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CVE-2026-64522

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA mlx5e_xfrm_add_state() handles acquire-flow temporary SAs by al…

Published Jul 25, 2026EPSS 0.51%

Overview

CVE-2026-64522 is a high-severity vulnerability. It was published on July 25, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

net/mlx5e: Fix eswitch mode block underflow on IPsec acquire SA

mlx5e_xfrm_add_state() handles acquire-flow temporary SAs by allocating

software state and skipping hardware offload setup.

That path jumps to the common success label before taking the eswitch mode

block. After tunnel-mode validation was moved earlier, the common success

label unconditionally calls mlx5_eswitch_unblock_mode(). For acquire SAs,

this decrements esw->offloads.num_block_mode without a matching increment.

Return directly after installing the acquire SA offload handle, so only the

paths that successfully called mlx5_eswitch_block_mode() call the matching

unblock.

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/abe003b33223ff33552f291644bf35d9c2f992fbRefgit.kernel.org/stable/c/b5bd4249e430f5963d559708ee96a671716d2400Refgit.kernel.org/stable/c/ecafd8284e527666e83261e6e57a7c7341d591cb

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64522?

CVE-2026-64522 is a high-severity vulnerability. It was published on July 25, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-64522?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-64522?

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-2026-64522?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64522 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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