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TI-2025-38992 Aliases CVE-2025-62821GHSA-4qq3-gjhp-4grf

Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because…

Priority HIGH 78CWE-125Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01052 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:heif_image_extension:1.2.22.0:*:*:*:*:*:*:*1.2.22.0VulnerableMicrosoft
  • cpe:2.3:a:microsoft:heif_image_extension:1.2.22.0:*:*:*:*:*:*:* Versions 1.2.22.0 Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-62821
  2. 2026-10-03 Alias added: GHSA-4qq3-gjhp-4grf

References

Exploit 1

  • TI-2022-08327 HEIF Image Extensions Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
  • TI-2026-56166 HEIF Image Extensions Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
  • TI-2020-13079 HEIF Image Extensions Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences