# CVE-2023-54065: linux: In the Linux kernel, the following vulnerability has been resolved:  net: dsa: realtek: fix out-of-bounds access  The...

CVE-2023-54065 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-54065, released December 24, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2023-54065
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 24, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  net: dsa: realtek: fix out-of-bounds access  The probe function sets priv->chip_data to (void *)priv + sizeof(*priv) with the expectation that priv has enough trailing space.  However, only realtek-smi actually allocated this chip_data space. Do likewise in realtek-mdio to fix out-of-bounds accesses.  These accesses likely went unnoticed so far, because of an (unused) buf[4096] member in struct realtek_priv, which caused kmalloc to round up the allocated buffer to a big enough size, so nothing of value was overwritten. With a different allocator (like in the barebox bootloader port of the driver) or with KASAN, the memory corruption becomes quickly apparent.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.25-1 | [DEBIAN-CVE-2023-54065](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54065.md) | Dec 24, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.1.25-1 | [DEBIAN-CVE-2023-54065](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54065.md) | Dec 24, 2025 |
| Linux | linux Debian 14 | 6.1.25-1 | [DEBIAN-CVE-2023-54065](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54065.md) | Dec 24, 2025 |

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