CVE-2025-62821: n/a
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.
AI Analysis
Technical Summary
The vulnerability in Microsoft HEIF Image Extensions 1.2.22.0 arises because CHEIFItemInfoEntry_GetDataSize can indicate success but report a zero data size, causing the caller to allocate only one byte. Later, CopyPixels computes the amount of data to copy based on stride and region of interest height without validating the source buffer length, resulting in a potential out-of-bounds read during a memmove operation.
Potential Impact
This vulnerability can lead to an out-of-bounds read in the HEIF image processing component, which may cause application crashes or potentially expose sensitive memory contents. No confirmed exploits are known in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted HEIF images with the affected extension version.
CVE-2025-62821: n/a
Description
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Microsoft HEIF Image Extensions 1.2.22.0 arises because CHEIFItemInfoEntry_GetDataSize can indicate success but report a zero data size, causing the caller to allocate only one byte. Later, CopyPixels computes the amount of data to copy based on stride and region of interest height without validating the source buffer length, resulting in a potential out-of-bounds read during a memmove operation.
Potential Impact
This vulnerability can lead to an out-of-bounds read in the HEIF image processing component, which may cause application crashes or potentially expose sensitive memory contents. No confirmed exploits are known in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted HEIF images with the affected extension version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2025-10-23T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a354cbff198dc38c1587381
Added to database: 6/19/2026, 2:05:51 PM
Last enriched: 6/19/2026, 2:21:54 PM
Last updated: 6/19/2026, 9:43:33 PM
Views: 4
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