Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.
Summary
CVE-2023-32252 is a high-severity NULL Pointer Dereference (CWE-476) vulnerability in Linux Linux Kernel. Its CVSS base score is 7.5 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique OS Credential Dumping (T1003); ranked in the top 10% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
A flaw exists in the Linux kernel's ksmbd, the high-performance in-kernel SMB server, specifically in its handling of SMB2_LOGOFF commands. The root cause is missing validation of a pointer before it is dereferenced, classified as CWE-476. The resulting denial-of-service condition carries a CVSS 3.1 base score of 7.5 with network attack vector, no required privileges or user interaction, and high availability impact.
An unauthenticated remote attacker can send crafted SMB2_LOGOFF requests to a vulnerable ksmbd instance and trigger a kernel-level crash or service outage, achieving denial of service without any other system access.
The EPSS probability rose from a low baseline to a peak of 0.0660 on 2025-01-22 before receding to the current value of 0.0014, indicating a period of increased exploitation interest after public disclosure. Red Hat, NetApp, and Zero Day Initiative advisories reference the issue and point to corresponding kernel updates.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2023-36509
Vulnerability Data
A flaw was found in the Linux kernel's ksmbd, a high-performance in-kernel SMB server. The specific flaw exists within the handling of SMB2_LOGOFF commands. The issue results from the lack of proper validation of a pointer prior to accessing it.…
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An attacker can leverage this vulnerability to create a denial-of-service condition on the system.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices (static analysis, code review, safe coding standards) directly prevent NULL dereference bugs during development.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.