protobuf-c is a protocol buffers implementation in C.
Multiple denial of service vulnerabilities have been discovered in protobuf-c.
Please review the referenced CVE identifiers for details.
There is no known workaround at this time.
All protobuf-c users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-libs/protobuf-c-1.4.1"