CVE-2023-4130

MEDIUM

Linux Kernel 5.15-5.15.127 - Buffer Length Validation Bypass in ksmbd SMB2 EA Handling

Title source: llm

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea() There are multiple smb2_ea_info buffers in FILE_FULL_EA_INFORMATION request from client. ksmbd find next smb2_ea_info using ->NextEntryOffset of current smb2_ea_info. ksmbd need to validate buffer length Before accessing the next ea. ksmbd should check buffer length using buf_len, not next variable. next is the start offset of current ea that got from previous ea.

References (4)

Core 4

Core References

Patch

https://git.kernel.org/stable/c/aeb974907642be095e38ecb1a400ca583958b2b0

Patch

https://git.kernel.org/stable/c/f339d76a3a972601d0738b881b099d49ebbdc3a2

Patch

https://git.kernel.org/stable/c/4bf629262f9118ee91b1c3a518ebf2b3bcb22180

Patch

https://git.kernel.org/stable/c/79ed288cef201f1f212dfb934bcaac75572fb8f6

Scores

CVSS v3 5.5

EPSS 0.0023

EPSS Percentile 14.2%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Details

Status published

Products (15)

linux/Kernel 5.15.0 - 5.15.127linux

linux/Kernel 5.16.0 - 6.1.46linux

linux/Kernel 6.2.0 - 6.4.11linux

Linux/Linux < 5.15

Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - 4bf629262f9118ee91b1c3a518ebf2b3bcb22180

Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - 79ed288cef201f1f212dfb934bcaac75572fb8f6

Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - aeb974907642be095e38ecb1a400ca583958b2b0

Linux/Linux 0626e6641f6b467447c81dd7678a69c66f7746cf - f339d76a3a972601d0738b881b099d49ebbdc3a2

Linux/Linux 5.15

Linux/Linux 5.15.127 - 5.15.*

... and 5 more

Published Aug 16, 2025

Tracked Since Feb 18, 2026