Imagick is a PHP extension to create and modify images using the ImageMagick library.
An out-of-bounds write vulnerability was discovered in the Imagick PHP extension.
A remote attacker, able to upload specially crafted images which will get processed by Imagick, could possibly execute arbitrary code with the privileges of the process or cause a Denial of Service condition.
There is no known workaround at this time.
All Imagick PHP extension users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-php/pecl-imagick-3.4.4"