{"id":"CVE-2026-55093","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-55093","generatedAt":"2026-10-28T00:18:50.251Z","title":"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.","description":"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":"2026-09-14T20:16:47.000Z","lastModified":"2026-09-30T17:51:56.000Z","status":"Deferred","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","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"},"cwe":["CWE-125","CWE-190"],"affected":[],"epss":{"score":0.00181,"percentile":0.07614,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/sonos/tract/commit/34c7df2c9bd2a36583e09b52f3e6319bf23102e8","source":"security-advisories@github.com"},{"url":"https://github.com/sonos/tract/commit/828ec20f74c14c0923c7d7f0cff062ed222d630a","source":"security-advisories@github.com"},{"url":"https://github.com/sonos/tract/commit/ee5f019d39fb97f7d4431b883c3ce97b74c28a64","source":"security-advisories@github.com"},{"url":"https://github.com/sonos/tract/releases/tag/0.21.16","source":"security-advisories@github.com"},{"url":"https://github.com/sonos/tract/releases/tag/0.22.2","source":"security-advisories@github.com"},{"url":"https://github.com/sonos/tract/releases/tag/v0.23.1","source":"security-advisories@github.com"},{"url":"https://github.com/sonos/tract/security/advisories/GHSA-x5mv-8wgw-29hg","source":"security-advisories@github.com"},{"url":"https://github.com/sonos/tract/security/advisories/GHSA-x5mv-8wgw-29hg","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55093","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}