CVE-2026-55093tract-nnef: integer overflow in NNEF `.dat` tensor parser yields an out-of-bounds read on model load
- 6.1MediumCVSS base score
- 0.18%Exploitation in 30 daysEPSS · top 92% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- YesPublic exploitsa reference or SSVC says so
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.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. A reference of the record is tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits1
References tagged exploit1 reference
- https://github.com/sonos/tract/security/advisories/GHSA-x5mv-8wgw-29hg (opens in a new tab)x_refsource_CONFIRMexploit
Timeline
ID reserved
By GitHub_M
- 3 months later
· 3 months later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium6.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H |
| NVDNVD · Deferred | 3.1 | Medium6.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.18% · top 92% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
Affected products
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- crates.iotract-nnefGHSA-x5mv-8wgw-29hg (opens in a new tab)
References
References7
- https://github.com/sonos/tract/security/advisories/GHSA-x5mv-8wgw-29hg (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/sonos/tract/commit/34c7df2c9bd2a36583e09b52f3e6319bf23102e8 (opens in a new tab)x_refsource_MISC
- https://github.com/sonos/tract/commit/828ec20f74c14c0923c7d7f0cff062ed222d630a (opens in a new tab)x_refsource_MISC
- https://github.com/sonos/tract/commit/ee5f019d39fb97f7d4431b883c3ce97b74c28a64 (opens in a new tab)x_refsource_MISC
- https://github.com/sonos/tract/releases/tag/0.21.16 (opens in a new tab)x_refsource_MISC
- https://github.com/sonos/tract/releases/tag/0.22.2 (opens in a new tab)x_refsource_MISC
- https://github.com/sonos/tract/releases/tag/v0.23.1 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-77792 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-x5mv-8wgw-29hg (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-55093)Record last updated .