CVE-2023-45667

Name: CVE-2023-45667
Creator: NVD / NIST
Published: 2023-10-21T00:15:09.143+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.14%

Last modified Jun 17, 2026

CVE-2023-45667 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. stb_image is a single file MIT licensed library for processing images. If `stbi__load_gif_main` in `stbi_load_gif_from_memory` fails it returns a null pointer and may keep the `z` variable uninitialized. In case the caller also sets the flip vertically flag, it continues and calls `stbi__vertical_flip_slices` with the null pointer result value and the uninitialized `z` value. EPSS estimates a 1.14% chance of exploitation in the next 30 days.

Description

stb_image is a single file MIT licensed library for processing images. If `stbi__load_gif_main` in `stbi_load_gif_from_memory` fails it returns a null pointer and may keep the `z` variable uninitialized. In case the caller also sets the flip vertically flag, it continues and calls `stbi__vertical_flip_slices` with the null pointer result value and the uninitialized `z` value. This may result in a program crash.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.14%

62.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nothings	Stb Image.H	2.28

References

Timeline

Published: Oct 21, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-45667?

How severe is CVE-2023-45667?

CVE-2023-45667 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.14% probability of exploitation in the next 30 days.

How do I fix CVE-2023-45667?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-45667?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST