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CVE-2026-46037

8.2 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ipv4: icmp: validate reply type before using icmp_pointers Extended echo replies use ICMP_EXT_ECHOREPLY as the outbound reply t…

Published May 27, 2026EPSS 0.73%

Overview

CVE-2026-46037 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, 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:

ipv4: icmp: validate reply type before using icmp_pointers

Extended echo replies use ICMP_EXT_ECHOREPLY as the outbound reply type.

That value is outside the range covered by icmp_pointers[], which only

describes the traditional ICMP types up to NR_ICMP_TYPES.

Avoid consulting icmp_pointers[] for reply types outside that range, and

use array_index_nospec() for the remaining in-range lookup. Normal ICMP

replies keep their existing behavior unchanged.

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/67bf002a2d7387a6312138210d0bd06e3cf4879bRefgit.kernel.org/stable/c/92e7c209036dcc0e8ffdf806fdfd3645b263bea5Refgit.kernel.org/stable/c/93df2af4f491de33827550b9d420f01808c0706bRefgit.kernel.org/stable/c/b3a88fc5ae024d43c5ecf653f3bbe837e4a6dc99Refgit.kernel.org/stable/c/bc64a66e0b9ad937d3d49934242ee62b01ba9a94Refgit.kernel.org/stable/c/c2178ff1c70ebfc2ab9651b230c58a34683db759Refgit.kernel.org/stable/c/d700c34a5d186b9ba0715bcb19e0ff80ffbfbfc1

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46037?

CVE-2026-46037 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-46037?

This vulnerability has a CVSS 3.1 base score of 8.2, 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-2026-46037?

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-2026-46037?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46037 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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