CVE-2023-52440

ksmbd: fix slub overflow in ksmbd_decode_ntlmssp_auth_blob()

Published Feb 21, 2024 CVSS 3.1 · 9.8 Critical EPSS 22.3% KEV · Not listed
Description
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.

Analysis

No analysis available yet

Remediation

No remediation available yet

Tracking

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Advisories

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History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Metrics epss

{'score': 0.01085}

epss

{'score': 0.00801}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses
  • CWE-119

    Improper Restriction of Operations within the Bounds of a Memory Buffer

Sources

Status
PUBLISHED
Assigner
Linux
Published
Updated
Aug 15, 2026, 12:23 PM
Reserved
Feb 20, 2024, 12:30 PM
Status
Modified
Published
Feb 21, 2024, 8:15 AM
Modified
Aug 15, 2026, 1:17 PM