Linux Kernel up to 6.18.9 smb ksmbd_session_rpc_close privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 5.15.199/6.1.162/6.6.123/6.12.69/6.18.9. The affected element is the function ksmbd_session_rpc_close of the component smb. Executing a manipulation can lead to an unknown weakness. This vulnerability is handled as CVE-2025-71220. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.15.199/6.1.162/6.6.123/6.12.69/6.18.9. It has been declared as critical. This vulnerability affects the function ksmbd_session_rpc_close of the component smb. The impact remains unknown. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: smb/server: call ksmbd_session_rpc_close() on error path in create_smb2_pipe() When ksmbd_iov_pin_rsp() fails, we should call ksmbd_session_rpc_close().

The advisory is available at git.kernel.org. This vulnerability was named CVE-2025-71220 since 02/14/2026. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 05/06/2026).

The vulnerability scanner Nessus provides a plugin with the ID 299102 (Linux Distros Unpatched Vulnerability : CVE-2025-71220), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.15.200, 6.1.163, 6.6.124, 6.12.70 or 6.18.10 eliminates this vulnerability. Applying the patch a2c68e256fb7a4ac34154c6e865a1389acca839f/2b7b4df87fe6f2db6ee45f475de6b37b8b8e5d29/04dd114b682a4ccaeba2c2bad049c8b50ce740d8/ac18761b530b5dd40f59af8a25902282e5512854/fdda836fcee6fdbcccc24e3679097efb583f581f/7c28f8eef5ac5312794d8a52918076dcd787e53b 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 (299102) and CERT Bund (WID-SEC-2026-0421). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Google Cloud Platform
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • IBM QRadar SIEM

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

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

NVD Base Score: 7.8
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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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: 299102
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-71220

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.15.200/6.1.163/6.6.124/6.12.70/6.18.10
Patch: a2c68e256fb7a4ac34154c6e865a1389acca839f/2b7b4df87fe6f2db6ee45f475de6b37b8b8e5d29/04dd114b682a4ccaeba2c2bad049c8b50ce740d8/ac18761b530b5dd40f59af8a25902282e5512854/fdda836fcee6fdbcccc24e3679097efb583f581f/7c28f8eef5ac5312794d8a52918076dcd787e53b

Timelineinfo

02/14/2026 Advisory disclosed
02/14/2026 +0 days CVE reserved
02/14/2026 +0 days VulDB entry created
05/06/2026 +81 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-71220 (🔒)
GCVE (CVE): GCVE-0-2025-71220
GCVE (VulDB): GCVE-100-346066
CERT Bund: WID-SEC-2026-0421 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 02/14/2026 18:12
Updated: 05/06/2026 05:18
Changes: 02/14/2026 18:12 (58), 02/15/2026 13:07 (2), 02/19/2026 13:32 (1), 03/19/2026 21:00 (11), 05/06/2026 05:18 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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