```toml
[advisory]
id = "CVE-2021-28875"
package = "std"
categories = ["memory-corruption"]
date = "2021-01-10"
url = "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-28875"

[versions]
patched = [">= 1.50.0"]
unaffected = ["< 1.20.0"]
```

# Logic bug in Read can cause buffer overflow in read_to_end()

In the standard library in Rust before 1.50.0, read_to_end() does not validate the return value from Read in an unsafe context. This bug could lead to a buffer overflow.