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CVE-2026-111736— NULL pointer dereference on implicit read of user specific record index

Quick assessment

Affected
RT-Labs P-Net
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.

在版本 1.0.3 之前的 P-Net 中，当应用程序已注册读取回调函数时，若处理一个针对用户特定记录索引的隐式读取请求，且该请求缺少有效的目标 AR UUID，则 pf_fspm_cm_read_ind() 函数会尝试解引用一个为 NULL 的 AR 指针。远程未认证攻击者可发送此类请求，导致设备崩溃，从而引发拒绝服务（DoS）攻击。

CVSS 8.7 · High

Possible ATT&CK Techniques 1 AI

T1499.006

Affected Version Matrix 1

VendorProduct Version RangeStatus
RT-Labs P-Net < 1.0.3 affected
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I. Basic Information for CVE-2026-111736

Vulnerability Information
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Vulnerability Title
NULL pointer dereference on implicit read of user specific record index
Source: CVE Program / CVE List V5
Vulnerability Description
P-Net before 1.0.3 dereferences a NULL AR pointer in pf_fspm_cm_read_ind() when handling an implicit read request without a valid target AR UUID for a user specific record index, if the application has registered a read callback. A remote unauthenticated attacker can send such a request to crash the device (denial of service).
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
空指针解引用
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
RT-Labs P-Net 0 ~ 1.0.3 -

II. Public POCs for CVE-2026-111736

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-111736

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Other References for CVE-2026-111736 (1)

Same Patch Batch · RT-Labs · 2026-10-29 · 11 CVEs total

CVE-2026-111732 9.3 CRITICAL Out-of-bounds write when parsing AR Vendor Block requests
CVE-2026-111733 8.7 HIGH NULL pointer dereference on implicit read of AR specific record index
CVE-2026-111731 8.7 HIGH Infinite loop when reading PDPortDataCheck record of subslot 0
CVE-2026-112200 8.7 HIGH Resource exhaustion from unreleased AR and RPC session on RPC requests with incorrect endi
CVE-2026-115793 8.7 HIGH Resource exhaustion from RPC sessions kept for requests to unknown interface
CVE-2026-111730 7.2 HIGH Out-of-bounds write in CheckPeers block parser due to unvalidated peer station name length
CVE-2026-111735 7.1 HIGH Integer underflow leads to out-of-bounds read in pf_cpm_c_data_ind()
CVE-2026-111734 7.1 HIGH Missing length validation of EtherType, VLAN and FrameID fields in pf_eth_recv()
CVE-2026-115795 5.3 MEDIUM Out-of-bounds read of DCP block header in DCP Set and Identify request parsing
CVE-2026-115794 2.3 LOW Alarm data length not validated against received frame length

IV. Related Vulnerabilities

Same product: P-Net
Same vendor: RT-Labs
Same weakness: CWE-476