{"id":"GHSA-38c5-483c-4qqp","revision":null,"records":[{"revision":"8d8ec8ce33bb416fb017e9da0017c3c2","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-42199","aliases":[],"title":"Grid: Integer Overflow in Grid::expand_rows Leads to Safe-API Undefined Behavior","description":"Grid is a data structure grid for rust. From version 0.17.0 to before version 1.0.1, an integer overflow in Grid::expand_rows() can corrupt the relationship between the grid’s logical dimensions and its backing storage. After the internal invariant is broken, the safe API get() may invoke get_unchecked() with an invalid index, resulting in Undefined Behavior. 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A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-28834","identifiers":["EUVD-2026-28834","CVE-2026-42199"]},"retained":false,"historicalAffected":[]},{"revision":"e59676af3ac141ce9ba54c31cdacd691","observedAt":"2026-10-27T11:12:01.124+00:00","statement":{"source":"nvd","id":"CVE-2026-42199","aliases":[],"title":"Grid is a data structure grid for rust. From version 0.17.0 to before version 1.0.1, an integer overflow in Grid::expand_rows() can corrupt the relationship between the grid’s logical dimensions and its backing storage. After the internal i…","description":"Grid is a data structure grid for rust. From version 0.17.0 to before version 1.0.1, an integer overflow in Grid::expand_rows() can corrupt the relationship between the grid’s logical dimensions and its backing storage. After the internal invariant is broken, the safe API get() may invoke get_unchecked() with an invalid index, resulting in Undefined Behavior. This issue has been patched in version 1.0.1.","state":0,"publishedAt":"2026-05-08T22:16:31.547+00:00","modifiedAt":"2026-10-26T18:10:00.173+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":6.2,"severity":"MEDIUM"}],"references":["https://github.com/becheran/grid/commit/be213bd3528727148bef2d523c89e95d1fd9c072","https://github.com/becheran/grid/releases/tag/v1.0.1","https://github.com/becheran/grid/security/advisories/GHSA-38c5-483c-4qqp"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-42199","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-190"],"productCriteria":[],"sourceDates":{"published":"2026-05-08T22:16:31.547","lastModified":"2026-10-26T18:10:00.173"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-42199","identifiers":["CVE-2026-42199"]},"retained":false,"historicalAffected":[]},{"revision":"4a203636bf86498c839fa58d5d9a6e3f","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"GHSA-38c5-483c-4qqp","aliases":["CVE-2026-42199"],"title":"Grid: Integer Overflow in Grid::expand_rows Leads to Safe-API Undefined Behavior","description":"### Summary\nAn integer overflow in `Grid::expand_rows()` can corrupt the relationship between the grid’s logical dimensions and its backing storage. After the internal invariant is broken, the safe API get() may invoke get_unchecked() with an invalid index, resulting in Undefined Behavior.\n\n### Details\nTested Version: grid = \"1.0.0\"\n\nexpand_rows() computes the new backing length using unchecked arithmetic:\n\n`self.data.len() + rows * self.cols\n`\n\nIf rows * self.cols or the subsequent addition overflows usize, the result wraps in release builds and self.data may be resized to a length much smaller than logically required.\n\nAfter that, if the grid is in ColumnMajor order, the function performs in-place rotation using indices derived from:\n\n```\nlet total_rows = self.rows + row_added;\nlet col_idx = i * total_rows;\nself.data[col_idx..col_idx + total_rows + i].rotate_right(i);\n```\n\nThese computations also rely on the assumption that the backing storage has been resized to the correct length. Once the earlier length computation has wrapped, this assumption no longer holds, so the function may operate on invalid ranges or otherwise enter an inconsistent state.\n\nFinally, the function updates logical metadata with:\n\n`self.rows += rows;\n`\n\nAs a result, the grid can end up with logical dimensions that no longer match the actual backing storage. Subsequent safe API calls such as get() may then rely on corrupted metadata and reach unsafe internal accesses, resulting in invalid unchecked access and Undefined Behavior.\n\n### PoC\n```rust\n#![forbid(unsafe_code)]\n\nuse grid::Grid;\n\nfn main() {\n    let mut g = Grid::from_vec(vec![1u8, 2u8], 2);\n\n    g.expand_rows(usize::MAX / 2);\n\n    g.get(0, 0); // triggers UB in get_unchecked\n}\n```\n\n### Impact\n- Invalid unchecked access (`get_unchecked`) reached via safe API\n- Confirmed by Miri (release-mode):\n\n```\nerror: Undefined Behavior: `assume` called with `false`\n   --> ..../grid-1.0.0/src/lib.rs:527:9\n    |\n527 |         self.data.get_unchecked(index)\n    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Undefined Behavior occurred here\n\n```\n- Potential crash / denial of service in release-builds (e.g., SIGSEGV, Illegal instruction)\n- Violates Rust’s safety guarantees despite using only safe code","state":0,"publishedAt":"2026-04-24T15:57:36+00:00","modifiedAt":"2026-09-10T03:50:42.3789392+00:00","affected":[{"ecosystem":"crates.io","name":"grid","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0.17.0"},{"kind":"fixed","version":"1.0.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/becheran/grid/security/advisories/GHSA-38c5-483c-4qqp","https://nvd.nist.gov/vuln/detail/CVE-2026-42199","https://github.com/becheran/grid/commit/be213bd3528727148bef2d523c89e95d1fd9c072","https://github.com/becheran/grid","https://github.com/becheran/grid/releases/tag/v1.0.1"],"sourceUrl":"https://github.com/advisories/GHSA-38c5-483c-4qqp","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-38c5-483c-4qqp","identifiers":["GHSA-38c5-483c-4qqp","CVE-2026-42199"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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