CVE-2026-74299 RDMA/core: Fix FRMR aging push to queue error flow
A memory leak in the Linux kernel RDMA core allows attackers to cause denial of service by triggering failures in FRMR aging queue operations.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74299?
CVE-2026-74299 is a memory corruption vulnerability in Linux, published on 15 Aug 2026. 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/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.
Which versions are affected by CVE-2026-74299?
How do I fix CVE-2026-74299?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-74299 being exploited?
There is no known exploitation of CVE-2026-74299 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-74299, GHSA-j69g-mrr3-p2qh, UBUNTU-CVE-2026-74299.