CVE-2023-4130 – Kerberos SMBd Buffer Length Validation Overflow

CVE ID : CVE-2023-4130

Published : Aug. 16, 2025, 2:15 p.m. | 1 hour, 46 minutes ago

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.

Severity: 0.0 | NA

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