There is 1 open security issue in buster.
1 issue left for the package maintainer to handle:
A flaw was found in newlib in versions prior to 4.0.0. Improper overflow validation in the memory allocation functions mEMALIGn, pvALLOc, nano_memalign, nano_valloc, nano_pvalloc could case an integer overflow, leading to an allocation of a small buffer and then to a heap-based buffer overflow.
You can find information about how to handle this issue in the security team's documentation.