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.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/hyunjungg/CVE-2025-62821	Exploit Third Party Advisory
https://github.com/hyunjungg/CVE-2025-62821	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

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

History

05 Oct 2026, 18:10

Type	Values Removed	Values Added
Summary		(es) Microsoft HEIF Image Extensions 1.2.22.0 tiene una lectura fuera de límites porque CHEIFItemInfoEntry_GetDataSize puede devolver éxito mientras deja el tamaño de datos reportado como 0. Esto provoca que un llamador realice una asignación de 1 byte. Más tarde, CopyPixels calcula copy_size = stride * abs(roi_height) pero no comprueba la longitud del búfer de origen antes de una llamada a memmove.

Information

Published : 2026-06-19 14:16

Updated : 2026-10-12 22:10

NVD link : CVE-2025-62821

Mitre link : CVE-2025-62821

CVE.ORG link : CVE-2025-62821

JSON object : View

Products Affected

microsoft

heif_image_extension

CWE

CWE-125

Out-of-bounds Read

{"id": "CVE-2025-62821", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-62821", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-22T15:43:03.426825Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.1, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cve@mitre.org", "affectedData": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}]}], "published": "2026-06-19T14:16:21.570", "references": [{"url": "https://github.com/hyunjungg/CVE-2025-62821", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://github.com/hyunjungg/CVE-2025-62821", "tags": ["Exploit", "Third Party Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-125"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Microsoft HEIF Image Extensions 1.2.22.0 tiene una lectura fuera de l\u00edmites porque CHEIFItemInfoEntry_GetDataSize puede devolver \u00e9xito mientras deja el tama\u00f1o de datos reportado como 0. Esto provoca que un llamador realice una asignaci\u00f3n de 1 byte. M\u00e1s tarde, CopyPixels calcula copy_size = stride * abs(roi_height) pero no comprueba la longitud del b\u00fafer de origen antes de una llamada a memmove."}], "lastModified": "2026-10-12T22:10:00.247", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:heif_image_extension:1.2.22.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "85242309-6F89-43F2-BFEA-16747B40E755"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}