What’s Vulnerable › Vulnerabilities

CVE-2023-45680: Null pointer dereference in vorbis_deinit in stb_vorbis

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% 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-476

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, the `f->comment_list` is set to `NULL`, but `f->comment_list_length` is not reset. Later in `vorbis_deinit` it tries to dereference the `NULL` pointer. This issue may lead to denial of service.

Affected products

• nothings Stb Vorbis.C: 1.22

References

• https://github.com/nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_vorbis.c#L3660-L3666
• 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-L3666
• 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/

Get alerted when CVE-2023-45680 or the next vulnerability affects your stack