CVE-2026-95108: medium-severity vulnerability in Eclipse ThreadX
Deleting a user-mode module thread leaks its privileged kernel stack
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.8epss 0.2%
One logical thread of a user-mode ThreadX module costs the Module Manager's shared object pool two allocations, not one. The module asks for a `TX_THREAD` control block through `txm_module_object_allocate`; `_txm_module_manager_thread_create` then takes a second allocation of `TXM_MODULE_KERNEL_STACK_SIZE` bytes for the privileged kernel stack that thread's system calls run on, and records it in the control block. Both come from `_txm_module_manager_object_pool` and both are linked onto the module's allocation list.
The Module Manager's thread-delete dispatcher released only the first. The kernel stack stayed allocated until the whole module was stopped, so a module that creates, terminates and deletes threads in a loop — every state transition valid, every service returning `TX_SUCCESS` — removed a fixed block from a finite pool shared by the manager and by every other loaded module, on every cycle, for as long as it stayed loaded. Once the pool is exhausted, no memory-protected module can create any kernel object and no user-mode module thread can be created anywhere in the system.
Vulnerable function: `_txm_module_manager_tx_thread_delete_dispatch`, in `common_modules/module_manager/inc/txm_module_manager_dispatch.h`.
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
Eclipse Foundation · Eclipse ThreadXRelated CVEs — Eclipse ThreadX
In the same product, most dangerous first.
CVE-2026-115215HIGHNetX Secure DTLS server allocates a session for each new source before the cookie exchange and never reclaims it, so spoofed datagrams exhaust the session poolEPSS 0.4%CVE-2026-115403HIGHNULL pointer dereference in the BSD raw IPv6 send path when the destination table is fullEPSS 0.3%CVE-2026-95107HIGHModule object allocation size overflow corrupts the manager object poolEPSS 0.2%CVE-2026-94202MEDIUMModule block-pool create validates two of the four parameter words it readsEPSS 0.2%CVE-2026-95109HIGHCortex-A7 module data validation checks only the first address of a caller-supplied rangeEPSS 0.1%CVE-2026-94192HIGHModule object deallocation can free a live ThreadX kernel objectEPSS 0.1%