Vulnerability-Lookup

UBUNTU-CVE-2026-84448 (CVE-2026-84448)

Vulnerability from osv_ubuntu – Published: 2026-09-18 16:17 – Updated: 2026-09-24 21:44 – Source website

Details

libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, the public heif_region_item_add_region_inline_mask_data() function in libheif/api/libheif/heif_regions.cc accepts mask_data_len without verifying that it equals the byte count required by width and height. A later heif_region_get_mask_image() call derives the read length from the region geometry, so an undersized stored buffer causes heif_region_get_inline_mask_image() to read beyond the heap allocation and copy adjacent bytes into the returned monochrome mask image. This can disclose heap data or crash an application that constructs region metadata through the writer API, while the file-parsing path is not affected because it validates the canonical mask size. This issue is fixed in version 1.23.2.

Severity

4.0 (Medium)


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

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-84448	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-84448	REPORT
	https://github.com/strukturag/libheif/security/ad…	REPORT
	https://github.com/strukturag/libheif/commit/646d…	REPORT
	https://github.com/strukturag/libheif/releases/ta…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "heif-gdk-pixbuf",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "heif-thumbnailer",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-examples",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-aomdec",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-aomenc",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-dav1d",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-ffmpegdec",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-j2kdec",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-j2kenc",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-jpegdec",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-jpegenc",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-libde265",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-rav1e",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-svtenc",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif-plugin-x265",
            "binary_version": "1.17.6-1ubuntu4.8"
          },
          {
            "binary_name": "libheif1",
            "binary_version": "1.17.6-1ubuntu4.8"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libheif",
        "purl": "pkg:deb/ubuntu/libheif@1.17.6-1ubuntu4.8?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.16.2-2ubuntu1",
        "1.17.1-1ubuntu2",
        "1.17.1-1ubuntu3",
        "1.17.4-1ubuntu1",
        "1.17.6-1ubuntu1",
        "1.17.6-1ubuntu2",
        "1.17.6-1ubuntu3",
        "1.17.6-1ubuntu4",
        "1.17.6-1ubuntu4.1",
        "1.17.6-1ubuntu4.2",
        "1.17.6-1ubuntu4.3",
        "1.17.6-1ubuntu4.4",
        "1.17.6-1ubuntu4.5",
        "1.17.6-1ubuntu4.6",
        "1.17.6-1ubuntu4.7",
        "1.17.6-1ubuntu4.8"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "heif-gdk-pixbuf",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "heif-thumbnailer",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "heif-view",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-examples",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-aomdec",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-aomenc",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-dav1d",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-ffmpegdec",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-j2kdec",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-j2kenc",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-jpegdec",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-jpegenc",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-kvazaar",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-libde265",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-rav1e",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-svtenc",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugin-x265",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif-plugins-all",
            "binary_version": "1.21.2-3ubuntu0.5"
          },
          {
            "binary_name": "libheif1",
            "binary_version": "1.21.2-3ubuntu0.5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libheif",
        "purl": "pkg:deb/ubuntu/libheif@1.21.2-3ubuntu0.5?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "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",
        "1.21.2-3ubuntu0.3",
        "1.21.2-3ubuntu0.4",
        "1.21.2-3ubuntu0.5"
      ]
    }
  ],
  "aliases": [],
  "details": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, the public heif_region_item_add_region_inline_mask_data() function in libheif/api/libheif/heif_regions.cc accepts mask_data_len without verifying that it equals the byte count required by width and height. A later heif_region_get_mask_image() call derives the read length from the region geometry, so an undersized stored buffer causes heif_region_get_inline_mask_image() to read beyond the heap allocation and copy adjacent bytes into the returned monochrome mask image. This can disclose heap data or crash an application that constructs region metadata through the writer API, while the file-parsing path is not affected because it validates the canonical mask size. This issue is fixed in version 1.23.2.",
  "id": "UBUNTU-CVE-2026-84448",
  "modified": "2026-09-24T21:44:15Z",
  "published": "2026-09-18T16:17:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-84448"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-84448"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-p58j-h3vm-3fp5"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/strukturag/libheif/commit/646d85fbf5bd18fc3cdc516e915e59072de2d510"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.2"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-84448"
  ]
}

CVE-2026-84448 (GCVE-0-2026-84448)

Vulnerability from cvelistv5 – Published: 2026-09-18 15:53 – Updated: 2026-09-24 20:58

Title

libheif: Heap out-of-bounds read in libheif inline-mask region API (heif_region_item_add_region_inline_mask_data / heif_region_get_mask_image)

Summary

Severity

4 (Medium)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-24 20:58 UTC

CWE

CWE-125 - Out-of-bounds Read
CWE-131 - Incorrect Calculation of Buffer Size

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/646d…	x_refsource_MISC
https://github.com/strukturag/libheif/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
strukturag	libheif	Affected: < 1.23.2

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-84448",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-24T20:58:16.283291Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-24T20:58:18.659Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-p58j-h3vm-3fp5"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "libheif",
          "vendor": "strukturag",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.23.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, the public heif_region_item_add_region_inline_mask_data() function in libheif/api/libheif/heif_regions.cc accepts mask_data_len without verifying that it equals the byte count required by width and height. A later heif_region_get_mask_image() call derives the read length from the region geometry, so an undersized stored buffer causes heif_region_get_inline_mask_image() to read beyond the heap allocation and copy adjacent bytes into the returned monochrome mask image. This can disclose heap data or crash an application that constructs region metadata through the writer API, while the file-parsing path is not affected because it validates the canonical mask size. This issue is fixed in version 1.23.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-125",
              "description": "CWE-125: Out-of-bounds Read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-131",
              "description": "CWE-131: Incorrect Calculation of Buffer Size",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T15:53:42.499Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/strukturag/libheif/security/advisories/GHSA-p58j-h3vm-3fp5",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-p58j-h3vm-3fp5"
        },
        {
          "name": "https://github.com/strukturag/libheif/commit/646d85fbf5bd18fc3cdc516e915e59072de2d510",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/strukturag/libheif/commit/646d85fbf5bd18fc3cdc516e915e59072de2d510"
        },
        {
          "name": "https://github.com/strukturag/libheif/releases/tag/v1.23.2",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/strukturag/libheif/releases/tag/v1.23.2"
        }
      ],
      "source": {
        "advisory": "GHSA-p58j-h3vm-3fp5",
        "discovery": "UNKNOWN"
      },
      "title": "libheif: Heap out-of-bounds read in libheif inline-mask region API (heif_region_item_add_region_inline_mask_data / heif_region_get_mask_image)"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-84448",
    "datePublished": "2026-09-18T15:53:42.499Z",
    "dateReserved": "2026-09-01T20:05:09.423Z",
    "dateUpdated": "2026-09-24T20:58:18.659Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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Action not permitted

UBUNTU-CVE-2026-84448 (CVE-2026-84448)

CVE-2026-84448 (GCVE-0-2026-84448)

Tags

Sightings

Nomenclature

Related by attack behaviour