What is CVE-2023-32256?

CVE-2023-32256 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10. CVE-2023-32256 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-32256?

CVE-2023-32256 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:H.

Is there a patch available for CVE-2023-32256?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-32256 patch availability.

Is CVE-2023-32256 actively exploited?

CVE-2023-32256 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-32256

High

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.

Package Linux Kernel

Published 2025-08-01

Last modified 2026-06-29

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-421

CVE-2023-32256 is classified as CWE-421

See CWE-421 on MITRE CWE for full details on this weakness type.

References

4 total

Red Hat
https://access.redhat.com/security/cve/CVE-2023-32256
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2385885
Kernel Git
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=abcc506a9a71976a8b4c9bf3ee6efd13229c1e19
Zerodayinitiative
https://www.zerodayinitiative.com/advisories/ZDI-23-704/

Details

CVE ID CVE-2023-32256

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2025-08-01

Modified 2026-06-29

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-32256?

CVE-2023-32256 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 . CVE-2023-32256 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-32256?

CVE-2023-32256 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:H.
Is there a patch available for CVE-2023-32256?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-32256 patch availability.
Is CVE-2023-32256 actively exploited?

No. CVE-2023-32256 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.