The update enforces a hardware-anchored secure boot. If the KLD6 detects an unsigned bootloader or corrupted hash in the application partition, it will enter "brick-proof recovery mode" (automatic rollback to the last known good image stored in Bank B).
v3.05 allowed unlimited nested interrupts, which could overflow the kernel stack under high I/O load (e.g., NVMe + GPU + network). v3.06 introduces:
No measurable performance regression for typical workloads (1000–5000 interrupts/sec).
In v3.05, all IPC went through a synchronous capability-passing path: sender → kernel → receiver. For messages > 256 bytes, this incurred two extra copies and a full scheduler invocation. Mtcc-kld6-v3.06 Update
The MTCC-KLD6-V3.06 update specifically addresses two CVEs:
| CVE ID | Severity | Description | Mitigation in V3.06 | | :--- | :--- | :--- | :--- | | CVE-2024-8972 | High (8.2) | Unrestricted upload of dangerous file types via web configuration interface. | Implemented MIME type whitelisting and scan engine. | | CVE-2024-11034 | Critical (9.1) | Use of hard-coded cryptographic key in the firmware update mechanism. | Replaced static key with per-device TPM-derived ephemeral key. |
Action Required: All units currently on V3.03 or earlier must update to V3.06 via the secure local service port first. Over-the-air (OTA) updates are disabled for these vulnerable versions. The update enforces a hardware-anchored secure boot
mount /dev/sda1 /mnt cp /mnt/MTCC-KLD6-v3.06.bin /firmware/update.bin sync && reboot
After reboot, confirm success:
systemctl status mtcc-core | grep "v3.06"
| Flag | Default | Effect |
|------|---------|--------|
| KLD6_SCHED_DETERMINISTIC | ON | Enables jitter-bounding scheduler |
| KLD6_IPC_RINGS | ON | Enables ring buffer IPC |
| KLD6_SYSCALL_CFI | ON (if HW support) | Hardware CFI for syscalls |
| KLD6_TLB_TAGGED | ON | Tagged TLB with eager flush | Before a real-time thread is created
Early adopters in the automotive assembly sector report a 62% reduction in unexpected watchdog resets. However, a user in the HVAC industry noted that the new brownout detector is overly sensitive; it triggered a system event during a high-inductive motor start.
MTCC Response: The sensitivity can be tuned via new system register SYS.BNV.THRESHOLD (default 18.5V, adjustable down to 16.0V via the param.cfg file).
Before a real-time thread is created, the kernel verifies:
[
\sum_i=1^n \fracC_iT_i \le M \cdot (1 - \delta)
]
where (C_i) = worst-case execution time, (T_i) = period, (M) = number of cores, (\delta = 0.15) (scheduling overhead factor). If violated, kld6_thread_create returns -ENOSCHED.