CVE-2023-38428

Name: CVE-2023-38428
Creator: NVD / NIST
Published: 2023-07-18T00:15:09.577+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 2.97%

Last modified Jun 17, 2026

CVE-2023-38428 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. An issue was discovered in the Linux kernel before 6.3.4. fs/ksmbd/smb2pdu.c in ksmbd does not properly check the UserName value because it does not consider the address of security buffer, leading to an out-of-bounds read.. EPSS estimates a 2.97% chance of exploitation in the next 30 days.

Description

An issue was discovered in the Linux kernel before 6.3.4. fs/ksmbd/smb2pdu.c in ksmbd does not properly check the UserName value because it does not consider the address of security buffer, leading to an out-of-bounds read.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

2.97%

85.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 5.15, < 5.15.113
Linux	Linux Kernel	>= 5.16, < 6.1.30
Linux	Linux Kernel	>= 6.2, < 6.3.4
Netapp	Solidfire \& Hci Management Node	All versions
Netapp	Solidfire \& Hci Storage Node	All versions
Netapp	H300s	All versions
Netapp	H410s	All versions
Netapp	H500s	All versions
Netapp	H700s	All versions

References

https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.4Release Notes
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/ksmbd?id=f0a96d1aafd8964e1f9955c830a3e5cb3c60a90fPatch
https://security.netapp.com/advisory/ntap-20230831-0001/Third Party Advisory, VDB Entry
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.4Release Notes
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/ksmbd?id=f0a96d1aafd8964e1f9955c830a3e5cb3c60a90fPatch
https://security.netapp.com/advisory/ntap-20230831-0001/Third Party Advisory, VDB Entry

Timeline

Published: Jul 18, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-38428?

How severe is CVE-2023-38428?

CVE-2023-38428 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 2.97% probability of exploitation in the next 30 days.

How do I fix CVE-2023-38428?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-38428?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST