CVE-2025-2149 PyTorch Quantized Sigmoid Module nnq_Sigmoid initialization
Improper initialization in PyTorch's quantized sigmoid module allows local attackers to manipulate scale and zero-point arguments, potentially causing unexpected behavior.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-2149?
CVE-2025-2149 is a low-severity vulnerability in PyTorch, published on 10 Mar 2025. It can only be exploited from the same machine or local network, with no action from the victim.
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 nnq_Sigmoid of the component Quantized Sigmoid Module. The manipulation of the argument scale/zero_point leads to improper initialization. The attack needs to be approached locally. The complexity of an attack is rather high. The exploitation is known to be difficult. The exploit has been disclosed to the public and may be used.
Weakness: CWE-665
Which versions are affected by CVE-2025-2149?
4 open source packages ship an affected version, including pytorch and torch. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pytorch Bitnami | From 2.6.0 | 2.7.0 |
torch PyPI | All versions to 2.6.0 | None |
torch PyPI | All versions to 2.6.0 | None |
torch PyPI | All versions to 2.6.0-cu124 | None |
Products include Linuxfoundation Pytorch.
How do I fix CVE-2025-2149?
Upgrade pytorch to 2.7.0 or later.
Is CVE-2025-2149 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-2149 exists.
Other vulnerabilities in PyTorch
- CVE-2024-48063 Deserialization in n/a
- CVE-2022-45907 PyTorch vulnerable to arbitrary code execution
- CVE-2025-32434 PyTorch: `torch.load` with `weights_only=True` leads to remote code execution
- CVE-2026-24747 PyTorch Vulnerable to Remote Code Execution via Untrusted Checkpoint Files
- CVE-2024-31583 Pytorch use-after-free vulnerability
Sources
Also known as BIT-pytorch-2025-2149, DEBIAN-CVE-2025-2149, ECHO-a0c5-9cb9-6a53, GHSA-x3gm-94wq-g975, PYSEC-2025-190, UBUNTU-CVE-2025-2149.