Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-111732— Out-of-bounds write when parsing AR Vendor Block requests

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.

在启用 选项编译时，P-Net 1.0.3 之前的版本会从 请求中解析一个不属于该块定义字段的数据长度，并将其直接用作向固定大小缓冲区复制数据的字节数，且未将该长度与缓冲区大小或块长度进行比较。精心构造的 请求可导致缓冲区越界写入，进而引发程序崩溃（拒绝服务攻击），甚至可能实现任意代码执行。 该选项默认处于禁用状态。

CVSS 9.3 · Critical

Affected Version Matrix 1

VendorProduct Version RangeStatus
RT-Labs P-Net < 1.0.3 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-111732

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Out-of-bounds write when parsing AR Vendor Block requests
Source: CVE Program / CVE List V5
Vulnerability Description
P-Net before 1.0.3, when built with PNET_OPTION_AR_VENDOR_BLOCKS enabled, parses a data length from a field of the ARVendorBlock request that is not part of the block definition and uses it as the number of bytes to copy into a fixed-size buffer, without comparing it with the buffer size or the block length. A crafted Connect request causes an out-of-bounds write. This can lead to a crash (denial of service) or potentially arbitrary code execution. This option is disabled by default.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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-2026-111732

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-111732

请登录查看更多情报信息。

Other References for CVE-2026-111732 (1)

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

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
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