CVE-2026-115231

In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, ThreadX Modules does not revoke a module's trace-buffer-full callback when the module is stopped and unloaded. With event tracing enabled and a kernel-owned trace buffer still active, a later buffer wrap invokes the callback from privileged thread context after the module's code has been released, so a user-mode module can have its code run with kernel privileges after unload, or, once the memory is reused, redirect control flow or cause a fault.

In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the Module Manager's thread-control services do not check that a thread passed by a user-mode, memory-protected module belongs to that module. Any loaded module can suspend, resume, terminate, reset or re-prioritise application threads and other modules' threads and abort their waits.

In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the PendSV handler of the Cortex-M module ports saves a preempted user-mode module thread's registers in privileged mode at addresses taken from the thread's stack pointer, without checking that pointer against the thread's stack. A user-mode, memory-protected module can thereby write up to nine words into memory immediately below any region it may write, and read back what is stored there.

In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, the Module Manager loaders return an overflow error without releasing the Module Manager mutex when a module preamble declares a data or stack size that overflows the allocation arithmetic. Loading such an image blocks every later module load, start, stop and unload from other threads until the system is reset.

In the Eclipse ThreadX Module Manager (versions 6.0.1 through 6.5.2.202603), loaders take a module image without its length and trust the sizes and offsets in its preamble. A crafted module image can declare a code size larger than the image to read, or gain access to, the memory that follows it, and can place its entry points outside its code.

In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603 built with TX_ENABLE_EVENT_TRACE, the Module Manager lets a user-mode, memory-protected module register any function pointer as the kernel's trace-buffer-full callback. A malicious module can thereby run its own code with kernel privilege, defeating module isolation, or fault the kernel with an invalid pointer.

In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, four non-secure-callable secure stack functions in TrustZone-M ports dereference a thread pointer supplied by the non-secure world without verifying it points to non-secure memory. Non-secure code can make the secure firmware reveal which secure bytes are zero, write chosen secure words, and fault the secure world, breaking TrustZone-M isolation and enabling recovery of secure-world secrets such as cryptographic keys.

In Eclipse ThreadX before 6.4.3, when memory protection is enabled, syscall parameters verification wasn't enough, allowing an attacker to obtain an arbitrary memory read/write.

In Eclipse ThreadX before version 6.4.3, the thread module has a setting of maximum priority. In some cases the check of that maximum priority wasn't performed, allowing, as a result, to obtain a thread with higher priority than expected and causing a possible denial of service.

In Eclipse ThreadX before version 6.4.3, an attacker can cause a denial of service (crash) by providing a pointer to a reserved or unmapped memory region. Vulnerable system calls had a check of pointers, but that check wasn't verifying whether the pointer is outside the module memory region.