libarchive is a library for manipulating different streaming archive formats, including certain tar variants, several cpio formats, and both BSD and GNU ar variants.
Multiple vulnerabilities have been discovered in libarchive. Please review the referenced CVE identifiers for details.
A remote attacker, via a specially crafted file, could possibly cause a Denial of Service condition.
There is no known workaround at this time.
All libarchive users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=app-arch/libarchive-3.3.0"