CVE-2025-55553 Denial of service in n/a
Attackers can cause a Denial of Service in PyTorch due to a syntax error in proxy_tensor.py, affecting users of the library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-55553?
CVE-2025-55553 is a high-severity denial of service vulnerability in n/a, published on 25 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A syntax error in the component proxy_tensor.py of pytorch v2.7.0 allows attackers to cause a Denial of Service (DoS).
Weakness: CWE-248
Which versions are affected by CVE-2025-55553?
2 open source packages ship an affected version, including pytorch and torch. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pytorch Bitnami | All versions | 2.7.1 |
torch PyPI | All versions | 2.7.1 |
Products include Linuxfoundation Pytorch.
How do I fix CVE-2025-55553?
Upgrade pytorch to 2.7.1 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-55553 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-55553 exists.
Other vulnerabilities in n/a
- 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-2025-55553, DEBIAN-CVE-2025-55553, ECHO-021d-01cc-2164, GHSA-2qm5-pr8v-rjvp, PYSEC-2025-205, UBUNTU-CVE-2025-55553.