PT-2025-34572 · Crates.Io · Id-Map
Published
2025-08-14
·
Updated
2025-08-14
None
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Due to a flaw in the constructor
id map::IdMap::from iter, ill-formed objects may be created in which the amount of actually initialized memory is less than what is expected by the fields of IdMap. Specifically, the field ids is initialized based on the capacity of the vector values, which is constructed from the provided iterator. However, the length of this vector may be smaller than its capacity.In such cases, when the resulting
IdMap is dropped, its destructor incorrectly assumes that values contains ids.len() == values.capacity() initialized elements and attempts to iterate over and drop them. This leads to dereferencing and attempting to free uninitialized memory, resulting in undefined behavior and potential segmentation faults.The bug was fixed in commit
fab6922, and all unsafe code was removed from the crate.Note that the maintainer recommends using the following alternatives:
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Related Identifiers
Affected Products
Id-Map