Preface: Janet has a small footprint: it fits in environments where 2.5 MB of RAM is considered “plenty”. While Janet does not run on the GPU (it is a CPU-bound language), it is often used as the control/orchestration layer on heterogeneous AI platforms. Because Janet is written in C and compiles to a small binary (roughly 200–300 KB), it is frequently used on ARM Cortex-based systems. While Janet does not run on the GPU (it is a CPU-bound language), it is often used as the control/orchestration layer on heterogeneous AI platforms.
Background: Janet can be used to manage the data pipeline, calling into C/C++ libraries that handle heavy GPU lifting via CUDA. If code allow external scripts or users to submit code dynamically, it can use Janet’s built-in eval-string function. Does it vulnerable to CVE-2026-2242.
My speculation: Using eval-string does expose your Jetson pipeline to CVE‑2026‑2242, because:
CVE‑2026‑2242 is triggered during compilation of Janet code, and eval-string compiles code dynamically. If a malicious user submits a specially-crafted Janet expression that enters the vulnerable path inside:
janetc_if → specials[.]c
then Janet may perform an out‑of‑bounds read, which can cause:
- interpreter crash
- denial of service
- undefined behavior inside the Janet process
Even though the CVE requires “local execution,”
-allowing remote users to submit code and then calling eval-string makes that local execution possible.
Therefore, theJetson pipeline becomes exploitable.
Vulnerability details: A vulnerability was determined in janet-lang janet up to 1.40.1. This impacts the function janetc_if of the file src/core/specials.c. Executing a manipulation can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called c43e06672cd9dacf2122c99f362120a17c34b391. It is advisable to implement a patch to correct this issue.
Official announcement: Please refer to the link for more details –