CVE-2025-3730

Name	CVE-2025-3730
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 (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1103455

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
	sid, trixie	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)			1103455

Notes

[bookworm] - pytorch <no-dsa> (Minor issue)
[bullseye] - pytorch <postponed> (Minor issue; DoS)
https://github.com/pytorch/pytorch/issues/150835
https://github.com/pytorch/pytorch/pull/150981
https://github.com/pytorch/pytorch/commit/01f226bfb8f2c343f5c614a6bbf685d91160f3af