CVE-2023-4130
ksmbd: fix wrong next length validation of ea buffer in smb2_set_ea()
- Published
- Aug 16, 2025
- Updated
- Aug 15, 2026
- Assigning CNA
- Linux
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HLow · next 30 days
- Percentile
- 41.3%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1- ksmbd-n-dayExploit
Authenticated 0-click RCE against Linux 6.1.45 for CVE-2023-52440 and CVE-2023-4130
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