CVE-2026-55093 — tract-nnef: integer overflow in NNEF `.dat` tensor parser yields an out-of-bounds read on model load

Description (CNA)

Tract 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.

Affected (CNA)

Vendor / product	Versions
sonos / tract	affected < 0.21.16; affected >= 0.22.0, < 0.22.2; affected >= 0.23.0, < 0.23.1

CWE

CWE-125, CWE-190

References

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/sonos/tract/security/advisories/GHSA-x5mv-8wgw-29hg