Vulnerability Details CVE-2025-62821
Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because CHEIFItemInfoEntry_GetDataSize can return success while leaving the reported data size as 0. This causes a caller to make a 1-byte allocation. Later, CopyPixels computes copy_size = stride * abs(roi_height) but does not check the source buffer length before a memmove call.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 35.5%
CVSS Severity
CVSS v3 Score 9.1
Products affected by CVE-2025-62821
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cpe:2.3:a:microsoft:heif_image_extension:1.2.22.0