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CVE-2026-49271

libheif: Wrapped icef compressed-unit range check causes out-of-bounds read in uncompressed HEIF decoder

Published: Jun 19, 2026Updated: Jun 26, 2026 Sources: CVE List NVDCWE-125
6.5MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 90.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
OpenVAS

Description

libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.1, the uncompressed HEIF decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators outside the compressed item buffer, producing an out-of-bounds heap read and crash. Version 1.22.1 patches the issue.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
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-125

Affected Products

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

Exploitability

Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vf
github.com

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