CVE-2023-52440
ksmbd: fix slub overflow in ksmbd_decode_ntlmssp_auth_blob()
- Published
- Feb 21, 2024
- 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:N/UI:N/S:U/C:H/I:H/A:HModerate · next 30 days
- Percentile
- 97.6%
- 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 slub overflow in ksmbd_decode_ntlmssp_auth_blob() If authblob->SessionKey.Length is bigger than session key size(CIFS_KEY_SIZE), slub overflow can happen in key exchange codes. cifs_arc4_crypt copy to session key array from SessionKey from client.
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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