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CVE-2026-47254

libheif Has Heap Buffer Overflow in `Track::get_next_sample_raw_data()` -- OOB Chunk Vector Access

Published: Jul 21, 2026Updated: Jul 27, 2026 Sources: CVE List NVDCWE-125
6.1MEDIUM
NVD MITRE
EPSS Score
0.2%
Top 91.5%
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 1.22.0, `Track::init_sample_timing_table()` in `libheif/sequences/track.cc` stores an out-of-bounds chunk index (`m_chunks.size()`) into `m_presentation_timeline` when the number of chunks defined in the `stco` box is less than the number of samples in `stsz`. A subsequent call to `heif_track_get_next_raw_sequence_sample()` reads `m_chunks[chunk_idx]` with that OOB index, causing a heap-buffer-overflow. Version 1.22.0 fixes 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-125

Affected Products

strukturag
oss-projectaka libde265, strukturag/libde265, libheif
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-wqjg-4x9g-6cvg
github.com

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