libjpeg-turbo is a MMX, SSE, and SSE2 SIMD accelerated JPEG library.
It was discovered that libjpeg-turbo incorrectly handled certain JPEG images.
A remote attacker could entice a user to open a specially crafted JPEG file in an application linked against libjpeg-turbo, possibly resulting in execution of arbitrary code with the privileges of the process or a Denial of Service condition.
There is no known workaround at this time.
All libjpeg-turbo users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/libjpeg-turbo-2.0.3"