{"schema_version":"1.7.3","id":"OSV-2026-53","published":"2026-01-15T00:16:26.117926Z","modified":"2026-01-15T00:16:26.118291Z","summary":"Heap-use-after-free in graph::LigatureSubstFormat1::shrink","details":"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<unsigned int, false> graph::actuate_subtable_split<graph::LigatureSu\n```\n","affected":[{"package":{"name":"harfbuzz","ecosystem":"OSS-Fuzz","purl":"pkg:generic/harfbuzz"},"ranges":[{"type":"GIT","repo":"https://github.com/harfbuzz/harfbuzz.git","events":[{"introduced":"babdb46be3f28b838b66979e5d1a6ca8d80211ec"},{"fixed":"b17fa8ef39b0e8ea3851d43625f366860750e385"}]}],"versions":["12.3.0","12.3.1"],"ecosystem_specific":{"severity":"HIGH"},"database_specific":{"source":"https://github.com/google/oss-fuzz-vulns/blob/main/vulns/harfbuzz/OSV-2026-53.yaml"}}],"references":[{"type":"REPORT","url":"https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=475607265"}]}