Vulnerability-Lookup

ubuntu-cve-2026-89266

Vulnerability from osv_ubuntu

Published

2026-09-14 00:00

Modified

2026-09-14 00:00

Summary

Details

stb_vorbis through 1.22 contains a heap buffer overflow in start_decoder() where the codebook multiplicands allocation size is truncated from size_t to int. Attackers can craft a malicious Ogg Vorbis file with large entries and dimensions values to trigger out-of-bounds writes, causing process crashes or heap corruption.

Severity

8.2 (High)


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

8.8 (High)


                    
                      CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-89266	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-89266	REPORT
	https://github.com/nothings/stb/issues/1928	REPORT
	https://github.com/nothings/stb/issues/1933	REPORT
	https://github.com/nothings/stb/issues/1947	REPORT
	https://github.com/nothings/stb	REPORT
	https://github.com/nothings/stb/blob/2c980bb59875…	REPORT
	https://github.com/nothings/stb/blob/2c980bb59875…	REPORT
	https://www.vulncheck.com/advisories/stb-vorbis-t…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libstb0",
            "binary_version": "0.0~git20190817.1.052dce1-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "libstb",
        "purl": "pkg:deb/ubuntu/libstb@0.0~git20190817.1.052dce1-1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0~git20190817.1.052dce1-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libstb0",
            "binary_version": "0.0~git20210910.af1a5bc+ds-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "libstb",
        "purl": "pkg:deb/ubuntu/libstb@0.0~git20210910.af1a5bc+ds-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0~git20200713.b42009b+ds-1",
        "0.0~git20210910.af1a5bc+ds-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libstb0t64",
            "binary_version": "0.0~git20230129.5736b15+ds-1.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "libstb",
        "purl": "pkg:deb/ubuntu/libstb@0.0~git20230129.5736b15+ds-1.2?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0~git20230129.5736b15+ds-1",
        "0.0~git20230129.5736b15+ds-1.1",
        "0.0~git20230129.5736b15+ds-1.2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "libstb0t64",
            "binary_version": "0.0~git20250907.fede005+ds-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "libstb",
        "purl": "pkg:deb/ubuntu/libstb@0.0~git20250907.fede005+ds-1?arch=source\u0026distro=resolute"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.0~git20241109.5c20573+ds-1",
        "0.0~git20250907.fede005+ds-1"
      ]
    }
  ],
  "aliases": [],
  "details": "stb_vorbis through 1.22 contains a heap buffer overflow in start_decoder() where the codebook multiplicands allocation size is truncated from size_t to int. Attackers can craft a malicious Ogg Vorbis file with large entries and dimensions values to trigger out-of-bounds writes, causing process crashes or heap corruption.",
  "id": "UBUNTU-CVE-2026-89266",
  "modified": "2026-09-14T00:00:00Z",
  "published": "2026-09-14T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-89266"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-89266"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nothings/stb/issues/1928"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nothings/stb/issues/1933"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nothings/stb/issues/1947"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nothings/stb"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nothings/stb/blob/2c980bb59875b0d32144a71867fbdebb2f77cd20/stb_vorbis.c#L3878-L3880"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/nothings/stb/blob/2c980bb59875b0d32144a71867fbdebb2f77cd20/stb_vorbis.c#L950"
    },
    {
      "type": "REPORT",
      "url": "https://www.vulncheck.com/advisories/stb-vorbis-through-1.22-heap-buffer-overflow-via-codebook-multiplicands"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-89266"
  ]
}

CVE-2026-89266 (GCVE-0-2026-89266)

Vulnerability from cvelistv5 – Published: 2026-09-11 23:23 – Updated: 2026-09-11 23:23

Title

stb_vorbis through 1.22 heap buffer overflow via codebook multiplicands

Summary

Severity

8.8 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

8.2 (High)


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

CWE

CWE-787 - Out-of-bounds Write

Assigner

VulnCheck mitre root

References

7 references

URL	Tags
https://github.com/nothings/stb/issues/1928	issue-tracking
https://github.com/nothings/stb/issues/1933	issue-tracking
https://github.com/nothings/stb/issues/1947	issue-tracking
https://github.com/nothings/stb/blob/2c980bb59875…	technical-description
https://github.com/nothings/stb/blob/2c980bb59875…	technical-description
https://github.com/nothings/stb	product
https://www.vulncheck.com/advisories/stb-vorbis-t…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
nothings	stb_vorbis	Affected: 0 , ≤ 1.22 (custom) cpe:2.3:a:stb_vorbis_project:stb_vorbis::::::::

Date Public

2026-04-03 00:00

Credits

boergeson Përparim Mjeku

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/nothings/stb",
          "product": "stb_vorbis",
          "repo": "https://github.com/nothings/stb",
          "vendor": "nothings",
          "versions": [
            {
              "lessThanOrEqual": "1.22",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:stb_vorbis_project:stb_vorbis:*:*:*:*:*:*:*:*",
                  "versionEndIncluding": "1.22",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "boergeson"
        },
        {
          "lang": "en",
          "type": "reporter",
          "value": "P\u00ebrparim Mjeku"
        }
      ],
      "datePublic": "2026-04-03T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "stb_vorbis through 1.22 contains a heap buffer overflow in start_decoder() where the codebook multiplicands allocation size is truncated from size_t to int. Attackers can craft a malicious Ogg Vorbis file with large entries and dimensions values to trigger out-of-bounds writes, causing process crashes or heap corruption."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-787",
              "description": "Out-of-bounds Write",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-11T23:23:26.509Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Issue #1928",
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/nothings/stb/issues/1928"
        },
        {
          "name": "GitHub Issue #1933",
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/nothings/stb/issues/1933"
        },
        {
          "name": "GitHub Issue #1947",
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/nothings/stb/issues/1947"
        },
        {
          "name": "Vulnerable multiplicands allocation (stb_vorbis.c:3878-3880)",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/nothings/stb/blob/2c980bb59875b0d32144a71867fbdebb2f77cd20/stb_vorbis.c#L3878-L3880"
        },
        {
          "name": "setup_malloc int size parameter (stb_vorbis.c:950)",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/nothings/stb/blob/2c980bb59875b0d32144a71867fbdebb2f77cd20/stb_vorbis.c#L950"
        },
        {
          "tags": [
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          "url": "https://github.com/nothings/stb"
        },
        {
          "name": "VulnCheck Advisory: stb_vorbis through 1.22 heap buffer overflow via codebook multiplicands",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/stb-vorbis-through-1.22-heap-buffer-overflow-via-codebook-multiplicands"
        }
      ],
      "title": "stb_vorbis through 1.22 heap buffer overflow via codebook multiplicands",
      "x_generator": {
        "engine": "vulncheck-endgame"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-89266",
    "datePublished": "2026-09-11T23:23:26.509Z",
    "dateReserved": "2026-09-11T10:52:56.669Z",
    "dateUpdated": "2026-09-11T23:23:26.509Z",
    "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.

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.