hb-ot-layout-gsubgpos.hh in HarfBuzz through 6.0.0 allows attackers to trigger O(n^2) growth via consecutive marks during the process of looking back for base glyphs when attaching marks.
{
"cpes": [
"cpe:2.3:a:bellsoft:libericajre:*:*:*:*:*:*:*:*"
],
"severity": "High"
}