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CVE-2025-4287— PyTorch nccl.py torch.cuda.nccl.reduce denial of service

Quick assessment

Affected
n/a PyTorch
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.

PyTorch是PyTorch开源的一个 Python 包。 PyTorch 2.6.0+cu124版本存在安全漏洞，该漏洞源于文件torch/cuda/nccl.py中函数torch.cuda.nccl.reduce处理不当，可能导致拒绝服务攻击。

CVSS 3.3 · Low EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-4287

Vulnerability Information
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Vulnerability Title
PyTorch nccl.py torch.cuda.nccl.reduce denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in PyTorch 2.6.0+cu124. It has been rated as problematic. Affected by this issue is the function torch.cuda.nccl.reduce of the file torch/cuda/nccl.py. The manipulation leads to denial of service. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. The patch is identified as 5827d2061dcb4acd05ac5f8e65d8693a481ba0f5. It is recommended to apply a patch to fix this issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当的资源关闭或释放
Source: CVE Program / CVE List V5
Vulnerability Title
PyTorch 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
PyTorch是PyTorch开源的一个 Python 包。 PyTorch 2.6.0+cu124版本存在安全漏洞，该漏洞源于文件torch/cuda/nccl.py中函数torch.cuda.nccl.reduce处理不当，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- PyTorch 2.6.0+cu124 -

II. Public POCs for CVE-2025-4287

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III. Intelligence Information for CVE-2025-4287

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Patches & Fixes for CVE-2025-4287 (1)

Vendor Advisories for CVE-2025-4287 (1)

Other References for CVE-2025-4287 (1)

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Showing top 20 of 46 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: PyTorch
Same vendor: n/a
Same weakness: CWE-404

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