AliRana30 opened a new issue, #49104:
URL: https://github.com/apache/arrow/issues/49104
### Describe the bug, including details regarding any error messages,
version, and platform.
## **Describe the Bug**
`SparseCSFIndex::Equals` causes a segmentation fault when comparing two
`SparseCSFIndex` objects that have a different number of dimensions. The method
iterates through the `indices()` and `indptr()` vectors based on the size of
the current object but does not verify that the `other` object has matching
vector sizes, leading to out-of-bounds access and a crash.
File: `cpp/src/arrow/sparse_tensor.cc`
```cpp
bool SparseCSFIndex::Equals(const SparseCSFIndex& other) const {
for (int64_t i = 0; i < static_cast<int64_t>(indices().size()); ++i) {
if (!indices()[i]->Equals(*other.indices()[i])) return false; // ❌
Segfault if other.indices() is smaller
}
for (int64_t i = 0; i < static_cast<int64_t>(indptr().size()); ++i) {
if (!indptr()[i]->Equals(*other.indptr()[i])) return false; // ❌
Segfault if other.indptr() is smaller
}
return axis_order() == other.axis_order();
}
```
**Component(s)**
C++
### Component(s)
C++
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