HOMEVULNERABILITIESCVE-2023-38428
CRITICAL

CVE-2023-38428

CWE-125Published: July 18, 2023· Updated: Jun 17, 2026

9.1
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2023-38428 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 9.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected Vendors & Products

Linux1 product(s)
linux kernel
netapp6 product(s)
solidfire \& hci management nodesolidfire \& hci storage nodeh300sh410sh500sh700s
Source: NVD CPE · 7 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/ksmbd?id=f0a96d1aafd8964e1f9955c830a3e5cb3c60a90f
PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/ksmbd?id=f0a96d1aafd8964e1f9955c830a3e5cb3c60a90f
ADVISORYhttps://security.netapp.com/advisory/ntap-20230831-0001/
ADVISORYhttps://security.netapp.com/advisory/ntap-20230831-0001/

All References (6)

→
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

Quick Facts

CVE IDCVE-2023-38428
CVSS Score9.1 / 10
SeverityCRITICAL
WeaknessCWE-125
CISA KEVNo
Affected2 vendor(s)
PublishedJul 18, 2023

Related CVEs (CWE-125)

CVE-2021-41556
10.0
CVE-2017-14451
10.0
CVE-2021-21777
10.0
CVE-2013-0767
10.0
CVE-2009-2523
10.0
CVE-2023-26489
9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-38428 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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