VDB-324075 · CVE-2023-53203 · WID-SEC-2025-2053

Linux Kernel up to 6.2.2 wifi mt7996_mac_write_txwi null pointer dereference

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5.5	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.2.2 and classified as critical. This issue affects the function mt7996_mac_write_txwi of the component wifi. Performing a manipulation results in null pointer dereference. This vulnerability is known as CVE-2023-53203. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.2.2. This affects the function mt7996_mac_write_txwi of the component wifi. 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. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: rely on mt76_connac2_mac_tx_rate_val In order to fix a possible NULL pointer dereference in mt7996_mac_write_txwi() of vif pointer, export mt76_connac2_mac_tx_rate_val utility routine and reuse it in mt7996 driver.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2023-53203 since 09/15/2025. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 6.2.3 eliminates this vulnerability. Applying the patch 0765b5b4719f0435bb019370b317d2fb8138eb34/0b8e2d69467f78a7c9d87b452220e87012435e33 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 vulnerability database at CERT Bund (WID-SEC-2025-2053). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

Debian Linux
Amazon Linux 2
Red Hat Enterprise Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
IBM QRadar SIEM
SUSE openSUSE
Open Source Linux Kernel
RESF Rocky Linux
Dell Secure Connect Gateway
F5 F5OS

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

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

AV	AC	Au	C	I	A
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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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.2.3
Patch: 0765b5b4719f0435bb019370b317d2fb8138eb34/0b8e2d69467f78a7c9d87b452220e87012435e33

Timelineinfo

09/15/2025 🔍
09/15/2025 +0 days 🔍
09/15/2025 +0 days 🔍
01/10/2026 +117 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-53203 (🔍)
GCVE (CVE): GCVE-0-2023-53203
GCVE (VulDB): GCVE-100-324075
CERT Bund: WID-SEC-2025-2053 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 09/15/2025 18:17
Updated: 01/10/2026 21:16
Changes: 09/15/2025 18:17 (59), 12/05/2025 10:18 (10), 12/29/2025 02:00 (7), 01/10/2026 21:16 (1)
Complete: 🔍
Cache ID: 216::103

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