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PatchSiren cyber security CVE debrief

CVE-2025-3408 Nothings CVE debrief

A critical integer overflow vulnerability exists in the stb_dupreplace function of Nothings stb image library, affecting versions up to commit f056911. The vulnerability can be triggered remotely through manipulation of the affected function, potentially leading to memory corruption or other undefined behavior. The stb library uses continuous delivery with rolling releases, meaning no traditional version numbers are available for affected or patched releases. The vendor was contacted prior to disclosure but did not respond. Organizations using stb image.h should monitor the official repository for security updates and consider implementing input validation as a defensive measure.

Vendor
Nothings
Product
stb
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2025-04-08
Original CVE updated
2026-05-19
Advisory published
2025-04-08
Advisory updated
2026-05-19

Who should care

Organizations using stb image.h for image processing, particularly those handling untrusted image data from remote sources. Developers maintaining applications with stb dependencies should prioritize monitoring given the vendor's non-response to disclosure.

Technical summary

The stb_dupreplace function in Nothings stb image library contains an integer overflow vulnerability that can be exploited remotely. The library's continuous delivery model with rolling releases complicates patch tracking, as security fixes are committed without versioned releases. The vulnerability is classified under CWE-190 (Integer Overflow or Wraparound) and CWE-189 (Numeric Errors).

Defensive priority

high

Recommended defensive actions

  • Monitor the Nothings stb GitHub repository for security commits addressing the stb_dupreplace function
  • Implement strict input validation on all image data processed by stb image.h functions
  • Consider using memory-safe alternatives or sandboxing for untrusted image processing
  • Review and update dependency management to track commit-level changes given the rolling release model
  • Conduct code review of stb_dupreplace usage in your applications to identify potential exposure

Evidence notes

Vulnerability identified in stb_dupreplace function leading to integer overflow. CVSS 4.0 vector indicates network attack vector with low attack complexity, no privileges required, but user interaction needed. CPE indicates affected versions up to 2.13. CWE-189 (Numeric Errors) and CWE-190 (Integer Overflow or Wraparound) classified.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-3408 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-3408

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2025-3408 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-3408

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.