CVE-2025-2149: PyTorch Quantized Sigmoid Module nnq_Sigmoid initialization

Severity: low (CVSS 2.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-03-10 · updated 2026-06-17
Weakness: CWE-665

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.

Affected products

PyTorch: 2.6.0-cu124

References

https://github.com/pytorch/pytorch/issues/147818
https://github.com/pytorch/pytorch/issues/147818#issue-2877301660
https://vuldb.com/?ctiid.299060
https://vuldb.com/?id.299060
https://vuldb.com/?submit.506563
https://github.com/pytorch/pytorch/issues/147818
https://github.com/pytorch/pytorch/issues/147818#issue-2877301660

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