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CVE-2026-47709

libheif has a NULL pointer dereference in heif_image_handle_get_image_tiling for malformed unci image missing ispe

Published: Jul 21, 2026Updated: Jul 27, 2026 Sources: CVE List NVDCWE-476
5.5MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 88.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C API `heif_image_handle_get_image_tiling()` when a malformed uncompressed HEIF image item has an associated `uncC` property but no associated `ispe` property. In debug builds this trips the `ispe && uncC` assertion in `ImageItem_uncompressed::get_heif_image_tiling()`. In a release/NDEBUG ASan build, the same file causes a null pointer read at address `0xa8`. Version 1.22.0 fixes the issue.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:NI:NA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-476

Affected Products

struktur
oss-projectaka libde265, libheif, libde265 libheif
libheifLibraryLibrary
OSS Libraries / generic-library
strukturag
oss-projectaka libheif, strukturag/libde265, libde265
libheifLibrary
OSS Libraries / generic-library

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Impact
Initial Access
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References

https://github.com/strukturag/libheif/issues/1802
github.com
https://github.com/strukturag/libheif/pull/1806
github.com
https://github.com/strukturag/libheif/security/advisories/GHSA-4h72-vqgp-9376
github.com

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