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CVE-2026-74397

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: IB/mlx5: Fix transport-domain rollback and initialize lb mutex earlier mlx5_ib_alloc_transport_domain() allocates a transport d…

Published Aug 15, 2026EPSS 0.18%

Overview

CVE-2026-74397 is a high-severity vulnerability. It was published on August 15, 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:

IB/mlx5: Fix transport-domain rollback and initialize lb mutex earlier

mlx5_ib_alloc_transport_domain() allocates a transport domain and then

may fail in mlx5_ib_enable_lb(). In that case, the allocated TD is leaked.

Fix this by deallocating the TD when mlx5_ib_enable_lb() returns an

error. Also return 0 explicitly in the no-loopback-capability success

branch, and move dev->lb.mutex initialization to mlx5_ib_stage_init_init().

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/2c3b2667dad69d56774b79db763acb3a1bee0fc0Refgit.kernel.org/stable/c/37fc3cc0f924fd8d0f0cf87b92672dec75a32e57Refgit.kernel.org/stable/c/65e344925fa30abf50c8de8c150b397715fa2066Refgit.kernel.org/stable/c/e79389115b9d27287ff6230a9750675106ed7668Refgit.kernel.org/stable/c/f88e12c95fc19f719e06ca1e9eb20fdad68ef61a

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74397?

CVE-2026-74397 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-74397?

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-2026-74397?

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-2026-74397?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74397 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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