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CVE-2025-62821

9.1 critical exploit SSVC exploitation: poc Analyzed
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Public exploits 1

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

Change history 1

  1. First seenCVSS 9.1 · microsoftNVD modified 2026-10-12 22:10

Affected (CPE criteria) 1

  • cpe:2.3:a:microsoft:heif_image_extension:1.2.22.0:*:*:*:*:*:*:*

References 2