{"id":"OSV-2026-53","aliases":[],"status":"published","title":"Heap-use-after-free in graph::LigatureSubstFormat1::shrink","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=475607265\n\n```\nCrash type: Heap-use-after-free READ 8\nCrash state:\ngraph::LigatureSubstFormat1::shrink\ngraph::LigatureSubstFormat1::split_context_t::shrink\nhb_vector_t\u003cunsigned int, false\u003e graph::actuate_subtable_split\u003cgraph::LigatureSu\n```","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2026-01-15T00:16:26.117926Z","modified":"2026-01-15T00:16:26Z","affected":[{"source":"osv","ecosystem":"OSS-Fuzz","package":"harfbuzz","ranges":[{"type":"GIT","events":[{"introduced":"babdb46be3f28b838b66979e5d1a6ca8d80211ec"},{"fixed":"b17fa8ef39b0e8ea3851d43625f366860750e385"}]}],"versions":["12.3.0","12.3.1"]}],"references":[{"url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=475607265","tags":["report"]}],"sources":{"osv":[{"id":"OSV-2026-53","title":"Heap-use-after-free in graph::LigatureSubstFormat1::shrink","description":"OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=475607265\n\n```\nCrash type: Heap-use-after-free READ 8\nCrash state:\ngraph::LigatureSubstFormat1::shrink\ngraph::LigatureSubstFormat1::split_context_t::shrink\nhb_vector_t\u003cunsigned int, false\u003e graph::actuate_subtable_split\u003cgraph::LigatureSu\n```\n","status":"published","published":"2026-01-15T00:16:26.117926Z","modified":"2026-01-15T00:16:26.118291Z","updated_at":"2026-11-02T15:52:50.263679Z"}]}}