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CVE-2026-31612

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate EaNameLength in smb2_get_ea() smb2_get_ea() reads ea_req->EaNameLength from the client request and passes it di…

Published Apr 24, 2026EPSS 0.58%

Overview

CVE-2026-31612 is a high-severity vulnerability. It was published on April 24, 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:

ksmbd: validate EaNameLength in smb2_get_ea()

smb2_get_ea() reads ea_req->EaNameLength from the client request and

passes it directly to strncmp() as the comparison length without

verifying that the length of the name really is the size of the input

buffer received.

Fix this up by properly checking the size of the name based on the value

received and the overall size of the request, to prevent a later

strncmp() call to use the length as a "trusted" size of the buffer.

Without this check, uninitialized heap values might be slowly leaked to

the client.

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/243b206bcb5a7137e8bddd57b2eec81e1ebd3859Refgit.kernel.org/stable/c/3363a770b193f555f29d76ddf4ced3305c0ccf6dRefgit.kernel.org/stable/c/4b73376feecb3b61172fe5b4ff42bbbb8531669dRefgit.kernel.org/stable/c/551dfb15b182abad4600eaf7b37e6eb7000d5b1bRefgit.kernel.org/stable/c/66751841212c2cc196577453c37f7774ff363f02Refgit.kernel.org/stable/c/859f11e1bc81a4d32bb3ceeae54bcd296ac675d3Refgit.kernel.org/stable/c/dfc6878d14acafffbe670bf2576620757a10a3d8

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31612?

CVE-2026-31612 is a high-severity vulnerability. It was published on April 24, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-31612?

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-2026-31612?

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-2026-31612?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31612 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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