Answer in brief
CVE-2026-89266 records a High severity (CVSS 8.8) vulnerability in stb_vorbis through 1.22 heap buffer overflow via codebook multiplicands. The current sources do not mark it as known exploited. The current feed maps nothings/stb_vorbis (generic), nothings/stb_vorbis (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps nothings/stb_vorbis (generic), nothings/stb_vorbis (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| nothings/stb_vorbisgeneric | 0 | Not reported |
| nothings/stb_vorbisgeneric | >=0 <=1.22 | Not reported |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.