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CVE-2026-111730— Out-of-bounds write in CheckPeers block parser due to unvalidated peer station name 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 1.0.3 版本之前的 P-Net 中， 函数未对 数据块中的 字段进行验证。该函数直接使用接收到的长度值（最大可达 255 字节）将数据复制到仅 241 字节的对等站名称缓冲区中，并写入终止的空字符（NUL）。因此，经过精心构造的数据块可写入缓冲区末尾之外最多 15 字节。这可能导致程序崩溃（拒绝服务攻击），甚至可能引发任意代码执行。 此漏洞的利用需要建立会话，且要求具备相邻（ADJACENT）网络访问权限。

CVSS 7.2 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
RT-Labs P-Net < 1.0.3 affected
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I. Basic Information for CVE-2026-111730

Vulnerability Information
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Vulnerability Title
Out-of-bounds write in CheckPeers block parser due to unvalidated peer station name length
Source: CVE Program / CVE List V5
Vulnerability Description
P-Net before 1.0.3 does not validate the LengthPeerStationName field of a CheckPeers block in get_check_peer(). The received length (up to 255) was used to copy data into the 241-byte peer station name buffer and to place the terminating NUL byte, so a crafted block writes up to 15 bytes past the end of the buffer. This can lead to a crash (denial of service) or potentially arbitrary code execution. Requires establishment of session that needs ADJACENT network access.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
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-2026-111730

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-111730

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Other References for CVE-2026-111730 (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-2026-111735 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-787