published on 16 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

rxrpc: Fix oops due to non-existence of prealloc backlog struct

If an AF_RXRPC service socket is opened and bound, but calls are preallocated, then rxrpc_alloc_incoming_call() will oops because the rxrpc_backlog struct doesn't get allocated until the first preallocation is made.

Fix this by returning NULL from rxrpc_alloc_incoming_call() if there is no backlog struct. This will cause the incoming call to be aborted.

Which versions are affected by CVE-2025-38514?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2025-38514?

Apply the vendor's patch.

Is CVE-2025-38514 being exploited?

There is no known exploitation of CVE-2025-38514 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 AZL-66386, AZL-75087, BELL-CVE-2025-38514, DEBIAN-CVE-2025-38514, GHSA-vc22-mx78-4mgj, ROOT-OS-DEBIAN-11-CVE-2025-38514 and 4 more.