CVE-2026-95111: CWE-125 Out-of-bounds Read in Eclipse Foundation Eclipse ThreadX
Description
A memory-protected ThreadX module's queue request reaches the Module Manager's dispatch layer, which decides how much of the module's buffer the privileged queue copy may touch and hands that extent to the module port's range check. A queue's `tx_queue_message_size` is a count of `ULONG`s and the copy moves that many words, so the extent is `message_size * sizeof(ULONG)` bytes. The front-send dispatcher passed the word count itself. `tx_queue_send` and `tx_queue_receive`, either side of it in the same header, have always multiplied. A source buffer ending `message_size` bytes into memory the module may read was therefore accepted, and `_txe_queue_front_send` then read `message_size * sizeof(ULONG)` bytes from it in privileged mode — `3 * message_size` bytes past the end of what the module is allowed to read. The words are written into the queue's message area, so a module that can receive from that queue reads them back.
CVSS v4.0
Score 4.8medium
Affected software
Eclipse Foundation
Eclipse ThreadX
pkg:github/eclipse-threadx/threadxRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability involves a memory-protected ThreadX module's queue request reaching the Module Manager's dispatch layer, which determines the allowed buffer extent for privileged queue copying. The queue's message size is counted in ULONG units, and the copy operation moves that many words. However, the front-send dispatcher erroneously passed the word count directly without multiplying by sizeof(ULONG), unlike related functions tx_queue_send and tx_queue_receive. Consequently, _txe_queue_front_send reads three times the intended number of bytes past the allowed memory boundary in privileged mode, writing these out-of-bounds bytes into the queue's message area. A module receiving from this queue can then read these unintended bytes, causing an out-of-bounds read (CWE-125).
Potential Impact
This vulnerability allows a privileged module to read memory beyond its authorized buffer, potentially exposing sensitive data or causing undefined behavior. The CVSS vector indicates local attack vector with low complexity, requiring low privileges and no user interaction. The impact is limited to information disclosure or memory corruption within the local system context.
Mitigation Recommendations
No vendor advisory or patch information is provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid running untrusted or less-trusted modules with privileged queue access, and monitor for updates from the Eclipse Foundation regarding patches or mitigations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- eclipse
- Date Reserved
- 2026-09-23T13:43:25.627Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad782ec2cdf04f65638aa44
Added to database: 10/20/2026, 15:04:12 UTC
Last enriched: 10/20/2026, 15:18:39 UTC
Last updated: 10/20/2026, 19:06:08 UTC
Views: 7
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