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CVE-2026-115794— Alarm data length not validated against received frame length

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，当处理接收到的 RTA 告警帧时，系统会将从帧的可变部分长度字段导出的数据长度传递给应用层的告警回调函数，而未将其与实际接收帧的长度进行校验。若接收到短帧，回调函数可能接收到高达 65507 字节的长度值。若应用程序依据该报告长度复制数据，则会发生读取超出接收缓冲区末尾的情况（即缓冲区越界读取）。攻击者必须已建立应用关系（Application Relationship），并具备相邻网络（ADJACENT）访问权限。不使用告警数据的应用程序不受此漏洞影响。

CVSS 2.3 · Low

Affected Version Matrix 1

VendorProduct Version RangeStatus
RT-Labs P-Net < 1.0.3 affected
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I. Basic Information for CVE-2026-115794

Vulnerability Information
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Vulnerability Title
Alarm data length not validated against received frame length
Source: CVE Program / CVE List V5
Vulnerability Description
P-Net before 1.0.3 passes the application alarm callback a data length derived from the variable part length field of a received RTA alarm frame without checking it against the length of the received frame. A short frame can make the callback receive a length of up to 65507 bytes. An application that copies the reported number of bytes reads past the end of the receive buffer. The attacker must have established an Application Relationship and requires ADJACENT network access. Applications that do not use the alarm data are not affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
长度参数不一致性处理不恰当
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-2026-115794

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III. Intelligence Information for CVE-2026-115794

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Other References for CVE-2026-115794 (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-2026-111736 8.7 HIGH NULL pointer dereference on implicit read of user 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

IV. Related Vulnerabilities

Same product: P-Net
Same vendor: RT-Labs
Same weakness: CWE-130