Linux Kernel up to 7.0-rc2 wifi denial of service

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

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 7.0-rc2. This issue affects some unknown processing of the component wifi. Performing a manipulation results in denial of service. This vulnerability is known as CVE-2026-23420. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 7.0-rc2. This affects some unknown processing of the component wifi. The manipulation with an unknown input leads to a denial of service vulnerability. CWE is classifying the issue as CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. This is going to have an impact on availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: wifi: wlcore: Fix a locking bug Make sure that wl->mutex is locked before it is unlocked. This has been detected by the Clang thread-safety analyzer.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-23420 since 01/13/2026. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 304986 (Linux Distros Unpatched Vulnerability : CVE-2026-23420), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.1.167, 6.6.130, 6.12.77, 6.18.17, 6.19.7 or 7.0-rc3 eliminates this vulnerability. Applying the patch 7ab511003c5ae3bf5364d7699a2e3ab1db513680/aca4c9e4901b01b8b985993dc7df80bd1d1338bd/5feeea59ed142e15c3284d0b1a364c6786bf3487/fcef983ad88832f3aa83491a174c345de57afbbd/1a1c28a08d74716f3f8e3a21c86b30d0ff13521a/72c6df8f284b3a49812ce2ac136727ace70acc7c 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 (304986), EUVD (EUVD-2026-18637) and CERT Bund (WID-SEC-2026-0985). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • 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
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: 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: 304986
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23420

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.1.167/6.6.130/6.12.77/6.18.17/6.19.7/7.0-rc3
Patch: 7ab511003c5ae3bf5364d7699a2e3ab1db513680/aca4c9e4901b01b8b985993dc7df80bd1d1338bd/5feeea59ed142e15c3284d0b1a364c6786bf3487/fcef983ad88832f3aa83491a174c345de57afbbd/1a1c28a08d74716f3f8e3a21c86b30d0ff13521a/72c6df8f284b3a49812ce2ac136727ace70acc7c

Timelineinfo

01/13/2026 CVE reserved
04/03/2026 +79 days Advisory disclosed
04/03/2026 +0 days VulDB entry created
06/24/2026 +82 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23420 (🔒)
GCVE (CVE): GCVE-0-2026-23420
GCVE (VulDB): GCVE-100-355095
EUVD: 🔒
CERT Bund: WID-SEC-2026-0985 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 04/03/2026 17:03
Updated: 06/24/2026 22:19
Changes: 04/03/2026 17:03 (58), 04/07/2026 20:41 (2), 04/08/2026 01:59 (7), 04/19/2026 23:44 (1), 05/11/2026 16:24 (1), 06/24/2026 22:19 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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