PT-2025-53063 · Linux+2 · Linux Kernel+3

Published 2023-03-24 · Updated 2025-12-27 · CVE-2023-54065

Positive Technologies (AI Summary)

CVSS v2.0

7.7

High

Base vector

AV:A/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A flaw exists in the Linux kernel’s networking component related to Realtek DSA drivers. Specifically, the issue involves an out-of-bounds access within the probe function when setting the chip data pointer. This occurs because the function expects sufficient trailing space in the priv structure, which is only allocated by realtek-smi. The realtek-mdio driver does not allocate this space, leading to potential memory corruption. The issue may have gone unnoticed in some environments due to the presence of an unused buffer within the realtek priv structure, which caused the memory allocator to round up the buffer size. However, different allocators or the use of Kernel Address Sanitizer (KASAN) can reveal the memory corruption. The vulnerable code involves setting the priv->chip data pointer to (void *)priv + sizeof(*priv).

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

BDU:2026-04227

CVE-2023-54065

Affected Products

Linux Kernel

Realtek Dsa Drivers

Realtek-Mdio

Realtek-Smi

References · 18

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54065.json · Exploit
• https://osv.dev/vulnerability/CVE-2023-54065 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2023-54065 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-54065 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-54065 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-54065 · Security Note
• https://bdu.fstec.ru/vul/2026-04227 · Security Note
• https://cve.org/CVERecord?id=CVE-2023-54065 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-54065 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-54065 · Vendor Advisory
• https://git.kernel.org/stable/c/fe668aa499b4b95425044ba11af9609db6ecf466 · Note
• https://twitter.com/CVEnew/status/2004457778891681988 · Twitter Post
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.10 · Note
• https://docs.bell-sw.com/security/cves/CVE-2023-54065 · Note