CVE-2025-62821
Critical · 9.1CVSS
9.1
EPSS
1.1%
Published
Jun 19, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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