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https://issues.apache.org/jira/browse/ARROW-9948?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou reassigned ARROW-9948:
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Assignee: Antoine Pitrou (was: Andrew Wieteska)
> [C++] Decimal128 does not check scale range when rescaling; can cause buffer
> overflow
> -------------------------------------------------------------------------------------
>
> Key: ARROW-9948
> URL: https://issues.apache.org/jira/browse/ARROW-9948
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Reporter: Mingyu Zhong
> Assignee: Antoine Pitrou
> Priority: Major
> Labels: pull-request-available
> Fix For: 6.0.0
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> BasicDecimal128::GetScaleMultiplier has a DCHECK on the scale, but the scale
> can come from users. For example, Decimal128::FromString("1e100") will cause
> an out-of-bound read.
> BasicDecimal128::Rescale and BasicDecimal128::GetWholeAndFraction have the
> same problem.
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