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CVE-2025-3730— PyTorch LossCTC.cpp torch.nn.functional.ctc_loss 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版本存在安全漏洞，该漏洞源于文件aten/src/ATen/native/LossCTC.cpp中函数torch.nn.functional.ctc_loss可能导致拒绝服务。

CVSS 3.3 · Low EPSS 0.33% · P24

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2025-3730

Vulnerability Information
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Vulnerability Title
PyTorch LossCTC.cpp torch.nn.functional.ctc_loss denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability, which was classified as problematic, was found in PyTorch 2.6.0. Affected is the function torch.nn.functional.ctc_loss of the file aten/src/ATen/native/LossCTC.cpp. The manipulation leads to denial of service. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The name of the patch is 46fc5d8e360127361211cb237d5f9eef0223e567. It is recommended to apply a patch to fix this issue. The security policy of the project warns to use unknown models which might establish malicious effects.
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版本存在安全漏洞，该漏洞源于文件aten/src/ATen/native/LossCTC.cpp中函数torch.nn.functional.ctc_loss可能导致拒绝服务。
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 -

II. Public POCs for CVE-2025-3730

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III. Intelligence Information for CVE-2025-3730

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Patches & Fixes for CVE-2025-3730 (2)

Vendor Advisories for CVE-2025-3730 (3)

Other References for CVE-2025-3730 (2)

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IV. Related Vulnerabilities

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

V. Comments for CVE-2025-3730

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