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Vulnerability · Published May 5, 2025 · Assigned by VulDB

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

Low 3.3

In plain English

A low-severity security flaw in PyTorch. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).

Severity (CVSS 3.1)3.3Low
Exploit odds (30 days)0.2%top 91.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12pytorchno fix listedDEBIAN-CVE-2025-4287
Debian:13pytorchno fix listedDEBIAN-CVE-2025-4287
Debian:14pytorchno fix listedDEBIAN-CVE-2025-4287
Ubuntu:22.04:LTSpytorchno fix listedUBUNTU-CVE-2025-4287
Ubuntu:25.10pytorchno fix listedUBUNTU-CVE-2025-4287
Ubuntu:26.04:LTSpytorchno fix listedUBUNTU-CVE-2025-4287
Ubuntu:26.10pytorchno fix listedUBUNTU-CVE-2025-4287

Affected products (as reported)

VendorProductVersions
n/a PyTorch 2.6.0+cu124

Weakness: CWE-404 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References