CVE-2026-92853— Out-of-bounds Read via a Zero-length TLS 1.3 Certificate Message in NetX Secure
Quick assessment
Affected
Eclipse Foundation Eclipse ThreadX - NetX Duo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
NetX Secure 中的 TLS 1.3 证书消息（Certificate-message）解析器在尚未确认消息中是否存在可跳过的字节的情况下，便通过递减消息长度来跳过上下文字节。因此，零长度的证书消息会导致无符号长度值发生回绕，变为 ，致使随后的边界检查失效，进而导致解析器读取超出会话数据包缓冲区的内存区域。 该漏洞的触发条件仅为四字节的手shake 头部，无需任何密码学有效性验证，且在身份认证之前即可被利用。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-92853
Vulnerability Information
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Vulnerability Title
Out-of-bounds Read via a Zero-length TLS 1.3 Certificate Message in NetX Secure
Source: CVE Program / CVE List V5
Vulnerability Description
The TLS 1.3 Certificate-message parser in NetX Secure decrements the message length to skip a context byte without first establishing that the message has a byte to skip. A zero-length Certificate message therefore wraps the unsigned length to `0xFFFFFFFF`, which makes the bounds check that follows vacuous and sends the parser reading past the session packet buffer.
The trigger is a four-byte handshake header and requires no cryptographic validity. It is reachable pre-authentication.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Eclipse Foundation | Eclipse ThreadX - NetX Duo | 0 ~ 6.5.1.202602 | - |
|
II. Public POCs for CVE-2026-92853
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-92853 (1)
Same Patch Batch · Eclipse Foundation · 2026-10-20 · 29 CVEs total
| CVE-2026-113620 | 9.8 CRITICAL | Eclipse ioFog operator WebSocket accepts an unverified JWT |
| CVE-2026-93475 | 9.3 CRITICAL | Out-of-bounds Write via an Unbounded RSA Modulus in NetX Secure X.509 |
| CVE-2026-94018 | 8.8 HIGH | NetX Duo Web HTTP server releases an uninitialized packet pointer on the PUT Content-Lengt |
| CVE-2026-92843 | 8.7 HIGH | Out-of-bounds Read via the TLS 1.3 Certificate extensions_length in NetX Secure |
| CVE-2026-94192 | 8.5 HIGH | Module object deallocation can free a live ThreadX kernel object |
| CVE-2026-95109 | 8.5 HIGH | Cortex-A7 module data validation checks only the first address of a caller-supplied range |
| CVE-2026-91186 | 8.4 HIGH | PNG decoder: a duplicate IHDR chunk after IDAT resizes the image after allocation, causing |
| CVE-2026-91041 | 7.8 HIGH | FileX fault-tolerant log replay writes past the destination sector when mounting a crafted |
| CVE-2026-113619 | 7.5 HIGH | Eclipse ioFog renders request templates before authentication |
| CVE-2026-91189 | 7.1 HIGH | GUIX binary resource loader: unvalidated glyph range causes an integer underflow and a hea |
| CVE-2026-95107 | 7.0 HIGH | Module object allocation size overflow corrupts the manager object pool |
| CVE-2026-93003 | 6.9 MEDIUM | NetX Duo Web HTTP server interprets request body content as HTTP header fields |
| CVE-2026-108062 | 6.9 MEDIUM | Pre-authentication OIDC discovery and JWKS fetches run synchronously on the asyncio event |
| CVE-2026-94024 | 6.9 MEDIUM | Module Manager object lookup validates one byte of a module's search name |
| CVE-2026-94023 | 6.9 MEDIUM | Module delete dispatchers do not enforce kernel-object ownership before irreversible delet |
| CVE-2026-95108 | 6.8 MEDIUM | Deleting a user-mode module thread leaks its privileged kernel stack |
| CVE-2026-91059 | 6.8 MEDIUM | JPEG decoder: a duplicate SOF0 after SOS publishes a pixelmap that misreports its own allo |
| CVE-2026-92449 | 6.8 MEDIUM | Binary resource loader: unbounded map_id from a theme file causes a heap out-of-bounds wri |
| CVE-2026-92446 | 6.8 MEDIUM | GUIX binary resource loader reads past the end of a resource, because no length for it eve |
| CVE-2026-97400 | 6.8 MEDIUM | jdmpview / DTFJ reads arbitrary local files and makes arbitrary outbound requests when ope |
Showing top 20 of 29 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Eclipse ThreadX - NetX Duo
-
CVE-2026-93003
NetX Duo Web HTTP server interprets request body content as -
CVE-2026-92843
Out-of-bounds Read via the TLS 1.3 Certificate extensions_le -
CVE-2026-94018
NetX Duo Web HTTP server releases an uninitialized packet po -
CVE-2026-93475
Out-of-bounds Write via an Unbounded RSA Modulus in NetX Sec -
CVE-2026-103416
NetX Duo 6.5.1 TLS1.3 会话控制块越界写入漏洞
Same vendor: Eclipse Foundation
-
CVE-2026-93003
NetX Duo Web HTTP server interprets request body content as -
CVE-2026-95107
Module object allocation size overflow corrupts the manager -
CVE-2026-94202
Module block-pool create validates two of the four parameter -
CVE-2026-95108
Deleting a user-mode module thread leaks its privileged kern -
CVE-2026-94024
Module Manager object lookup validates one byte of a module'
Same weakness: CWE-125
-
CVE-2026-94202
Module block-pool create validates two of the four parameter -
CVE-2026-94024
Module Manager object lookup validates one byte of a module' -
CVE-2026-94023
Module delete dispatchers do not enforce kernel-object owner -
CVE-2026-95109
Cortex-A7 module data validation checks only the first addre -
CVE-2026-92843
Out-of-bounds Read via the TLS 1.3 Certificate extensions_le
V. Comments for CVE-2026-92853
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