[arrow-array] Integer overflow in FixedSizeBinaryArray::value leads to undefined behavior

[ksj1230]

Description

This issue was previously reported privately and is now being disclosed following coordination with maintainers.

FixedSizeBinaryArray::value() performs offset calculations using truncating integer casts, which can lead to overflow and incorrect pointer offsets.

This can result in a potential out-of-bounds read via safe Rust APIs.

Fix

See PR #9850

Reported by Sungjin Kim (@ksj1230)

[alamb]

Thank you (again) @ksj1230 .
As you note this was fixed in this PR

• Prevent FixedSizeBinaryArray i32 offset overflows (try 2) #9872

It will be released as part of 58.3.0 due out later this week

[alamb]

label_issue.py automatically added labels {'arrow'} from #9928