What’s Vulnerable › Vulnerabilities

CVE-2023-45679: Attempt to free an uninitialized memory pointer in vorbis_deinit in stb_vorbis

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-10-21 · updated 2026-06-17
• Weakness: CWE-415

Description

stb_vorbis is a single file MIT licensed library for processing ogg vorbis files. A crafted file may trigger memory allocation failure in `start_decoder`. In that case the function returns early, but some of the pointers in `f->comment_list` are left initialized and later `setup_free` is called on these pointers in `vorbis_deinit`. This issue may lead to code execution.

Affected products

• nothings Stb Vorbis.C: 1.22

References

• https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_vorbis.c#L3660-L3677
• https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_vorbis.c#L4208-L4215
• https://securitylab.github.com/advisories/GHSL-2023-145_GHSL-2023-151_stb_image_h/
• https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_vorbis.c#L3660-L3677
• https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_vorbis.c#L4208-L4215
• https://securitylab.github.com/advisories/GHSL-2023-145_GHSL-2023-151_stb_image_h/

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