{"id":"CVE-2026-111733","kind":"vulnerability","aliases":["CVE-2026-111733"],"related":[],"title":"P-Net: NULL pointer on implicit read request crashes the device","description":"P-Net before 1.0.3 dereferences a NULL AR pointer when handling an implicit read request without a valid target AR UUID for a record index that requires an AR (AR specific indices 0xE000-0xEFFF, and the expected identification data of a slot or subslot). A remote unauthenticated attacker can send such a request to crash the device (denial of service).","summary":"P-Net, an industrial Profinet device stack, dereferences a NULL AR pointer when it receives an implicit read request without a valid target AR UUID for an AR-specific record index. A remote attacker without credentials can send such a request to crash the device, causing denial of service.","severity":"high","cvss":8.7,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["embedded","industrial-control","p-net","package","profinet"],"not_affected_if":["no-profinet-exposure","p-net-1.0.3-or-later"],"how_to_check":"- Check the P-Net version in the device firmware or build configuration; `unknown` if the sources do not say how to read it\n- Confirm whether the device runs P-Net before 1.0.3","fix":"- P-Net: move to `1.0.3` or later","status":"open","published_at":"2026-10-29T16:17:57+00:00","first_seen_at":"2026-10-29T16:25:56+00:00","triaged_at":"2026-10-29T16:29:25+00:00","updated_at":"2026-10-29T16:29:25+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-29T16:29:25Z","model":"claude-haiku-5-5","output":{"fix":"- P-Net: move to `1.0.3` or later","reach":"network","title":"P-Net: NULL pointer on implicit read request crashes the device","impact":"low","summary":"P-Net, an industrial Profinet device stack, dereferences a NULL AR pointer when it receives an implicit read request without a valid target AR UUID for an AR-specific record index. A remote attacker without credentials can send such a request to crash the device, causing denial of service.","audience":"businesses","category":"package","nicknames":[],"who_cares":["profinet","industrial-control","p-net","embedded"],"confidence":0.6,"fix_status":"available","needs_auth":"no","worst_case":"remote crash of the device, denial of service","analyst_note":"Find which vendor products embed P-Net and their fixed firmware versions; the NVD entry alone does not list them.","how_to_check":"- Check the P-Net version in the device firmware or build configuration; `unknown` if the sources do not say how to read it\n- Confirm whether the device runs P-Net before 1.0.3","plain_action":"","needs_analyst":true,"not_affected_if":["p-net-1.0.3-or-later","no-profinet-exposure"],"who_is_affected":"Devices built on P-Net before 1.0.3 that accept Profinet connections from the network are exposed to a remote crash. Systems that do not expose Profinet to untrusted networks have a smaller exposure. The sources do not say which vendor products embed P-Net.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000687,"input_tokens":4147,"output_tokens":545,"severity_before":"high"},"analyst_status":null,"analyst_note":null,"search":"'-111733':15A,18A '-2026':14A,17A '0xe000':113C '0xe000-0xefff':112C '0xefff':114C '1.0.3':83C 'ar':39B,52B,57B,87C,99C,108C,109C 'ar-specif':56B 'attack':63B,128C 'caus':75B 'control':22B 'crash':10A,72B,135C 'credenti':65B 'cve':13A,16A 'data':119C 'denial':76B,138C 'derefer':36B,84C 'devic':12A,34B,74B,137C 'embed':19B 'expect':117C 'handl':90C 'identif':118C 'implicit':7A,45B,92C 'index':60B,104C 'indic':111C 'industri':21B,32B 'industrial-control':20B 'net':3A,25B,30B,81C 'null':4A,38B,86C 'p':2A,24B,29B,80C 'p-net':1A,23B,28B,79C 'packag':26B 'pointer':5A,40B,88C 'profinet':27B,33B 'read':8A,46B,93C 'receiv':43B 'record':59B,103C 'remot':62B,126C 'request':9A,47B,70B,94C,133C 'requir':106C 'send':67B,130C 'servic':78B,140C 'slot':122C 'specif':58B,110C 'stack':35B 'subslot':124C 'target':51B,98C 'unauthent':127C 'uuid':53B,100C 'valid':50B,97C 'without':48B,64B,95C","nicknames":[],"mitigations":[],"who_affected":"Devices built on P-Net before 1.0.3 that accept Profinet connections from the network are exposed to a remote crash. Systems that do not expose Profinet to untrusted networks have a smaller exposure. The sources do not say which vendor products embed P-Net.","tier":"B","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"first_public_at":"2026-10-29T16:17:57+00:00","kev":null,"cvss_vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"4b71179a-3b92-4a9d-b9fc-af8b8ed579ee","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-111733","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111733","severity":null,"published_at":"2026-10-29T16:17:57+00:00","modified_at":"2026-10-29T16:17:57+00:00","first_seen_at":"2026-10-29T16:25:56+00:00","fetched_at":"2026-10-29T16:25:56+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}