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CVE PROGRAM SOURCE RECORD9.3 Critical

CVE-2026-102761

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

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Status
Published
Published
Updated
Assigning organization
eclipse

Description

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Eclipse Foundation NetX Duo

Default version status: unaffected

  • 6.2.0 to ≤ 6.5.1.202602affected
  • 6.5.2.202603unaffected

References