Linux Kernel up to 5.15.126/6.1.45/6.4.10 ksmbd privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Linux Kernel up to 5.15.126/6.1.45/6.4.10. This vulnerability affects unknown code of the component ksmbd. The manipulation results in an unknown weakness. This vulnerability is known as CVE-2023-4515. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in Linux Kernel up to 5.15.126/6.1.45/6.4.10. Affected is an unknown part of the component ksmbd. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate command request size In commit 2b9b8f3b68ed ("ksmbd: validate command payload size"), except for SMB2_OPLOCK_BREAK_HE command, the request size of other commands is not checked, it's not expected. Fix it by add check for request size of other commands.

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2023-4515 since 08/24/2023. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 260064 (Linux Distros Unpatched Vulnerability : CVE-2023-4515), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.15.127, 6.1.46 or 6.4.11 eliminates this vulnerability. Applying the patch 595679098bdcdbfbba91ebe07a2f7f208df93870/c6bef3bc30fd4a175aef846b7d928a6c40d091cd/ff7236b66d69582f90cf5616e63cfc3dc18142bb/5aa4fda5aa9c2a5a7bac67b4a12b089ab81fee3c is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (260064) and CERT Bund (WID-SEC-2025-1858). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Dell Avamar
  • Open Source Linux Kernel
  • Dell NetWorker
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM
  • IBM Security Verify Access

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 260064
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-4515

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.15.127/6.1.46/6.4.11
Patch: 595679098bdcdbfbba91ebe07a2f7f208df93870/c6bef3bc30fd4a175aef846b7d928a6c40d091cd/ff7236b66d69582f90cf5616e63cfc3dc18142bb/5aa4fda5aa9c2a5a7bac67b4a12b089ab81fee3c

Timelineinfo

08/24/2023 CVE reserved
08/16/2025 +723 days Advisory disclosed
08/16/2025 +0 days VulDB entry created
01/30/2026 +167 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-4515 (🔒)
GCVE (CVE): GCVE-0-2023-4515
GCVE (VulDB): GCVE-100-320400
CERT Bund: WID-SEC-2025-1858 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 08/16/2025 18:03
Updated: 01/30/2026 16:39
Changes: 08/16/2025 18:03 (56), 08/31/2025 23:01 (2), 09/28/2025 06:40 (7), 10/02/2025 17:51 (1), 10/12/2025 16:40 (1), 11/01/2025 18:43 (1), 11/18/2025 10:37 (1), 11/19/2025 02:42 (11), 01/30/2026 16:39 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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