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CVE-2026-47178

libheif has Heap Out Of Bounds Write in unci subsystem

Published: Jul 21, 2026Updated: Jul 27, 2026 Sources: CVE List NVDCWE-787
6.1MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 90.3%
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. In versions 1.19.0 through 1.21.2, a crafted HEIF file (uncompressed `unci` codec, tiled, component-interleaved, 4:2:0) triggers a heap out-of-bounds write in libheif's uncompressed tile decoder. The write overwrites the C++ vtable pointer of an adjacent `unc_decoder_component_interleave` object; the next virtual call dispatches to an attacker-chosen address. Version 1.22.0 patches the issue.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:LI: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:LConfidentiality
Low
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-787

Affected Products

strukturag
oss-projectaka libheif, libde265, strukturag/libde265
libheifLibrary
OSS Libraries / generic-library
struktur
oss-projectaka libheif, libde265 libheif, libde265
libheifLibraryLibrary
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
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://github.com/strukturag/libheif/security/advisories/GHSA-5x55-x5pf-9c6g
github.com

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