CVE-2025-4287

PyTorch nccl.py torch.cuda.nccl.reduce denial of service

LOW
3.3
CVSS Score
Published: May 5, 2025 at 08:00 PM UTC
Updated: June 17, 2026 at 09:32 AM UTC
1 product affected across 1 vendorPytorch

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Severity
LOW3.3
Exploit prediction
EPSS 0.2%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

2.6.0+cu124

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.3LOWVulDB
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-404

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