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The tt_cmap4_validate function in sfnt/ttcmap.c in FreeType before 2.5.4 validates a certain length field before that field's value is completely calculated, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via a crafted cmap SFNT table.
Use CWE-119, Freetype vendor hub and Freetype product page to widen CVE-2014-9663 into its surrounding weakness, vendor, and product context.
Compare it with CVE-2020-15999, CVE-2025-27363 and CVE-2022-27404 for nearby disclosures in the same product family.