Linux Kernel up to 6.13.6 cfg80211 regulatory_hint_user user_alpha2[] information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.13.6. Affected by this issue is the function regulatory_hint_user of the component cfg80211. This manipulation of the argument user_alpha2[] causes information disclosure. This vulnerability is handled as CVE-2025-21910. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.13.6 and classified as problematic. Affected by this vulnerability is the function regulatory_hint_user of the component cfg80211. The manipulation of the argument user_alpha2[] with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality.

It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2025-21910 since 12/29/2024. The exploitation appears to be difficult. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 234309 (Debian dsa-5900 : affs-modules-6.1.0-28-4kc-malta-di - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.4.291, 5.10.235, 5.15.179, 6.1.131, 6.6.83, 6.12.19 or 6.13.7 eliminates this vulnerability. Applying the patch 62b1a9bbfebba4b4c2bb6c1ede9ef7ecee7a9ff6/da3f599517ef2ea851208df3229d07728d238dc5/6a5e3b23054cee3b92683d1467e3fa83921f5622/f4112cb477c727a65787a4065a75ca593bb5b2f4/35ef07112b61b06eb30683a6563c9f6378c02476/be7c5f00aa7f1344293e4d48d0e12be83a2f223d/17aa34c84867f6cd181a5743e1c647e7766962a6/59b348be7597c4a9903cb003c69e37df20c04a30 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 (234309) and CERT Bund (WID-SEC-2025-0683). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • RESF Rocky Linux
  • Dell Avamar
  • Open Source Linux Kernel
  • SolarWinds Security Event Manager
  • Dell NetWorker
  • Dell Secure Connect Gateway
  • IBM Security Verify Access

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.0
VulDB Meta Temp Score: 4.0

VulDB Base Score: 2.6
VulDB Temp Score: 2.5
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: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
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: 234309
Nessus Name: Debian dsa-5900 : affs-modules-6.1.0-28-4kc-malta-di - security update

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.4.291/5.10.235/5.15.179/6.1.131/6.6.83/6.12.19/6.13.7
Patch: 62b1a9bbfebba4b4c2bb6c1ede9ef7ecee7a9ff6/da3f599517ef2ea851208df3229d07728d238dc5/6a5e3b23054cee3b92683d1467e3fa83921f5622/f4112cb477c727a65787a4065a75ca593bb5b2f4/35ef07112b61b06eb30683a6563c9f6378c02476/be7c5f00aa7f1344293e4d48d0e12be83a2f223d/17aa34c84867f6cd181a5743e1c647e7766962a6/59b348be7597c4a9903cb003c69e37df20c04a30

Timelineinfo

12/29/2024 🔍
04/01/2025 +92 days 🔍
04/01/2025 +0 days 🔍
02/01/2026 +306 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2025-21910 (🔍)
GCVE (CVE): GCVE-0-2025-21910
GCVE (VulDB): GCVE-100-302611
CERT Bund: WID-SEC-2025-0683 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 04/01/2025 18:57
Updated: 02/01/2026 05:04
Changes: 04/01/2025 18:57 (59), 04/14/2025 13:56 (2), 07/20/2025 02:06 (7), 07/21/2025 18:29 (1), 10/26/2025 19:41 (1), 10/31/2025 19:52 (12), 02/01/2026 05:04 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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