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CVE-2023-32254

28
FAUCET Score

CVE-2023-32254 is a high-severity flaw in the Linux kernel's ksmbd, an in-kernel SMB server, specifically affecting the processing of SMB2_TREE_DISCONNECT commands. This vulnerability, rated 8.1 HIGH on CVSS, stems from a lack of proper locking during object operations, allowing an unauthenticated attacker to execute arbitrary code within the kernel context with high impact on confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
>= 5.15, < 5.15.145CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 5.16, < 6.1.28CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.2, < 6.2.15CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 6.3, < 6.3.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.94%
Probability of exploitation in next 30 days
EPSS Percentile
85.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0294 is in the 44th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.118.1-1 on CBL Mariner 2.0Fixed in: 5.15.118.1-1
microsoftpatch availablevia msrc
Product: cm1 kernel 5.10.188.1-1 on CBL Mariner 1.0Fixed in: 5.10.188.1-1
microsoftpatch availablevia msrc
Product: cbl2 hyperv-daemons 5.15.145.2-1 on CBL Mariner 2.0Fixed in: 5.15.145.2-1
microsoftpatch availablevia msrc
Product: 17829-16823Fixed in: 5.15.118.1-1
microsoftpatch availablevia msrc
Product: 17823-16820Fixed in: 5.10.188.1-1
microsoftpatch availablevia msrc
Product: 17828-16823Fixed in: 5.15.145.2-1
redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (2)

microsoft2023-Jul/CVE-2023-32254Important

Tree connection race condition remote code execution vulnerability

Jul 11, 2023
redhatCVE-2023-32254Important

kernel: ksmbd: tree connection race condition remote code execution vulnerability

May 17, 2023

References

access.redhat.com / security/cve/CVE-2023-32254
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
security.netapp.com / advisory/ntap-20230824-0004
Third Party Advisory
zerodayinitiative.com / advisories/ZDI-23-702
PatchThird Party AdvisoryVDB Entry