ubuntu-cve-2026-50142
Vulnerability from osv_ubuntu
Published
2026-07-02 00:00
Modified
2026-09-02 16:18
Summary
Details
libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with the msf1 sequence brand can cause unbounded heap allocation. In libheif/sequences/seq_boxes.cc, Box_stsz::parse() applies max_sequence_frames only to variable-size samples, so fixed-size mode accepts an attacker-controlled sample_count without a bound. In libheif/sequences/track.cc, Track::load() also adds current_sample_idx and samples_per_chunk in 32-bit arithmetic, allowing the consistency check to be bypassed by wraparound. The resulting values reach the Chunk::Chunk() allocation path, which can consume gigabytes of memory and crash or stall the process through memory exhaustion. This issue is fixed in version 1.23.0.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "heif-gdk-pixbuf",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "heif-thumbnailer",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "heif-view",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-examples",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-aomdec",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-aomenc",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-dav1d",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-ffmpegdec",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-j2kdec",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-j2kenc",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-jpegdec",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-jpegenc",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-kvazaar",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-libde265",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-rav1e",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-svtenc",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugin-x265",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif-plugins-all",
"binary_version": "1.20.2-1ubuntu0.6"
},
{
"binary_name": "libheif1",
"binary_version": "1.20.2-1ubuntu0.6"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "libheif",
"purl": "pkg:deb/ubuntu/libheif@1.20.2-1ubuntu0.6?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.20.2-1ubuntu0.6"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.19.7-1",
"1.19.8-1",
"1.20.2-1",
"1.20.2-1ubuntu0.1",
"1.20.2-1ubuntu0.3",
"1.20.2-1ubuntu0.4",
"1.20.2-1ubuntu0.5"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "heif-gdk-pixbuf",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "heif-thumbnailer",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "heif-view",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-examples",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-aomdec",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-aomenc",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-dav1d",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-ffmpegdec",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-j2kdec",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-j2kenc",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-jpegdec",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-jpegenc",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-kvazaar",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-libde265",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-rav1e",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-svtenc",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugin-x265",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif-plugins-all",
"binary_version": "1.21.2-3ubuntu0.3"
},
{
"binary_name": "libheif1",
"binary_version": "1.21.2-3ubuntu0.3"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "libheif",
"purl": "pkg:deb/ubuntu/libheif@1.21.2-3ubuntu0.3?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.21.2-3ubuntu0.3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.20.2-1",
"1.20.2-2",
"1.20.2-2build1",
"1.20.2-2build2",
"1.20.2-2ubuntu1",
"1.21.2-1",
"1.21.2-3",
"1.21.2-3ubuntu0.1",
"1.21.2-3ubuntu0.2"
]
}
],
"aliases": [],
"details": "libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.0, a crafted HEIF sequence accepted by heif_context_read_from_memory() with the msf1 sequence brand can cause unbounded heap allocation. In libheif/sequences/seq_boxes.cc, Box_stsz::parse() applies max_sequence_frames only to variable-size samples, so fixed-size mode accepts an attacker-controlled sample_count without a bound. In libheif/sequences/track.cc, Track::load() also adds current_sample_idx and samples_per_chunk in 32-bit arithmetic, allowing the consistency check to be bypassed by wraparound. The resulting values reach the Chunk::Chunk() allocation path, which can consume gigabytes of memory and crash or stall the process through memory exhaustion. This issue is fixed in version 1.23.0.",
"id": "UBUNTU-CVE-2026-50142",
"modified": "2026-09-02T16:18:22Z",
"published": "2026-07-02T00:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-50142"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-50142"
},
{
"type": "REPORT",
"url": "https://github.com/strukturag/libheif/security/advisories/GHSA-jvmp-j3cw-84mh"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8526-1"
}
],
"related": [
"USN-8526-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-50142"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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