Linux Kernel up to 5.4.301/6.6.117/6.12.59/6.17.9 be_insert_vlan_in_pkt wrb_params null pointer dereference

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.5$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 5.4.301/6.6.117/6.12.59/6.17.9. Affected is the function be_insert_vlan_in_pkt. Such manipulation of the argument wrb_params leads to null pointer dereference. This vulnerability is uniquely identified as CVE-2025-40264. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.4.301/6.6.117/6.12.59/6.17.9. It has been rated as critical. Affected by this issue is the function be_insert_vlan_in_pkt. The manipulation of the argument wrb_params with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: be2net: pass wrb_params in case of OS2BMC be_insert_vlan_in_pkt() is called with the wrb_params argument being NULL at be_send_pkt_to_bmc() call site.  This may lead to dereferencing a NULL pointer when processing a workaround for specific packet, as commit bc0c3405abbb ("be2net: fix a Tx stall bug caused by a specific ipv6 packet") states. The correct way would be to pass the wrb_params from be_xmit().

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2025-40264 since 04/16/2025. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 277520 (Linux Distros Unpatched Vulnerability : CVE-2025-40264), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.302, 6.6.118, 6.12.60 or 6.17.10 eliminates this vulnerability. Applying the patch 48d59b60dd5d7e4c48c077a2008c9dcd7b59bdfe/ce0a3699244aca3acb659f143c9cb1327b210f89/1ecd86ec6efddb59a10c927e8e679f183bb9113e/4c4741f6e7f2fa4e1486cb61e1c15b9236ec134d/7d277a7a58578dd62fd546ddaef459ec24ccae36 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 (277520), EUVD (EUVD-2025-201193) and CERT Bund (WID-SEC-2025-2747). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Debian Linux
  • Google Cloud Platform
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • Open Source Linux Kernel
  • RESF Rocky Linux
  • Microsoft Azure Linux

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 277520
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-40264

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.302/6.6.118/6.12.60/6.17.10
Patch: 48d59b60dd5d7e4c48c077a2008c9dcd7b59bdfe/ce0a3699244aca3acb659f143c9cb1327b210f89/1ecd86ec6efddb59a10c927e8e679f183bb9113e/4c4741f6e7f2fa4e1486cb61e1c15b9236ec134d/7d277a7a58578dd62fd546ddaef459ec24ccae36

Timelineinfo

04/16/2025 CVE reserved
12/04/2025 +232 days Advisory disclosed
12/04/2025 +0 days VulDB entry created
03/04/2026 +90 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-40264 (🔒)
GCVE (CVE): GCVE-0-2025-40264
GCVE (VulDB): GCVE-100-334322
EUVD: 🔒
CERT Bund: WID-SEC-2025-2747 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 12/04/2025 17:50
Updated: 03/04/2026 13:32
Changes: 12/04/2025 17:50 (59), 12/04/2025 19:58 (1), 12/06/2025 15:38 (2), 01/05/2026 05:10 (7), 03/04/2026 13:32 (1)
Complete: 🔍
Cache ID: 216::103

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

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you want to use VulDB in your project?

Use the official API to access entries easily!