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CVE-2026-46027

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net/smc: avoid early lgr access in smc_clc_wait_msg A CLC decline can be received while the handshake is still in an early stag…

Published May 27, 2026EPSS 0.72%

Overview

CVE-2026-46027 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, 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/smc: avoid early lgr access in smc_clc_wait_msg

A CLC decline can be received while the handshake is still in an early

stage, before the connection has been associated with a link group.

The decline handling in smc_clc_wait_msg() updates link-group level sync

state for first-contact declines, but that state only exists after link

group setup has completed. Guard the link-group update accordingly and

keep the per-socket peer diagnosis handling unchanged.

This preserves the existing sync_err handling for established link-group

contexts and avoids touching link-group state before it is available.

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/22546729b96fc873b23065dc49e3d73c45cfb874Refgit.kernel.org/stable/c/257cdf0c5ced9c0fba8aba501d94b0a5fcef2086Refgit.kernel.org/stable/c/5a8db80f721deee8e916c2cfdee78decda02ce4fRefgit.kernel.org/stable/c/5eedbfd82c2884e0010fdfb3c9446a6ebcadb691Refgit.kernel.org/stable/c/6180a296ca65b08a81914805cbc0f78da5f10a1fRefgit.kernel.org/stable/c/83bcf9228b0501694fb2589ed1d142855a2887f2Refgit.kernel.org/stable/c/ea0b5d0fe96356dce38f98375a57c52a04e13712Refgit.kernel.org/stable/c/f0858e1d5624bb120b198f2a8528f97a9b0ae069

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46027?

CVE-2026-46027 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-46027?

This vulnerability has a CVSS 3.1 base score of 7.5, 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-2026-46027?

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-2026-46027?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46027 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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