Memory Handling Flaw in Linux Kernel's RDMA EFA Implementation

CVE-2026-31493

What is CVE-2026-31493?

A memory handling flaw has been identified in the Linux Kernel's RDMA EFA implementation. When an admin command encounters an error, the completion context is accessed after it has already been freed. This can lead to undefined behavior as the data from the context may reference memory that has been reused, potentially compromising system stability and security. A modification in the admin submission flow ensures that memory allocation and deallocation processes are symmetric, preventing the premature freeing of the context before its actual use.

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