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CVE-2026-92508

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Fix potential use after free in ib_free_cq() When accessing a CQ via the netlink path the only synchronization mecha…

Published Sep 17, 2026EPSS 0.16%

Overview

CVE-2026-92508 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

RDMA/core: Fix potential use after free in ib_free_cq()

When accessing a CQ via the netlink path the only synchronization

mechanism for the said CQ is rdma_restrack_get().

Currently, rdma_restrack_del() is invoked at the end of

ib_free_cq(), which is too late, since by that point

vendor-specific resources associated with the CQ might already be

freed. This can leave a short window where the CQ remains accessible

through restrack, leading to a potential use-after-free.

Fix this by moving the rdma_restrack_del() call to be before the freeing

of the vendor-specific resources ensuring that the CQ is removed from

restrack before its internal resources are released.

This guarantees that no new users hold references to a CQ that is in

the process of destruction.

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

Refgit.kernel.org/stable/c/29dc2f8e1c97372c2871a70088707933515fbd5bRefgit.kernel.org/stable/c/43403fe45379c64fa6276e5a8ede44493e5d2d3dRefgit.kernel.org/stable/c/76f2cb4f721815c3b6262a6dc2151de88646924cRefgit.kernel.org/stable/c/91f8a17a22ab615a03743120e19935e731f28fb9Refgit.kernel.org/stable/c/9abea37942534eeb049335476178696b654b000cRefgit.kernel.org/stable/c/a804b162f9bc2b38b2ed1b4752eea9faadb1645bRefgit.kernel.org/stable/c/b8dcca427096fc9c50f1b376847fea72bc842d31

How CyberStrike helps

Frequently asked questions

What is CVE-2026-92508?

CVE-2026-92508 is a high-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-92508?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-92508?

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.

How can CyberStrike help with CVE-2026-92508?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-92508 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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