high7.3
CVE-2021-29939
Out of bounds write in stackvector
Impact
StackVec::extend used the lower and upper bounds from an Iterator's size_hint to determine how many items to push into the stack based vector. If the size_hint implementation returned a lower bound that was larger than the upper bound, StackVec would write out of bounds and overwrite memory on the stack. As mentioned by the size_hint documentation, size_hint is mainly for optimization and incorrect implementations should not lead to memory safety issues.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | stackvector | < 1.0.9 | 1.0.9 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Stackvector Project | Stackvector | before 1.0.9 |