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Stack-based Buffer OverflowWeakness · CWE-121

CVE-2026-59692

HIGH · 7.5 CVSS v3.1 Published 2026-07-09
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click 6 weeks old

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A stack buffer overflow vulnerability was found in GStreamer's DTLS plugin. During a DTLS handshake, the peer certificate Subject Distinguished Name is printed into a fixed-size 2048-byte stack buffer without bounds checking. A remote unauthenticated attacker can send a certificate with an oversized Subject DN that exceeds the buffer, causing a stack buffer overflow and process crash, resulting in denial of service.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A stack buffer overflow exists in GStreamer's DTLS plugin where the peer certificate's Subject Distinguished Name is copied into a fixed 2048-byte stack buffer during DTLS handshake without proper bounds checking, allowing a remote attacker to crash the process via an oversized certificate Subject DN.

MitigationApply the vendor patch to GStreamer that adds bounds checking when printing the certificate Subject DN into the stack buffer, or upgrade to a patched version of the DTLS plugin.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify GStreamer installation
    Run 'gst-inspect-1.0 --version' or check for gstreamer packages (dpkg -l | grep gstreamer, rpm -qa | grep gstreamer)
    Affected if GStreamer is not installed - not affected
  2. Check GStreamer version
    Run 'gst-inspect-1.0 --version' to get the version number, then compare against the version that includes the fix for CVE-2026-59692
    Affected if Version is older than the patched version - potentially affected
  3. Verify DTLS plugin presence
    Run 'gst-inspect-1.0 dtls' to check if the DTLS plugin is available and loaded
    Affected if DTLS plugin is not installed - not affected
  4. Check for DTLS usage in application config
    Inspect application configurations or logs for DTLS-enabled pipelines or connections (look for 'dtls' in GStreamer pipeline strings or config files)
    Affected if DTLS functionality is actively used - potentially affected

User is affected if GStreamer with the DTLS plugin is installed and DTLS connections are in use, and the version predates the security fix for this overflow vulnerability.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the vendor patch to GStreamer that adds bounds checking when printing the certificate Subject DN into the stack buffer, or upgrade to a patched version of the DTLS plugin.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA4.0 h
22.0 hours of engineering $3,860
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-59692 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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