re2c is a tool for generating C-based recognizers from regular expressions.
A heap buffer overflow vulnerability was discovered in re2c.
An attacker could possibly cause a Denial of Service condition.
There is no known workaround at this time.
All re2c users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-util/re2c-1.3-r1"