PT-2026-50877 · Microsoft · Heif Image Extension

CVE-2025-62821

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Published

2026-06-19

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Updated

2026-06-30

CVSS v3.1

9.1

Critical

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Name of the Vulnerable Software and Affected Versions Microsoft HEIF Image Extensions version 1.2.22.0
Description An out-of-bounds read occurs because the CHEIFItemInfoEntry GetDataSize() function can return a success status while leaving the reported data size at 0. This leads a caller to perform a 1-byte allocation. Subsequently, the CopyPixels() function calculates copy size using the formula stride * abs(roi height) but fails to verify the source buffer length before executing a memmove call.
Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Out of bounds Read

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Weakness Enumeration

Related Identifiers

CVE-2025-62821

Affected Products

Heif Image Extension