CVE-2026-5316Public exploitNetwork attack vector

Application crash via invalid setup pointer free

Published Apr 2, 2026 · Updated Apr 2, 2026

Invalid free in Sean Barrett stb 1.22 and earlier allows remote attackers to crash consuming applications via crafted Ogg Vorbis files. Malformed setup headers corrupt decoder state, causing vorbis_deinit to pass an invalid pointer through setup_free to free(). A user or application must decode the supplied file, and the demonstrated consequence is termination of that consuming process.

CVSS severity4.3
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Invalid free in Sean Barrett stb 1.22 and earlier allows remote attackers to crash consuming applications via crafted Ogg Vorbis files. Malformed setup headers corrupt decoder state, causing vorbis_deinit to pass an invalid pointer through setup_free to free(). A user or application must decode the supplied file, and the demonstrated consequence is termination of that consuming process.

The record

CVE
CVE-2026-5316
Published
Apr 2, 2026
Updated
Apr 2, 2026
Vendor
Sean Barrett
Product
stb
Classifications
CWE-400, CWE-770, T1499.004, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0
  2. Affected versionversion=1.1
  3. Affected versionversion=1.10
  4. Affected versionversion=1.11
  5. Affected versionversion=1.12
  6. Affected versionversion=1.13
  7. Affected versionversion=1.14
  8. Affected versionversion=1.15
  9. Affected versionversion=1.16
  10. Affected versionversion=1.17
  11. Affected versionversion=1.18
  12. Affected versionversion=1.19
  13. Affected versionversion=1.2
  14. Affected versionversion=1.20
  15. Affected versionversion=1.21
  16. Affected versionversion=1.22
  17. Affected versionversion=1.3
  18. Affected versionversion=1.4
  19. Affected versionversion=1.5
  20. Affected versionversion=1.6
  21. Affected versionversion=1.7
  22. Affected versionversion=1.8
  23. Affected versionversion=1.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Sean Barrett · stbversion=1.0; version=1.1; version=1.10; version=1.11; version=1.12; version=1.13; version=1.14; version=1.15; version=1.16; version=1.17; version=1.18; version=1.19; version=1.2; version=1.20; version=1.21; version=1.22; version=1.3; version=1.4; version=1.5; version=1.6; version=1.7; version=1.8; version=1.9

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
5.0VulDBAV:N/AC:L/Au:N/C:N/I:N/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
4.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
CWE-770Allocation of Resources Without Limits or Throttling
T1499.004Endpoint Denial of Service: Application or System Exploitation
T1204.002User Execution: Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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