What is CVE-2023-32251?

CVE-2023-32251 is a Low severity Linux kernel vulnerability with a CVSS score of 3.7 out of 10. CVE-2023-32251 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-32251?

CVE-2023-32251 has a CVSS score of 3.7 out of 10, rated Low severity. The vector string is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.

Is there a patch available for CVE-2023-32251?

No patch is currently available for CVE-2023-32251. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2023-32251 actively exploited?

CVE-2023-32251 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-32251

Low

A vulnerability has been identified in the Linux kernel's ksmbd component (kernel SMB/CIFS server). A security control designed to prevent dictionary attacks, which introduces a 5-second delay during session setup, can be bypassed through the use of asynchronous requests. This bypass negates the intended anti-brute-force protection, potentially allowing attackers to conduct dictionary attacks more efficiently against user credentials or other authentication mechanisms.

Package Linux Kernel

Published 2025-07-31

Last modified 2026-04-15

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

3.7

out of 10

Low

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Vector string

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

Weakness type

CWE-307

CVE-2023-32251 is classified as CWE-307

See CWE-307 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2023-32251 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://access.redhat.com/security/cve/CVE-2023-32251
Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2385852
Zerodayinitiative
https://www.zerodayinitiative.com/advisories/ZDI-23-699/
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b096d97f47326b1e2dbdef1c91fab69ffda54d17
Patch

Details

CVE ID CVE-2023-32251

Severity Low

CVSS score 3.7 / 10

CVSS version 3.1

Published 2025-07-31

Modified 2026-04-15

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-32251?

CVE-2023-32251 is a Low severity Linux kernel vulnerability with a CVSS score of 3.7 out of 10 . CVE-2023-32251 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-32251?

CVE-2023-32251 has a CVSS score of 3.7 out of 10, rated Low severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.
Is there a patch available for CVE-2023-32251?

No patch is currently available for CVE-2023-32251. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2023-32251 actively exploited?

No — CVE-2023-32251 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.