CVE-2026-74299

Technical Description

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

RDMA/core: Fix FRMR aging push to queue error flow

Aging pools with pinned handles requires moving handles from the

active queue to a non-empty inactive queue that might fail on new page

allocation, we are currently not handling the fault and leaking any mkey

that fails the push.

Fix by Introducing push_queue_to_queue_locked() that fills the

destination's partial tail page from the source and then splices the

remaining source pages onto the destination, performing no allocation.

Replace the per-handle move loop in age_pinned_pool() and the

open-coded splice in pool_aging_work() with calls to the helper.

As the helper cannot fail under memory pressure, removing a class of

GFP_ATOMIC allocations under the pool lock and simplifying the error

flow.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References