CVE-2026-31627

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.

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CVSS v3.1 Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0001

Probability of exploitation

0.03%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Affected Products

Vendor	Product	Versions
linux	linux_kernel	3.10.1 — 6.6.136
linux	linux_kernel	6.7 — 6.12.83
linux	linux_kernel	6.13 — 6.18.24
linux	linux_kernel	6.19 — 6.19.14
linux	linux_kernel	7.0 — 7.0.1
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/377fae22a137b6b89f3f32399a58c52cf2325416 https://git.kernel.org/stable/c/71b3c316b22c555d2769126a92b1244b15a9750d 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

Frequently Asked Questions

What is CVE-2026-31627? +

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. It has a CVSS v3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-31627? +

CVE-2026-31627 has a CVSS v3.1 score of 7.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0001, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-31627? +

CVE-2026-31627 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-31627? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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