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TI-2026-60440 Aliases CVE-2026-89266GHSA-4hj2-h365-qx39

stb_vorbis through 1.22 heap buffer overflow via codebook multiplicands

Priority HIGH 77CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · Low · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0064 50th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nothingsstb_vorbisup to 1.22—No fix listedCNA
  • stb_vorbis Vendornothings Affected up to 1.22 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-89266
  2. 2026-10-03 Alias added: GHSA-4hj2-h365-qx39
  3. 2026-10-23 EPSS moved to the 50th–90th percentile

References

Other 6

  • TI-2023-25531 Integer overflow in stb_vorbis.c CVSS 3.1CRITICAL 9.8
  • TI-2023-24466 Possible double-free or memory leak in stbi__load_gif_main in stb_image CVSS 3.1CRITICAL 9.8
  • TI-2023-24465 Double-free in stbi__load_gif_main_outofmem in stb_image CVSS 3.1HIGH 8.8
  • TI-2023-24463 Multi-byte read heap buffer overflow in stbi__vertical_flip in stb_image CVSS 3.1HIGH 8.1
  • TI-2023-24478 Attempt to free an uninitialized memory pointer in vorbis_deinit in stb_vorbis CVSS 3.1HIGH 7.8
  • TI-2023-24477 Off-by-one heap buffer write in start_decoder in stb_vorbis CVSS 3.1HIGH 7.8
See all 47 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences