Bug 2461439 (CVE-2026-31627) - CVE-2026-31627 kernel: Linux kernel: i2c s3c24xx driver arbitrary code execution via SMBUS message size validation flaw
Summary: CVE-2026-31627 kernel: Linux kernel: i2c s3c24xx driver arbitrary code execut...
Keywords:
Status: NEW
Alias: CVE-2026-31627
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-24 15:01 UTC by OSIDB Bzimport
Modified: 2026-08-13 14:32 UTC (History)
2 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-04-24 15:01:34 UTC 
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.
Comment 1 Keith Grant 2026-04-24 20:36:35 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026042427-CVE-2026-31627-bd9b@gregkh/T
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