Platform
c
Component
stb
Fixed in
1.0.1
1.1.1
1.2.1
1.3.1
1.4.1
1.5.1
1.6.1
1.7.1
1.8.1
1.9.1
1.10.1
1.11.1
1.12.1
1.13.1
1.14.1
1.15.1
1.16.1
1.17.1
1.18.1
1.19.1
1.20.1
1.21.1
1.22.1
CVE-2026-5316 describes a resource exhaustion vulnerability found in Nothings stb, a single C file library for decoding various media formats. This flaw, located in the setupfree function of stbvorbis.c, allows a remote attacker to trigger excessive resource allocation, potentially leading to a denial-of-service (DoS) condition. The vulnerability affects versions 1.0 through 1.22 of Nothings stb, and a public exploit is available, increasing the risk of exploitation.
The primary impact of CVE-2026-5316 is a denial-of-service (DoS). An attacker can exploit this vulnerability by crafting malicious input that triggers the setup_free function to allocate excessive resources. This can exhaust system memory or other critical resources, causing the application or system using Nothings stb to crash or become unresponsive. Given the library's use in various multimedia applications and embedded systems, the potential blast radius is significant. The availability of a public exploit further elevates the risk, as it lowers the barrier to entry for attackers.
CVE-2026-5316 is publicly known with a proof-of-concept available, indicating a higher probability of exploitation. The vulnerability was disclosed on 2026-04-02. The vendor was contacted but did not respond, which may delay the availability of a patch. The EPSS score is likely medium, reflecting the public exploit and lack of vendor response.
Exploit Status
EPSS
0.04% (11% percentile)
CISA SSVC
CVSS Vector
The primary mitigation for CVE-2026-5316 is to upgrade to a patched version of Nothings stb. Unfortunately, a specific fixed version is not provided in the CVE details. Until a patch is released, consider implementing input validation and sanitization techniques to prevent the processing of malicious media files. Web application firewalls (WAFs) can be configured to filter potentially malicious requests. Monitoring system resource usage (CPU, memory) can help detect exploitation attempts. Since a public exploit exists, proactive monitoring is crucial.
No solution is available from the vendor. It is recommended to review the source code of stb_vorbis.c and apply the necessary mitigations to prevent excessive resource allocation in the setup_free function. Consider using a community-patched version or an alternative library.
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CVE-2026-5316 is a medium severity vulnerability in Nothings stb versions 1.0–1.22 that allows a remote attacker to trigger resource allocation issues, potentially leading to a denial-of-service.
You are affected if you are using Nothings stb versions 1.0 through 1.22. Check your project dependencies to determine if you are using this library and its version.
Upgrade to a patched version of Nothings stb. Since a specific fixed version is not provided, monitor for updates from the vendor and implement mitigation strategies like input validation in the meantime.
Yes, a public proof-of-concept exploit is available, indicating a higher likelihood of active exploitation.
As of the disclosure date, the vendor has not released an official advisory. Monitor the Nothings stb project's website and GitHub repository for updates.
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