tract-nnef: integer overflow in NNEF `.dat` tensor parser yields an out-of-bounds read on model load

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-55093
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-14 20:16:47 UTC
Updated2026-09-14 20:16:47 UTC
DescriptionTract is a tiny, no-nonsense, self-contained TensorFlow and ONNX inference toolkit. Prior to 0.21.16, 0.22.2, and 0.23.1, tract-nnef uses unchecked usize multiplication in nnef/src/tensors.rs read_tensor for attacker-controlled tensor dimensions, the allocation size, and the reported tensor length. Loading a crafted NNEF archive through model_for_path or model_for_read reaches the default DatLoader and can make the wrapped size check accept a small allocation while data/src/tensor.rs as_slice_unchecked creates a much larger logical slice. Model construction through as_uniform can then read beyond the heap allocation and disclose adjacent data, and later access can terminate the process with a segmentation fault. The affected dense numeric tensor path does not include the independently guarded bool, String, or block-quant paths, and no out-of-bounds write or code execution was demonstrated. This issue is fixed in versions 0.21.16, 0.22.2, and 0.23.1.

Risk And Classification

Primary CVSS: v3.1 6.1 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

EPSS: 0.001990000 probability, percentile 0.098500000 (date 2026-09-15)

Problem Types: CWE-125 | CWE-190 | CWE-125 CWE-125: Out-of-bounds Read | CWE-190 CWE-190: Integer Overflow or Wraparound

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
3.1CNADECLARED6.1MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Sonos Tract affected < 0.21.16 Not specified
CNA Sonos Tract affected >= 0.22.0, < 0.22.2 Not specified
CNA Sonos Tract affected >= 0.23.0, < 0.23.1 Not specified

References

ReferenceSourceLinkTags
github.com/sonos/tract/commit/34c7df2c9bd2a36583e09b52f3e6319bf23102e8 [email protected] github.com
github.com/sonos/tract/commit/828ec20f74c14c0923c7d7f0cff062ed222d630a [email protected] github.com
github.com/sonos/tract/releases/tag/0.21.16 [email protected] github.com
github.com/sonos/tract/releases/tag/0.22.2 [email protected] github.com
github.com/sonos/tract/commit/ee5f019d39fb97f7d4431b883c3ce97b74c28a64 [email protected] github.com
github.com/sonos/tract/security/advisories/GHSA-x5mv-8wgw-29hg 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/sonos/tract/releases/tag/v0.23.1 [email protected] github.com
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