Linux kernel i2c SMBUS sizeverify vulnerability
CVE-2026-31627 Published on April 24, 2026
i2c: s3c24xx: check the size of the SMBUS message before using it
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.
Products Associated with CVE-2026-31627
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Affected Versions
Linux:- Version 85747311ecb6167c989093c64a13807366fdd3a9 and below d87d5620125a03b1eadbd5df39748215d3db7ddb is affected.
- Version 85747311ecb6167c989093c64a13807366fdd3a9 and below 377fae22a137b6b89f3f32399a58c52cf2325416 is affected.
- Version 85747311ecb6167c989093c64a13807366fdd3a9 and below 71b3c316b22c555d2769126a92b1244b15a9750d is affected.
- Version 85747311ecb6167c989093c64a13807366fdd3a9 and below aaaaec39ddbcd06770dca7f1adebc3b1242ebe7b is affected.
- Version 3.10 is affected.
- Before 3.10 is unaffected.
- Version 6.12.83, <= 6.12.* is unaffected.
- Version 6.18.24, <= 6.18.* is unaffected.
- Version 6.19.14, <= 6.19.* is unaffected.
- Version 7.0.1, <= 7.0.* is unaffected.