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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact Low

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
nothings stb_vorbis unaffected
Version Status Constraints
0 affected ≤ 1.22

No data.

No data.

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Project Subscriptions

Vendors Products
Stb Vorbis Project Subscribe
Stb Vorbis Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/nothings/stb cve-icon cve-icon
https://github.com/nothings/stb/blob/2c980bb59875b0d32144a71867fbdebb2f77cd20/stb_vorbis.c#L3878-L3880 cve-icon cve-icon
https://github.com/nothings/stb/blob/2c980bb59875b0d32144a71867fbdebb2f77cd20/stb_vorbis.c#L950 cve-icon cve-icon
https://github.com/nothings/stb/issues/1928 cve-icon cve-icon
https://github.com/nothings/stb/issues/1933 cve-icon cve-icon
https://github.com/nothings/stb/issues/1947 cve-icon cve-icon
https://www.vulncheck.com/advisories/stb-vorbis-through-1.22-heap-buffer-overflow-via-codebook-multiplicands cve-icon cve-icon
History

Fri, 11 Sep 2026 23:45:00 +0000

Type Values Removed Values Added
Description 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.
Title stb_vorbis through 1.22 heap buffer overflow via codebook multiplicands
First Time appeared Stb Vorbis Project
Stb Vorbis Project stb Vorbis
Weaknesses CWE-787
CPEs cpe:2.3:a:stb_vorbis_project:stb_vorbis:*:*:*:*:*:*:*:*
Vendors & Products Stb Vorbis Project
Stb Vorbis Project stb Vorbis
References
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H'}

cvssV4_0

{'score': 8.8, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-11T23:23:26.509Z

Reserved: 2026-09-11T10:52:56.669Z

Link: CVE-2026-89266

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-12T00:17:06.440

Modified: 2026-09-12T00:17:06.440

Link: CVE-2026-89266

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-12T01:30:06Z

Weaknesses