Linux Kernel RDMA/core age_pinned_pool/pool_aging_work allocation of resources

Summaryinfo

A vulnerability labeled as very critical has been found in Linux Kernel. Affected is the function age_pinned_pool/pool_aging_work of the component RDMA/core. The manipulation results in allocation of resources. This vulnerability is identified as CVE-2026-74299. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Linux Kernel (the affected version unknown). It has been classified as very critical. Affected is the function age_pinned_pool/pool_aging_work of the component RDMA/core. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2026-74299 since 08/15/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/15/2026). This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Applying the patch edf133d28fc43f7f8b0da43a8d5b93fdf8073d35/c6936506ed556ce3ccad36ab999baf2764dd7d25 is able to eliminate this problem.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

License

• open-source

Website

• Vendor: https://www.kernel.org/

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