CVE-2025-2999 PyTorch torch.nn.utils.rnn.unpack_sequence memory corruption
A local attacker can exploit memory corruption in PyTorch's unpack_sequence function to potentially execute arbitrary code or cause a denial of service.
- 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-2025-2999?
CVE-2025-2999 is a medium-severity memory corruption vulnerability in PyTorch, published on 31 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. It has been rated as critical. Affected by this issue is the function torch.nn.utils.rnn.unpack_sequence. The manipulation leads to memory corruption. Attacking locally is a requirement. The exploit has been disclosed to the public and may be used.
Weakness: CWE-119
Which versions are affected by CVE-2025-2999?
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-NA | None |
torch PyPI | All versions | 2.9.1 |
torch PyPI | All versions | 2.9.1 |
Products include Linuxfoundation Pytorch.
How do I fix CVE-2025-2999?
Upgrade pytorch to 2.7.0 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-2999 being exploited?
There is no known exploitation of CVE-2025-2999 in the wild and no public exploit code.
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-2025-2999, DEBIAN-CVE-2025-2999, ECHO-27c7-eea0-603b, GHSA-vgrw-7cvw-pwgx, PYSEC-2025-193, UBUNTU-CVE-2025-2999.