CVE-2026-92843 is a vulnerability in Eclipse Threadx Netx Duo
Published on October 20, 2026
Out-of-bounds Read via the TLS 1.3 Certificate extensions_length in NetX Secure
A missing bounds check in the TLS 1.3 Certificate-message parser of NetX Secure lets a malicious TLS 1.3 server trigger an unsigned-integer underflow and a subsequent heap out-of-bounds read in any peer that processes a remote Certificate message. It is reachable pre-authentication, during the normal handshake, before certificate verification completes.
Vulnerability Analysis
CVE-2026-92843 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Out-of-bounds Read
The software reads data past the end, or before the beginning, of the intended buffer. Typically, this can allow attackers to read sensitive information from other memory locations or cause a crash. A crash can occur when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string. The expected sentinel might not be located in the out-of-bounds memory, causing excessive data to be read, leading to a segmentation fault or a buffer overflow. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent read operation then produces undefined or unexpected results.
Products Associated with CVE-2026-92843
Want to know whenever a new CVE is published for Eclipse Threadx Netx Duo? stack.watch will email you.
Affected Versions
Eclipse Foundation Eclipse ThreadX - NetX Duo:- Before and including 6.5.1.202602 is affected.
- Version 6.5.2.202603 is unaffected.