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CVE-2026-31627

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: i2c: s3c24xx: check the size of the SMBUS message before using it The first byte of an i2c SMBUS message is the size, and it sh…

Published Apr 24, 2026EPSS 0.18%

Overview

CVE-2026-31627 is a high-severity vulnerability. It was published on April 24, 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:

i2c: s3c24xx: check the size of the SMBUS message before using it

The first byte of an i2c SMBUS message is the size, and it should be

verified to ensure that it is in the range of 0..I2C_SMBUS_BLOCK_MAX

before processing it.

This is the same logic that was added in commit a6e04f05ce0b ("i2c:

tegra: check msg length in SMBUS block read") to the i2c tegra driver.

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/2d262da4bca6fab96e2e709feb95b31b0a9a03a7Refgit.kernel.org/stable/c/377fae22a137b6b89f3f32399a58c52cf2325416Refgit.kernel.org/stable/c/71b3c316b22c555d2769126a92b1244b15a9750dRefgit.kernel.org/stable/c/8f756a5964396da0fc9e0db33253a5b85dbbcbb6Refgit.kernel.org/stable/c/aaaaec39ddbcd06770dca7f1adebc3b1242ebe7bRefgit.kernel.org/stable/c/c0128c7157d639a931353ea344fb44aad6d6e17aRefgit.kernel.org/stable/c/d87d5620125a03b1eadbd5df39748215d3db7ddbRefgit.kernel.org/stable/c/fa00738ab30b07db1a43b9c85fc56b8cc3b7d197Refgit.kernel.org/stable/c/fd1650da24ed54c716aa9b69e9bbd8a662e492da

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31627?

CVE-2026-31627 is a high-severity vulnerability. It was published on April 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-31627?

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-2026-31627?

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-2026-31627?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31627 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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