PyTorch torch.jit.jit_module_from_flatbuffer memory corruption
Priority MEDIUM 55CWE-119Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
A vulnerability classified as problematic has been found in PyTorch 2.6.0. Affected is the function torch.jit.jit_module_from_flatbuffer. The manipulation leads to memory corruption. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0028 20th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | PyTorch | 2.6.0 | — | No fix listed | CNA |
- PyTorch Vendor— Affected 2.6.0 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2025-3121
- 2026-10-03 Alias added: GHSA-qcc7-ch57-rh8j
References
More backstage Pytorch vulnerabilities
- TI-2024-32257 In PyTorch <=2.4.1, the RemoteModule has Deserialization RCE. CVSS 3.1CRITICAL 9.8
- TI-2025-35037 A Name Error occurs in pytorch v2.7.0 when a PyTorch model consists of torch.cummin and… CVSS 3.1HIGH 7.5
- TI-2025-35034 A syntax error in the component proxy_tensor.py of pytorch v2.7.0 allows attackers to cause a Denial of Service (DoS). CVSS 3.1HIGH 7.5
- TI-2025-35033 pytorch v2.8.0 was discovered to display unexpected behavior when the components… CVSS 3.1HIGH 7.5
- TI-2025-35032 An issue in the component torch.linalg.lu of pytorch v2.8.0 allows attackers to cause a… CVSS 3.1HIGH 7.5
- TI-2025-35038 A buffer overflow occurs in pytorch v2.7.0 when a PyTorch model consists of… CVSS 3.1HIGH 7.5
Sources
- CVE-2025-3121 · CVE Program
- CVE-2025-3121 · NVD
- FIRST EPSS
- GHSA-qcc7-ch57-rh8j · GitHub Advisory Database · CC BY 4.0
- CVE-2025-3121 · Red Hat security data · CC BY 4.0
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