Out-of-bounds read memory leak in EnOcean SmartServer IoT IP-852 extended-header parsing
CVE-2026-22885 is an information disclosure vulnerability affecting EnOcean SmartServer IoT version 4.60.009 and earlier, and reportedly related legacy i.LON devices implementing the same IP-852/LonTalk handling. The flaw is in extended-header parsing for LON IP-852 management messages, specifically in LtIpPktHeader::parse in LtIpPackets.cpp. The parser trusts the user-controlled extndHdrSize field and advances the payload offset by extndHdrSize multiplied by four without sufficient bounds validation. Because incoming IP-852 packets are processed from a stack-based buffer, a specially crafted packet can cause the device to parse and later echo data from unintended stack memory rather than the intended payload. Claroty Team82 reported that the proprietary PKTTYPE_TIMESYNCHREQ (0xF1) request / PKTTYPE_TIMESYNCHRSP (0xF2) response path can be abused to disclose stack memory. This is consistent with an out-of-bounds read leading to a memory leak from process memory.
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Recent activity
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A security bypass flaw affecting EnOcean SmartServer and outdated i.LON devices that could be used to circumvent memory defenses and expose memory, contributing to remote compromise of building management and automation systems.
An information disclosure vulnerability in EnOcean SmartServer IoT and i.LON devices caused by insufficient boundary checking in IP-852 extended header parsing, enabling stack memory leakage and ASLR bypass.
A vulnerability in EnOcean SmartServer IoT (<= 4.60.009) where specially crafted LON IP-852 management messages can trigger a memory leak.
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