MPFR is a library for multiple-precision floating-point computations with exact rounding.
Multiple buffer overflows have been reported in the mpfr_snprintf() and mpfr_vsnprintf() functions.
A remote user could exploit the vulnerability to cause a Denial of Service in an application using MPFR via unknown vectors.
There is no known workaround at this time.
All MPRF users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/mpfr-2.4.1"