An issue was discovered in Poppler 0.71.0. There is a memory leak in GfxColorSpace::setDisplayProfile in GfxState.cc, as demonstrated by pdftocairo.
https://usn.ubuntu.com/4042-1/
https://lists.debian.org/debian-lts-announce/2022/09/msg00030.html
https://gitlab.freedesktop.org/poppler/poppler/issues/654