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Vulnerability record · CVE-2023-32248 · published 24 July 2023

CVE-2023-32248: Linux kernel null pointer dereference vulnerability

Linux · Linux Kernel

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_TREE_CONNECT and SMB2_QUERY_INFO commands. The issue results from the lack of proper validation of a pointer prior to accessing it. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.

7.5 CVSS 3.1 High EPSS 4.1% · top 9.6% CWE-476 · NULL pointer dereference
7.5CVSS 3.1 base score
4.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

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_TREE_CONNECT and SMB2_QUERY_INFO commands. The issue results from the lack of proper validation of a pointer prior to accessing it. An attacker can leverage this vulnerability to create a denial-of-service condition on the system.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://access.redhat.com/security/cve/CVE-2023-32248 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2219818 Issue TrackingPatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20230915-0006/ Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-CAN-20479/ PatchThird Party AdvisoryVDB Entry
https://access.redhat.com/security/cve/CVE-2023-32248 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2219818 Issue TrackingPatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20230915-0006/ Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-CAN-20479/ PatchThird Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2023-32248), CISA KEV, FIRST EPSS (scores of 2026-10-05). This page is refreshed as NVD updates the record.