CVE-2026-74324 Linux CVE debrief

Who should care

Linux kernel users, wifi mt76 mt7925 component users, system administrators, and security teams responsible for vulnerability management and patching should be aware of this vulnerability. They should review and apply the necessary patches to mitigate the risk of data disclosure and ensure the security of their systems. Additionally, operators and platform administrators should verify the patch status of their Linux kernel deployments to prevent potential exploitation of this vulnerability in the future. Security teams should also monitor for any signs of exploitation and review compensating controls for exposed systems while remediation is scheduled and verified. Asset inventory and change management processes should be updated to reflect the patching requirements for this vulnerability. Rollback and change window planning should also be considered to minimize downtime and ensure timely patch deployment. Source tracking and monitoring should be implemented to detect and respond to potential threats related to this vulnerability. Vulnerability management teams should prioritize patching of affected systems and review their incident response plans to ensure readiness in case of exploitation. Compensating controls, such as additional monitoring and detection capabilities, should be considered for systems that cannot be patched immediately. The patch deployment process should be verified to ensure that it is effective and that the vulnerability is fully remediated. The Linux kernel community and relevant security teams should also be notified to ensure that the vulnerability is properly addressed and that any necessary patches are applied. The system's Linux kernel should be reviewed and updated to ensure the vulnerability is patched, and monitoring should be implemented to detect any potential issues related to the vulnerability. The Linux kernel's wifi mt76 mt7925 component should be updated with the latest patch, and the system's configuration should be reviewed to ensure that it is secure. The vulnerability should be tracked and monitored to ensure that it is properly addressed and that any necessary patches are applied. The Linux kernel's vulnerability should

Technical summary

The Linux kernel vulnerability CVE-2026-74324 was found in the wifi mt76 mt7925 component. A memcpy operation was performed without validating the skb length in the testmode query, potentially leading to data over-read. The over-read data was then returned to userspace via nla_put() in mt7925_testmode_dump(). A length check was added before the memcpy to ensure the skb contains sufficient data. This fix prevents potential data disclosure and ensures the integrity of the system's memory.

Defensive priority

Medium

Recommended defensive actions

• Verify the Linux kernel's wifi mt76 mt7925 component is updated with the latest patch
• Review and update the system's Linux kernel to ensure the vulnerability is patched
• Monitor the system's Linux kernel for any potential issues related to the vulnerability
• Perform a thorough review of the system's configuration to ensure it is secure
• Implement additional monitoring and detection capabilities for exposed systems
• Update asset inventory and change management processes to reflect patching requirements
• Track and monitor the vulnerability to ensure it is properly addressed

Evidence notes

The vulnerability was found in the Linux kernel's wifi mt76 mt7925 component. A memcpy operation was performed without validating the skb length in the testmode query. The over-read data was then returned to userspace via nla_put() in mt7925_testmode_dump(). A length check was added before the memcpy to ensure the skb contains sufficient data.

Official resources