CVE-2023-32248

Tree connection null pointer dereference denial-of-service vulnerability

HIGH
7.5
CVSS Score
Published: July 24, 2023 at 03:19 PM UTC
Updated: June 17, 2026 at 05:58 AM UTC
6 products affected across 2 vendorsLinux KernelH700SH500S

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Severity
HIGH7.5
Exploit prediction
EPSS 4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.15 ≤ v < 5.15.1115.16 ≤ v < 6.1.286.2 ≤ v < 6.2.156.3 ≤ v < 6.3.2
Affected range stops below 5.15.111, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.1.28, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.2.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.2, so it looks safe — our inference, not a vendor statement
All versions
All versions
All versions
All versions
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

CVSS

7.5HIGHredhat
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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