Out-of-Bounds Read Vulnerability in OpenPPL's CUDA Optimizer
CVE-2026-122189

5.3MEDIUM

Key Information:

Vendor

Openppl

Status
Ppl.nn
Vendor
CVE Published:
5 November 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-122189?

A vulnerability exists in the OpenPPL CUDA Optimizer within the OptGraph::InitQuantization function, located in src/ppl/nn/engines/cuda/optimizer/opt_graph.cc. This flaw allows an attacker to manipulate parameters such as per_channel, bit_width, tensor_max, tensor_min, and scale, potentially leading to unauthorized out-of-bounds read operations. The threat can be exploited remotely, as the vulnerability has been publicly disclosed and could be readily utilized by malicious actors. OpenPPL was notified about the issue, but as of yet, no response has been provided regarding any remediation actions.

Affected Version(s)

ppl.nn bb84dc9952809b3a5a0036858a3d9f68af1c83d5

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-122189 - Proof of Concept

References

https://vuldb.com/vuln/431163
vdb-entrytechnical-description
https://vuldb.com/vuln/431163/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-122189
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Dem000000 (VulDB User)
VulDB CNA Team
.