{"id":"CVE-2026-55093","aliases":["GHSA-x5mv-8wgw-29hg","RUSTSEC-2026-0217"],"url":"https://o3.security/vulnerability/CVE-2026-55093","summary":"tract-nnef: integer overflow in NNEF `.dat` tensor parser yields an out-of-bounds read on model load","details":"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.","published":"2026-09-14T19:47:46.877Z","modified":"2026-09-15T11:45:40.792470403Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"crates.io","name":"tract-nnef","fixedVersion":"0.23.1"},{"ecosystem":"crates.io","name":"tract-nnef","fixedVersion":"0.22.2"},{"ecosystem":"crates.io","name":"tract-nnef","fixedVersion":"0.21.16"}],"fix":{"url":"https://github.com/sonos/tract/commit/34c7df2c9bd2a36583e09b52f3e6319bf23102e8","label":"sonos/tract@34c7df2"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55093.json"},{"type":"FIX","url":"https://github.com/sonos/tract/commit/34c7df2c9bd2a36583e09b52f3e6319bf23102e8"},{"type":"FIX","url":"https://github.com/sonos/tract/commit/828ec20f74c14c0923c7d7f0cff062ed222d630a"},{"type":"FIX","url":"https://github.com/sonos/tract/commit/ee5f019d39fb97f7d4431b883c3ce97b74c28a64"},{"type":"WEB","url":"https://github.com/sonos/tract/releases/tag/0.21.16"},{"type":"WEB","url":"https://github.com/sonos/tract/releases/tag/0.22.2"},{"type":"WEB","url":"https://github.com/sonos/tract/releases/tag/v0.23.1"},{"type":"ADVISORY","url":"https://github.com/sonos/tract/security/advisories/GHSA-x5mv-8wgw-29hg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55093"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-15T11:45:40.792470403Z"}}