# CVE-2025-39680: linux: In the Linux kernel, the following vulnerability has been resolved:  i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i...

CVE-2025-39680 is fixed in linux on 1 platform by DEBIAN-CVE-2025-39680 (version 6.16.5-1), released September 5, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-39680
- Priority: High
- CVSS: 7.1 (high)
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 5, 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()")

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 6.16.5-1 | [DEBIAN-CVE-2025-39680](https://patchblox.com/security/data/fix/linux/debian-cve-2025-39680.md) | Sep 5, 2025 |

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