CVE-2026-92488 RDMA/erdma: complete object teardown when the destroy command fails
A failure in RDMA object destruction leaks resources, potentially leading to resource exhaustion and denial of service in the Linux kernel.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-92488?
CVE-2026-92488 is a high-severity denial of service vulnerability in Linux, published on 17 Sep 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/erdma: complete object teardown when the destroy command fails
erdma_destroy_qp(), erdma_destroy_cq(), erdma_dereg_mr(), and erdma_destroy_ah() returned early when erdma_post_cmd_wait() failed, leaking the queue buffers, MTTs, doorbells and the STAG, QPN, CQN and AHN identifiers. A command timeout clears ERDMA_CMDQ_STATE_OK_BIT and permanently disables the command queue, so no retry can succeed; the RDMA core keeps the object after a failed destructor and forced uverbs cleanup then nulls the pointers, making the resources unreachable.
Warn on failure but release every software-owned resource and return success, since during terminal destruction the hardware command result is only diagnostic.
Which versions are affected by CVE-2026-92488?
How do I fix CVE-2026-92488?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-92488 being exploited?
There is no known exploitation of CVE-2026-92488 in the wild and no public exploit code.
Sources
Also known as AZL-102408, BELL-CVE-2026-92488, DEBIAN-CVE-2026-92488, GHSA-rcjj-6j56-f2wh, UBUNTU-CVE-2026-92488.