Vulnerability-Lookup

CVE-2026-50142 (GCVE-0-2026-50142)

Vulnerability from cvelistv5 – Published: 2026-08-18 21:18 – Updated: 2026-08-19 18:51

Title

libheif: unbounded heap allocation in HEIF sequence parser (stsz fixed-size mode missing bound check)

Summary

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)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-19 18:51 UTC

CWE

CWE-190 - Integer Overflow or Wraparound
CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M mitre root

References

3 references

URL	Tags
https://github.com/strukturag/libheif/security/ad…	x_refsource_CONFIRM
https://github.com/strukturag/libheif/commit/a6ca…	x_refsource_MISC
https://github.com/strukturag/libheif/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
strukturag	libheif	Affected: >= 1.19.0, < 1.23.0	guessed

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-50142",
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FKIE_CVE-2026-50142

Vulnerability from fkie_nvd - Published: 2026-08-18 22:16 - Updated: 2026-09-09 21:13

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/strukturag/libheif/commit/a6caa38f7a70d66dc9caec2a7bfe20935b32c622
	security-advisories@github.com	https://github.com/strukturag/libheif/releases/tag/v1.23.0
	security-advisories@github.com	https://github.com/strukturag/libheif/security/advisories/GHSA-jvmp-j3cw-84mh

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "libheif",
          "vendor": "strukturag",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.19.0, \u003c 1.23.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-50142",
  "lastModified": "2026-09-09T21:13:25.910",
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      {
        "cvssData": {
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SUSE-SU-2026:22153-1

Vulnerability from csaf_suse - Published: 2026-06-17 08:36 - Updated: 2026-06-17 08:36

Summary

Security update for libheif

Severity

Important

Scope

20 vulnerabilities in this advisory, including CVE-2026-50142.

CVE-2026-50142

6.2 (Medium)


                
                  CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Recommended: 68 products

Open the full advisory

ubuntu-cve-2026-50142

Vulnerability from osv_ubuntu

Published

2026-07-02 00:00

Modified

2026-09-02 16:18

Summary

Details

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-50142	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-50142	REPORT
	https://github.com/strukturag/libheif/security/ad…	REPORT
	https://ubuntu.com/security/notices/USN-8526-1	ADVISORY

JSON

To clipboard

{
  "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"
  ]
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2026-50142 (GCVE-0-2026-50142)

FKIE_CVE-2026-50142

SUSE-SU-2026:22153-1

ubuntu-cve-2026-50142

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature