CVE-2026-3081

Summary

GStreamer H.266 Codec Parser Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation.

The specific flaw exists within the parsing of decoding units. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28839.

Affected Software

Weaknesses

• CWE-121: CWE-121: Stack-based Buffer Overflow

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

GStreamer: GStreamer: Arbitrary code execution via H.266 codec parsing stack-based buffer overflow

Additional References

• https://access.redhat.com/security/cve/CVE-2026-3081
• https://bugzilla.redhat.com/show_bug.cgi?id=2447494
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3081.json

References

• https://www.zerodayinitiative.com/advisories/ZDI-26-162/
• https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/2ffdfca2df95a7f605c922d3111e5d5be5314dca

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