Linux Kernel up to 6.6.78/6.12.15/6.13.3/6.14-rc2 gpiochip_get_ngpios null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.6.78/6.12.15/6.13.3/6.14-rc2 and classified as critical. This vulnerability affects the function gpiochip_get_ngpios. Executing a manipulation can lead to null pointer dereference. The identification of this vulnerability is CVE-2025-21783. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.6.78/6.12.15/6.13.3/6.14-rc2. This vulnerability affects the function gpiochip_get_ngpios. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: gpiolib: Fix crash on error in gpiochip_get_ngpios() The gpiochip_get_ngpios() uses chip_*() macros to print messages. However these macros rely on gpiodev to be initialised and set, which is not the case when called via bgpio_init(). In such a case the printing messages will crash on NULL pointer dereference. Replace chip_*() macros by the respective dev_*() ones to avoid such crash.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2025-21783 since 12/29/2024. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 230851 (Linux Distros Unpatched Vulnerability : CVE-2025-21783), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.79, 6.12.16, 6.13.4 or 6.14-rc3 eliminates this vulnerability. Applying the patch 4d9b2b62e1136d10f661ec4c0c268140b6f74f4f/a7052afa9eae2239e25943baa8817a6a56e8aa68/189fb76215e479c10731baabb50f1a352d2078f5/7b4aebeecbbd5b5fe73e35fad3f62ed21aa7ef44 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 (230851) and CERT Bund (WID-SEC-2025-0453). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Siemens SIMATIC S7
  • RESF Rocky Linux
  • Dell NetWorker
  • Dell Avamar
  • Red Hat OpenShift
  • IBM QRadar SIEM
  • SolarWinds Security Event Manager
  • Dell PowerProtect Data Domain
  • Open Source Linux Kernel
  • IBM DataPower Gateway
  • Dell Secure Connect Gateway
  • Dell PowerScale OneFS
  • Dell ECS

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
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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: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 230851
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-21783

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.6.79/6.12.16/6.13.4/6.14-rc3
Patch: 4d9b2b62e1136d10f661ec4c0c268140b6f74f4f/a7052afa9eae2239e25943baa8817a6a56e8aa68/189fb76215e479c10731baabb50f1a352d2078f5/7b4aebeecbbd5b5fe73e35fad3f62ed21aa7ef44

Timelineinfo

12/29/2024 🔍
02/27/2025 +60 days 🔍
02/27/2025 +0 days 🔍
05/25/2026 +452 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21783 (🔍)
GCVE (CVE): GCVE-0-2025-21783
GCVE (VulDB): GCVE-100-297784
CERT Bund: WID-SEC-2025-0453 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 02/27/2025 09:13
Updated: 05/25/2026 15:04
Changes: 02/27/2025 09:13 (58), 03/06/2025 11:05 (2), 10/26/2025 04:39 (7), 11/10/2025 09:17 (1), 01/18/2026 10:39 (1), 05/25/2026 15:04 (1)
Complete: 🔍
Cache ID: 216::103

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