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Vulnerability record · CVE-2023-38430 · published 18 July 2023

CVE-2023-38430: Linux kernel out-of-bounds read vulnerability

Linux · Linux Kernel

An issue was discovered in the Linux kernel before 6.3.9. ksmbd does not validate the SMB request protocol ID, leading to an out-of-bounds read.

9.1 CVSS 3.1 Critical EPSS 1.2% · top 34.0% CWE-125 · Out-of-bounds read
9.1CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in the Linux kernel before 6.3.9. ksmbd does not validate the SMB request protocol ID, leading to an out-of-bounds read.

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

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.9 Release Notes
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb/server?id=1c1bcf2d3ea061613119b534f5750 Patch
https://security.netapp.com/advisory/ntap-20230831-0003/ Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.9 Release Notes
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb/server?id=1c1bcf2d3ea061613119b534f5750 Patch
https://security.netapp.com/advisory/ntap-20230831-0003/ Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2023-38430), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.