CVE-2025-39680

i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i2c_smbus_xfer

State: Published
Severity: 7.8 High
Published: Sep 5, 2025
Updated: Aug 5, 2026
Reserved: Apr 16, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i2c_smbus_xfer

The data->block[0] variable comes from user. Without proper check, the variable may be very large to cause an out-of-bounds bug.

Fix this bug by checking the value of data->block[0] first.

1. commit 39244cc75482 ("i2c: ismt: Fix an out-of-bounds bug in ismt_access()") 2. commit 92fbb6d1296f ("i2c: xgene-slimpro: Fix out-of-bounds bug in xgene_slimpro_i2c_xfer()")

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	c366be720235301fdadf67e6f1ea6ff32669c074 to before 071e43fcba5ddd9a7813e6cc0aa10299eae41b21Affected c366be720235301fdadf67e6f1ea6ff32669c074 to before 57f312b955938fc4663f430cb57a71f2414f601bAffected
LinuxLinux	6.13Affected before 6.13Not affected 6.16.4 through 6.16.*Not affected 6.17 and laterNot affected

References

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