Linux Kernel up to 6.6.119/6.12.63/6.18.2/6.19-rc1 handshake_req_submit privilege escalation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.3$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Linux Kernel up to 6.6.119/6.12.63/6.18.2/6.19-rc1. The impacted element is the function handshake_req_submit. This manipulation causes an unknown weakness. This vulnerability is tracked as CVE-2025-71148. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.119/6.12.63/6.18.2/6.19-rc1. It has been declared as critical. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: net/handshake: restore destructor on submit failure handshake_req_submit() replaces sk->sk_destruct but never restores it when submission fails before the request is hashed. handshake_sk_destruct() then returns early and the original destructor never runs, leaking the socket. Restore sk_destruct on the error path.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2025-71148 since 01/13/2026. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/17/2026).

The vulnerability scanner Nessus provides a plugin with the ID 296385 (Linux Distros Unpatched Vulnerability : CVE-2025-71148), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.120, 6.12.64, 6.18.3 or 6.19-rc2 eliminates this vulnerability. Applying the patch cd8cf2be3717137554744233fda051ffc09d1d44/7b82a1d6ae869533d8bdb0282a3a78faed8e63dd/b225325be7b247c7268e65eea6090db1fc786d1f/6af2a01d65f89e73c1cbb9267f8880d83a88cee4 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 (296385) and CERT Bund (WID-SEC-2026-0215). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • IBM QRadar SIEM
  • SUSE openSUSE
  • RESF Rocky Linux
  • NetApp ActiveIQ Unified Manager
  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

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

NVD Base Score: 3.3
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: 296385
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-71148

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.120/6.12.64/6.18.3/6.19-rc2
Patch: cd8cf2be3717137554744233fda051ffc09d1d44/7b82a1d6ae869533d8bdb0282a3a78faed8e63dd/b225325be7b247c7268e65eea6090db1fc786d1f/6af2a01d65f89e73c1cbb9267f8880d83a88cee4

Timelineinfo

01/13/2026 CVE reserved
01/23/2026 +10 days Advisory disclosed
01/23/2026 +0 days VulDB entry created
05/17/2026 +114 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-71148 (🔒)
GCVE (CVE): GCVE-0-2025-71148
GCVE (VulDB): GCVE-100-342547
CERT Bund: WID-SEC-2026-0215 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 01/23/2026 16:15
Updated: 05/17/2026 19:37
Changes: 01/23/2026 16:15 (57), 01/25/2026 12:46 (2), 01/26/2026 13:22 (7), 02/26/2026 23:51 (11), 03/02/2026 09:54 (1), 05/17/2026 19:37 (1)
Complete: 🔍
Cache ID: 216::103

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