Linux Kernel up to 7.0-rc2 wifi mt76_connac2_mac_write_txwi_80211 out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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3.4$0-$5k1.03

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 7.0-rc2. Affected by this issue is the function mt76_connac2_mac_write_txwi_80211 of the component wifi. Executing a manipulation can lead to out-of-bounds. This vulnerability appears as CVE-2026-23315. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.0-rc2. It has been declared as problematic. This vulnerability affects the function mt76_connac2_mac_write_txwi_80211 of the component wifi. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: Fix possible oob access in mt76_connac2_mac_write_txwi_80211() Check frame length before accessing the mgmt fields in mt76_connac2_mac_write_txwi_80211 in order to avoid a possible oob access. [fix check to also cover mgmt->u.action.u.addba_req.capab, correct Fixes tag]

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-23315 since 01/13/2026. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 303742 (Linux Distros Unpatched Vulnerability : CVE-2026-23315), 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 84419556359bc96d3fe1623d47a64c86542566cc/7ae7b093b7dba9548a3bc4766b9364b97db4732d/7b692dff8df0ba5feb8df00f27d906d6eb1fe627/9612d91f617231e03c49cb9b0c02f975a3b4f51f/0fb3b94a9431a3800717e5c3b6fa2e1045a15029/4e10a730d1b511ff49723371ed6d694dd1b2c785 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 (303742) and CERT Bund (WID-SEC-2026-0861). Once again VulDB remains the best source for vulnerability data.

Affected

  • Open Source Linux Kernel

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
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: Out-of-bounds
CWE: CWE-125 / CWE-119
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: 303742
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23315

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: 84419556359bc96d3fe1623d47a64c86542566cc/7ae7b093b7dba9548a3bc4766b9364b97db4732d/7b692dff8df0ba5feb8df00f27d906d6eb1fe627/9612d91f617231e03c49cb9b0c02f975a3b4f51f/0fb3b94a9431a3800717e5c3b6fa2e1045a15029/4e10a730d1b511ff49723371ed6d694dd1b2c785

Timelineinfo

01/13/2026 CVE reserved
03/25/2026 +71 days Advisory disclosed
03/25/2026 +0 days VulDB entry created
03/30/2026 +5 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23315 (🔒)
GCVE (CVE): GCVE-0-2026-23315
GCVE (VulDB): GCVE-100-353068
CERT Bund: WID-SEC-2026-0861 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 03/25/2026 13:21
Updated: 03/30/2026 06:30
Changes: 03/25/2026 13:21 (59), 03/26/2026 05:35 (7), 03/26/2026 05:57 (2), 03/30/2026 06:30 (1)
Complete: 🔍
Cache ID: 216:178:103

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