CVE-2026-102757 Privilege escalation in ThreadX
An unprivileged ThreadX module can bypass memory protection to execute privileged memory operations, allowing privilege escalation and potential code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-102757?
CVE-2026-102757 is a high-severity vulnerability in Eclipse Foundation ThreadX, published on 29 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An unprivileged, memory-protected ThreadX module can have the kernel read and write memory at addresses of its choosing, in privileged mode, and can use that to clear the MPU enable bit and remove its own isolation boundary.
The Module Manager decided whether a privileged service could dereference an object address a module named by asking only whether that address fell outside the module. The manager's object pool is outside every module, so the test was satisfied by an address shifted into the interior of one of the module's own privileged allocations, which denotes no object at all. The bytes such an address presents as a control block are bytes the module put there through ordinary create and set services, so the control block ID at the front of them could be made to read as any type the module chose, and the `_txe_` layer's ID test then agreed. The reported chain uses that to reach a privileged `memset` across an attacker-chosen range.
Which versions are affected by CVE-2026-102757?
How do I fix CVE-2026-102757?
No fix has been published for CVE-2026-102757 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-102757 being exploited?
There is no known exploitation of CVE-2026-102757 in the wild and no public exploit code.
Sources
Also known as GHSA-j3fp-8rcq-xfj5, GHSA-rrjj-jwcw-hvf8.