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Linux CVE-2023-32256

HIGH
Race Condition During Access to Alternate Channel (CWE-421)
2025-08-01 secalert@redhat.com
Information Disclosure Linux
7.5
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
7.5 HIGH
AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:H
SUSE
HIGH
qualitative
Red Hat
7.5 HIGH
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:H
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
None
Availability
High

Lifecycle Timeline

3
Patch released
Apr 02, 2026 - 08:30 nvd
Patch available
Analysis Generated
Mar 28, 2026 - 19:04 vuln.today
CVE Published
Aug 01, 2025 - 18:15 nvd
HIGH 7.5

DescriptionCVE.org

A flaw was found in the Linux kernel's ksmbd component. A race condition between smb2 close operation and logoff in multichannel connections could result in a use-after-free issue.

AnalysisAI

A flaw was found in the Linux kernel's ksmbd component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required.

Technical ContextAI

This vulnerability is classified under CWE-421. A flaw was found in the Linux kernel's ksmbd component. A race condition between smb2 close operation and logoff in multichannel connections could result in a use-after-free issue.

Affected ProductsAI

See vendor advisory for affected versions.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Same weakness CWE-421 – Race Condition During Access to Alternate Channel

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Vendor StatusVendor

SUSE

Severity: High
Product Status
SUSE Linux Enterprise Micro 5.2 Fixed
SUSE Linux Enterprise Micro 5.2 Fixed
SUSE Linux Enterprise Micro 5.2 Fixed
SUSE Linux Enterprise Micro 5.3 Fixed
SUSE Linux Enterprise Micro 5.3 Fixed

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CVE-2023-32256 vulnerability details – vuln.today
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