PyTorch pt2 Loading deserialization
Published Mar 22, 2026
4.8
MEDIUMCVSS 4.0
EPSS 0.40%
Description
A vulnerability was identified in PyTorch 2.10.0. The affected element is an unknown function of the component pt2 Loading Handler. The manipulation leads to deserialization. The attack can only be performed from a local environment. The exploit is publicly available and might be used. The project was informed of the problem early through a pull request but has not reacted yet.
Affected products
- Vendor n/a Product PyTorch Defaultn/a
- Version 2.10.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | PyTorch | n/a |
|
- 2.10.0
No data.
Red Hat AI Inference Server
rhaiis/vllm-cpu-rhel9
Not affected
Red Hat AI Inference Server
rhaiis/vllm-cuda-rhel9
Not affected
Red Hat AI Inference Server
rhaiis/vllm-rocm-rhel9
Not affected
Red Hat AI Inference Server
rhaiis/vllm-tpu-rhel9
Not affected
Red Hat Enterprise Linux AI (RHEL AI) 3
rhelai3/bootc-aws-cuda-rhel9
Not affected
Red Hat Enterprise Linux AI (RHEL AI) 3
rhelai3/bootc-azure-cuda-rhel9
Not affected
Red Hat Enterprise Linux AI (RHEL AI) 3
rhelai3/bootc-azure-rocm-rhel9
Not affected
Red Hat Enterprise Linux AI (RHEL AI) 3
rhelai3/bootc-cuda-rhel9
Not affected
Red Hat Enterprise Linux AI (RHEL AI) 3
rhelai3/bootc-gcp-cuda-rhel9
Not affected
Red Hat Enterprise Linux AI (RHEL AI) 3
rhelai3/bootc-rocm-rhel9
Not affected
Red Hat OpenShift AI (RHOAI)
rhoai/odh-codeflare-operator-rhel8
Not affected
Red Hat OpenShift AI (RHOAI)
rhoai/odh-pipeline-runtime-pytorch-rocm-py312-rhel9
Not affected
Red Hat OpenShift AI (RHOAI)
rhoai/odh-training-rocm62-torch24-py311-rhel9
Not affected
Red Hat OpenShift AI (RHOAI)
rhoai/odh-training-rocm62-torch25-py311-rhel9
Not affected
Red Hat OpenShift AI (RHOAI)
rhoai/odh-training-rocm64-torch28-py312-rhel9
Not affected
Red Hat OpenShift AI (RHOAI)
rhoai/odh-training-rocm64-torch29-py312-rhel9
Not affected
Red Hat OpenShift AI (RHOAI)
rhoai/odh-vllm-gaudi-rhel9
Not affected
Red Hat OpenShift AI (RHOAI)
rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat AI Inference Server | rhaiis/vllm-cpu-rhel9 | Not affected | n/a |
| Red Hat AI Inference Server | rhaiis/vllm-cuda-rhel9 | Not affected | n/a |
| Red Hat AI Inference Server | rhaiis/vllm-rocm-rhel9 | Not affected | n/a |
| Red Hat AI Inference Server | rhaiis/vllm-tpu-rhel9 | Not affected | n/a |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | rhelai3/bootc-aws-cuda-rhel9 | Not affected | n/a |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | rhelai3/bootc-azure-cuda-rhel9 | Not affected | n/a |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | rhelai3/bootc-azure-rocm-rhel9 | Not affected | n/a |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | rhelai3/bootc-cuda-rhel9 | Not affected | n/a |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | rhelai3/bootc-gcp-cuda-rhel9 | Not affected | n/a |
| Red Hat Enterprise Linux AI (RHEL AI) 3 | rhelai3/bootc-rocm-rhel9 | Not affected | n/a |
| Red Hat OpenShift AI (RHOAI) | rhoai/odh-codeflare-operator-rhel8 | Not affected | n/a |
| Red Hat OpenShift AI (RHOAI) | rhoai/odh-pipeline-runtime-pytorch-rocm-py312-rhel9 | Not affected | n/a |
| Red Hat OpenShift AI (RHOAI) | rhoai/odh-training-rocm62-torch24-py311-rhel9 | Not affected | n/a |
| Red Hat OpenShift AI (RHOAI) | rhoai/odh-training-rocm62-torch25-py311-rhel9 | Not affected | n/a |
| Red Hat OpenShift AI (RHOAI) | rhoai/odh-training-rocm64-torch28-py312-rhel9 | Not affected | n/a |
| Red Hat OpenShift AI (RHOAI) | rhoai/odh-training-rocm64-torch29-py312-rhel9 | Not affected | n/a |
| Red Hat OpenShift AI (RHOAI) | rhoai/odh-vllm-gaudi-rhel9 | Not affected | n/a |
| Red Hat OpenShift AI (RHOAI) | rhoai/odh-workbench-jupyter-pytorch-rocm-py312-rhel9 | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
1 other source (NVD) ▾
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
2 other sources (Red Hat, CVE.org) ▾
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
1 other source (NVD) ▾
AV:L/AC:L/Au:S/C:P/I:P/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Mar 23, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Mar–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.40% (0.00395) | 31.31th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.24% (0.00239) | 14.76th | v5 (v2026.06.15) |
| Mar 22, 2026 | 0.02% (0.00016) | 3.79th | v4 (v2025.03.14) |
References (9)
- https://access.redhat.com/security/cve/CVE-2026-4538 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2450062 Issue Tracking
- https://github.com/pytorch/pytorch/ product
- https://github.com/pytorch/pytorch/pull/176791 exploitissue-trackingpatchIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2026-4538
- https://vuldb.com/?ctiid.352326 signaturepermissions-requiredPermissions RequiredVDB Entry
- https://vuldb.com/?id.352326 vdb-entryThird Party AdvisoryVDB Entry
- https://vuldb.com/?submit.774681 third-party-advisoryThird Party AdvisoryVDB Entry
- https://www.cve.org/CVERecord?id=CVE-2026-4538
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-4538 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2450062 | Issue Tracking | |
| https://github.com/pytorch/pytorch/ | product | |
| https://github.com/pytorch/pytorch/pull/176791 | exploitissue-trackingpatchIssue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2026-4538 | ||
| https://vuldb.com/?ctiid.352326 | signaturepermissions-requiredPermissions RequiredVDB Entry | |
| https://vuldb.com/?id.352326 | vdb-entryThird Party AdvisoryVDB Entry | |
| https://vuldb.com/?submit.774681 | third-party-advisoryThird Party AdvisoryVDB Entry | |
| https://www.cve.org/CVERecord?id=CVE-2026-4538 |
Change history (0)
No recorded changes yet.