CVE-2026-47213
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk12th percentile — higher than 12% of all known CVEs
Summary
Boxlite is a sandbox service that allows users to create lightweight virtual machines and launch OCI containers. In versions 0.8.2 and prior, Boxlite uses the SIGALRM signal to terminate processes after a timeout, which can be exploited by malicious code to continue running, leading to resource exhaustion.
Risk Assessment
Malicious code can exploit this vulnerability to keep running after the timeout, affecting the availability of the Boxlite service and leading to resource issues in virtual machines.
Recommendation
It is recommended to update Boxlite to a version that includes the patch to prevent exploitation of this vulnerability by malicious software.
Original NVD description (English source)
Boxlite is a sandbox service that allows users to create lightweight virtual machines (Boxes) and launch OCI containers within them to run untrusted code. In versions 0.8.2 and prior, Boxlite allows users to configure a timeout for services running inside the virtual machine. When the timeout is triggered, Boxlite sends a signal to kill the process. However, instead of using the uncatchable SIGKILL signal, Boxlite uses the catchable SIGALRM signal. Malicious code running inside the sandbox can exploit this vulnerability to continue running after the timeout is triggered, leading to resource exhaustion within the virtual machine and affecting the availability of the Boxlite service. This issue has been patched via commit 28159fc.