CVE-2025-4287

Name	CVE-2025-4287
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 (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1104931

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
pytorch (PTS)	bullseye	1.7.1-7	vulnerable
	bookworm	1.13.1+dfsg-4	vulnerable
	trixie, sid	2.6.0+dfsg-7	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
pytorch	source	(unstable)	(unfixed)			1104931

[bookworm] - pytorch <no-dsa> (Minor issue)
https://github.com/pytorch/pytorch/issues/150836
https://github.com/pytorch/pytorch/pull/150923