CVE-2026-24747
PyTorch Vulnerable to Remote Code Execution via Untrusted Checkpoint Files
Impact
### Summary A vulnerability in PyTorch's `weights_only` unpickler allows an attacker to craft a malicious checkpoint file (`.pth`) that, when loaded with `torch.load(..., weights_only=True)`, can corrupt memory and potentially lead to arbitrary code execution. ### Vulnerability Details The `weights_only=True` unpickler failed to properly validate pickle opcodes and storage metadata, allowing: 1. **Heap memory corruption** via `SETITEM`/`SETITEMS` opcodes applied to non-dictionary types 2. **Storage size mismatch** between declared element count and actual data in the archive ### Impact An attacker who can convince a user to load a malicious checkpoint file may achieve arbitrary code execution in the context of the victim's process. # Credit Ji'an Zhou
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | pytorch | < 2.10.0 | 2.10.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Linuxfoundation | Pytorch | before 2.10.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/pytorch/pytorch/163122/commit/954dc5183ee9205cbe79876ad05dd2d9ae752139
- https://github.com/pytorch/pytorch/issues/163105
- https://github.com/pytorch/pytorch/releases/tag/v2.10.0
- https://github.com/pytorch/pytorch/security/advisories/GHSA-63cw-57p8-fm3p
- https://access.redhat.com/errata/RHSA-2026:24977
- https://access.redhat.com/security/cve/CVE-2026-24747
- https://bugzilla.redhat.com/show_bug.cgi?id=2433612
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24747.json
- https://github.com/advisories/GHSA-63cw-57p8-fm3p
- https://nvd.nist.gov/vuln/detail/CVE-2026-24747