CVE-2026-42199: Grid: Integer Overflow in Grid::expand_rows Leads to Safe-API Undefined Behavior

Severity: medium (CVSS 6.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-08 · updated 2026-10-26
Weakness: CWE-190

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.

Affected products

becheran grid: from 0.17.0, < 1.0.1

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
https://github.com/becheran/grid/security/advisories/GHSA-38c5-483c-4qqp

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