RHSA-2021:3063

In the standard library in Rust before 1.52.0, a double free can occur in the Vec::from_iter function if freeing the element panics.

In the standard library in Rust before 1.52.0, the Zip implementation can report an incorrect size due to an integer overflow.

In the standard library in Rust before 1.52.0, there is an optimization for joining strings that can cause uninitialized bytes to be exposed (or the program to crash) if the borrowed string changes after its length is ch…

In the standard library in Rust before 1.52.0, the Zip implementation calls __iterator_get_unchecked() more than once for the same index (under certain conditions) when next_back() and next() are used together.

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.

In the standard library in Rust before 1.51.0, the Zip implementation calls __iterator_get_unchecked() for the same index more than once when nested.

In the standard library in Rust before 1.52.0, the Zip implementation has a panic safety issue.