CVE-2026-79516 Details
Description
An out-of-bounds read in the stbsp_vsnprintf function (stb_sprintf.h) of nothings stb commit 31c1ad3 allows attackers to cause a Denial of Service (DoS) via sending a crafted input.
A vulnerability has been identified in the stb library by nothings, specifically in the stbsp_vsnprintf function within stb_sprintf.h, in commit 31c1ad3. This vulnerability allows for an out-of-bounds read, which can lead to a heap-buffer-overflow or stack-buffer-overflow, depending on the buffer used. The issue arises when the function is called with a count of zero and a non-null buffer, causing a null terminator to be written out of bounds, just before the allocated buffer. This flaw can be exploited by sending crafted input, leading to a denial-of-service condition.
Users are advised to update to the latest version of the nothings stb library, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 9, 2026CISA-ADP
Assessed Sep 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/nothings/stb/issues/1963 | CISA-ADP | ExploitIssue TrackingTechnical DescriptionVendor |
| https://github.com/nothings/stb/issues/1963 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| nothings stb | 31c1ad3 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 14, 2026 | CVE Modified | CISA-ADP |
| Sep 9, 2026 | New CVE Received | [email protected] |