CVE-2026-102761
9.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Summary
NetX Duo's WebSocket client resets the unmasking cursor to the first NX_PACKET each time it advances through a chained packet, while the loop's upper bound belongs to the current packet. With the standard contiguous packet-pool layout, a masked server frame split across two packets therefore drives the XOR loop through the first packet's unused payload area and on through the second packet's NX_PACKET control block.
The four-byte WebSocket masking key controls the bytes written, so the corruption is attacker-chosen rather than incidental.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Eclipse Foundation | NetX Duo | 6.2.0 <= 6.5.1.202602 | affected |
| Eclipse Foundation | NetX Duo | 6.5.2.202603 | unaffected |
Weaknesses
- CWE-787: CWE-787 Out-of-bounds Write
References
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