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CVE-2026-46234

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: vsock: fix buffer size clamping order In vsock_update_buffer_size(), the buffer size was being clamped to the maximum first, an…

Published May 28, 2026CWE-787EPSS 0.18%

Overview

CVE-2026-46234 is a high-severity vulnerability. It was published on May 28, 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:

vsock: fix buffer size clamping order

In vsock_update_buffer_size(), the buffer size was being clamped to the

maximum first, and then to the minimum. If a user sets a minimum buffer

size larger than the maximum, the minimum check overrides the maximum

check, inverting the constraint.

This breaks the intended socket memory boundaries by allowing the

vsk->buffer_size to grow beyond the configured vsk->buffer_max_size.

Fix this by checking the minimum first, and then the maximum. This

ensures the buffer size never exceeds the buffer_max_size.

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/01ef69785dc3162f588a361ab770b1e312800188Refgit.kernel.org/stable/c/0b68881501460c3761f196469e1e503218c5e536Refgit.kernel.org/stable/c/2602f7bb5818e92315feeaeb71d8ce4d5c9ab160Refgit.kernel.org/stable/c/310da27932dd0afe7ce7456dfe1f0814c3301f41Refgit.kernel.org/stable/c/a998a7e250bf976539e05a00ec64a81292afecaaRefgit.kernel.org/stable/c/caf11dfea5233a69298a1c448bbf8d1639c80536Refgit.kernel.org/stable/c/d114bfdc9b76bf93b881e195b7ec957c14227babRefgit.kernel.org/stable/c/f6ec135941d2c1c2dbb87b5ce1783f4f6ac6ccca

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46234?

CVE-2026-46234 is a high-severity vulnerability. It was published on May 28, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-46234?

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-2026-46234?

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-2026-46234?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46234 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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