This happens for me too, on kernel 5.11
/dev/shm memory that is consumed is never released.
No problem when I switch to kernel 5.8
ok: /usr/lib/modules/5.8.0-7642-generic/eset/eea/eset_rtp.ko
bad: /usr/lib/modules/5.11.0-7614-generic/eset/eea/eset_rtp.ko
bad: /usr/lib/modules/5.11.0-7612-generic/eset/eea/eset_rtp.ko