Excerpt from upstream release notes:
This release also contains the security fixes for XSA-137, XSA-138, XSA-141 to XSA-153.
XSA-139 and XSA-140 only apply to QEMU Upstream and are fixed from versions 2.3.1 and 2.4.0 of QEMU.
The qemu portion of XSA-135 has also been applied to qemu-traditional.