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CVE-2023-45666

27
FAUCET Score

CVE-2023-45666 is a critical memory leak and potential double-free vulnerability affecting the stb_image.h library, specifically within its GIF image processing function. An attacker could exploit this by providing a malformed GIF, leading to resource exhaustion or application instability. With a CVSS score of 9.8, this vulnerability is easily exploitable over a network with no user interaction, potentially resulting in high impact to confidentiality, integrity, and availability. Currently, there is no public exploit code available, nor is there evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
2.28CPE matchmatch criteria
cpe:2.3:a:nothings:stb_image.h:2.28:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.3HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.96%
Probability of exploitation in next 30 days
EPSS Percentile
57.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0096 is in the 43rd percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_image.h
Third Party Advisory
github.com / nothings/stb/blob/5736b15f7ea0ffb08dd38af21067c314d6a3aae9/stb_image.h
Third Party Advisory
lists.fedoraproject.org / archives/list/[email protected]/message/NMXKOKPP4BKTNUTF5KSRDQAWOUILQZNO
lists.fedoraproject.org / archives/list/[email protected]/message/QVABVF4GEM6BYD5L4L64RCRSXUHY6LGN
lists.fedoraproject.org / archives/list/[email protected]/message/UVQ7ONFH5GWLMXYEAJG32A3EUKUCEVCR
securitylab.github.com / advisories/GHSL-2023-145_GHSL-2023-151_stb_image_h
Third Party Advisory