What’s Vulnerable › Vulnerabilities

CVE-2026-31627: i2c: s3c24xx: check the size of the SMBUS message before using it

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-24 · updated 2026-06-17

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.

Affected products

• Linux kernel: from 3.10.1 before 6.6.136; from 6.7 before 6.12.83; from 6.13 before 6.18.24; from 6.19 before 6.19.14; from 7.0 before 7.0.1; 3.10 — fixed in 6.12.83, 6.18.24, 6.19.14, 6.6.136, 7.0.1

How to fix

Upgrade to a fixed version: Linux kernel 6.12.83, 6.18.24, 6.19.14, 6.6.136. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2d262da4bca6fab96e2e709feb95b31b0a9a03a7
• https://git.kernel.org/stable/c/377fae22a137b6b89f3f32399a58c52cf2325416
• https://git.kernel.org/stable/c/71b3c316b22c555d2769126a92b1244b15a9750d
• https://git.kernel.org/stable/c/8f756a5964396da0fc9e0db33253a5b85dbbcbb6
• https://git.kernel.org/stable/c/aaaaec39ddbcd06770dca7f1adebc3b1242ebe7b
• https://git.kernel.org/stable/c/c0128c7157d639a931353ea344fb44aad6d6e17a
• https://git.kernel.org/stable/c/d87d5620125a03b1eadbd5df39748215d3db7ddb
• https://git.kernel.org/stable/c/fa00738ab30b07db1a43b9c85fc56b8cc3b7d197
• https://git.kernel.org/stable/c/fd1650da24ed54c716aa9b69e9bbd8a662e492da

Get alerted when CVE-2026-31627 or the next vulnerability affects your stack