Linux Kernel RDMA Vulnerability in SRPT Allocation

CVE-2026-100075

What is CVE-2026-100075?

A vulnerability in the Linux kernel's RDMA subsystem relates to improper handling during the allocation of read/write contexts in the srpt_alloc_rw_ctxs() function. When an error occurs during the allocation, existing RDMA contexts are destroyed, but stale values for n_rw_ctx and n_rdma remain, leading to incorrect accounting in subsequent operations. This can result in an invalid calculation of send queue credits, potentially impairing system performance and compromising data integrity. The issue has been resolved by ensuring that the counters are reset and memory pointers are cleared before returning any errors, thereby enhancing the stability and reliability of RDMA operations.

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