CVE-2026-2664 is a medium-severity vulnerability classified as CWE-125 (Out-of-bounds Read) found in the grpcfuse kernel module embedded within the Linux virtual machine that Docker Desktop uses across Windows, Linux, and macOS platforms. The grpcfuse module facilitates file system operations between the host and the containerized Linux environment. The vulnerability arises from improper bounds checking during read operations, allowing a local attacker with limited privileges to perform out-of-bounds reads. This can lead to unauthorized writes to /proc/docker entries, a critical interface for Docker's internal process management. While the exact impact is unspecified, such unauthorized writes could disrupt Docker's operation or leak sensitive information. The vulnerability does not require user interaction or elevated privileges beyond local access, making it a risk primarily for users who already have some level of system access. Docker addressed this issue in version 4.62.0 of Docker Desktop by correcting the bounds checking in grpcfuse, eliminating the out-of-bounds read condition. No public exploits have been reported, but the presence of this flaw in a widely used container management tool underscores the importance of timely patching.

The vulnerability could allow local attackers to interfere with Docker Desktop's internal process management by writing to /proc/docker entries, potentially leading to denial of service, data leakage, or unauthorized modification of Docker's runtime state. Organizations relying on Docker Desktop for development, testing, or production container management may experience disruptions or compromise of container isolation boundaries if exploited. Although exploitation requires local access, the widespread use of Docker Desktop in enterprise environments means that insider threats or compromised user accounts could leverage this flaw to escalate impact. The unspecified nature of the impact suggests that the vulnerability could be leveraged in various attack scenarios, including container escape or privilege escalation within the Linux VM. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits over time. Overall, the vulnerability poses a moderate risk to confidentiality, integrity, and availability of containerized workloads managed via Docker Desktop.

1. Upgrade Docker Desktop to version 4.62.0 or later immediately to apply the official fix for CVE-2026-2664. 2. Restrict local access to systems running vulnerable Docker Desktop versions to trusted users only, minimizing the risk of exploitation by untrusted local actors. 3. Monitor /proc/docker and related system interfaces for unusual write activity that could indicate exploitation attempts. 4. Employ host-based intrusion detection systems (HIDS) to detect anomalous kernel module behavior or unauthorized modifications to Docker-related processes. 5. Enforce strict user privilege management and limit the use of Docker Desktop to necessary personnel to reduce the attack surface. 6. Regularly audit Docker Desktop configurations and update policies to ensure compliance with security best practices. 7. Consider isolating development environments using Docker Desktop from sensitive production systems to contain potential impacts. 8. Stay informed about any emerging exploit reports or additional patches related to this vulnerability.