Linux Kernel up to 6.17-rc2 qla4xxx_get_ep_fwdb null pointer dereference

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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Linux Kernel up to 6.17-rc2. The impacted element is the function qla4xxx_get_ep_fwdb. The manipulation results in null pointer dereference. This vulnerability is known as CVE-2025-39676. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.17-rc2. It has been classified as critical. Affected is the function qla4xxx_get_ep_fwdb. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: scsi: qla4xxx: Prevent a potential error pointer dereference The qla4xxx_get_ep_fwdb() function is supposed to return NULL on error, but qla4xxx_ep_connect() returns error pointers. Propagating the error pointers will lead to an Oops in the caller, so change the error pointers to NULL.

The advisory is available at git.kernel.org. This vulnerability is traded as CVE-2025-39676 since 04/16/2025. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 261626 (Linux Distros Unpatched Vulnerability : CVE-2025-39676), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.297, 5.10.241, 5.15.190, 6.1.149, 6.6.103, 6.12.44, 6.16.4 or 6.17-rc3 eliminates this vulnerability. Applying the patch d0225f41ee70611ca88ccb22c8542ecdfa7faea8/ad8a9d38d30c691a77c456e72b78f7932d4f234d/325bf7d57c4e2a341e381c5805e454fb69dd78c3/46288d12d1c30d08fbeffd05abc079f57a43a2d4/f5ad0819f902b4b33591791b92a0350fb3692a6b/f1424c830d6ce840341aac33fe99c8ac45447ac1/f4bc3cdfe95115191e24592bbfc15f1d4a705a75/9dcf111dd3e7ed5fce82bb108e3a3fc001c07225 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 (261626) and CERT Bund (WID-SEC-2025-1988). 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
  • NetApp FAS
  • NetApp AFF
  • NetApp ActiveIQ Unified Manager
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • Microsoft Azure
  • Dell Secure Connect Gateway
  • IBM QRadar SIEM
  • IBM Security Verify Access
  • Dell NetWorker

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
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: Null pointer dereference
CWE: CWE-476 / CWE-404
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: 261626
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-39676

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.4.297/5.10.241/5.15.190/6.1.149/6.6.103/6.12.44/6.16.4/6.17-rc3
Patch: d0225f41ee70611ca88ccb22c8542ecdfa7faea8/ad8a9d38d30c691a77c456e72b78f7932d4f234d/325bf7d57c4e2a341e381c5805e454fb69dd78c3/46288d12d1c30d08fbeffd05abc079f57a43a2d4/f5ad0819f902b4b33591791b92a0350fb3692a6b/f1424c830d6ce840341aac33fe99c8ac45447ac1/f4bc3cdfe95115191e24592bbfc15f1d4a705a75/9dcf111dd3e7ed5fce82bb108e3a3fc001c07225

Timelineinfo

04/16/2025 CVE reserved
09/05/2025 +142 days Advisory disclosed
09/05/2025 +0 days VulDB entry created
02/09/2026 +157 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-39676 (🔒)
GCVE (CVE): GCVE-0-2025-39676
GCVE (VulDB): GCVE-100-322890
CERT Bund: WID-SEC-2025-1988 - Linux Kernel: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 09/05/2025 21:44
Updated: 02/09/2026 11:22
Changes: 09/05/2025 21:44 (58), 09/07/2025 06:04 (2), 09/09/2025 08:23 (7), 11/06/2025 15:58 (1), 11/25/2025 20:57 (1), 11/27/2025 14:46 (1), 12/29/2025 11:03 (1), 01/05/2026 10:32 (1), 01/08/2026 05:05 (10), 02/09/2026 11:22 (1)
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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