Use-After-Free Vulnerability in Linux Kernel Affecting virt_wifi Devices

CVE-2026-31695

What is CVE-2026-31695?

CVE-2026-31695 is a use-after-free vulnerability identified in the Linux kernel, specifically affecting virt_wifi devices. The Linux kernel serves as the core component of various operating systems, enabling communication between hardware and software. This vulnerability arises from the interaction between the virt_wifi network devices and their underlying hardware components during the unregistering process, posing a significant risk to system stability.

When a virt_wifi device is unregistered, it can lead to a scenario where operations on that network device reference previously freed memory locations. As a result, processes attempting to perform actions on these devices may inadvertently operate on corrupted memory, leading to undefined behavior. This can cause crashes, system instability, and potential unauthorized access to sensitive data, thereby compromising organizational security.

Potential impact of CVE-2026-31695

1. System Instability and Crashes: The use-after-free issue can lead to memory corruption, potentially causing systems to crash or behave unpredictably. This instability might disrupt services and applications relying on virt_wifi devices, affecting operational continuity.

2. Security Vulnerabilities: Exploitation of this vulnerability could open avenues for attackers to execute arbitrary code within the kernel, escalating their privileges and undermining overall system security. This could potentially facilitate unauthorized access to sensitive data or system controls.

3. Denial of Service (DoS) Risk: The improper handling of unregistering virt_wifi devices could also be leveraged to cause denial-of-service conditions. Attackers might exploit this vulnerability to render network services inoperable, impacting business operations that rely heavily on network connectivity.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

This is an advertDeploy the Patch →

References