cvedb.io
CVE-2025-27091
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2025-02-20T18:15:26.850 · Last modified 2026-06-17T09:03:00.933

Summary

OpenH264 is a free license codec library which supports H.264 encoding and decoding. A vulnerability in the decoding functions of OpenH264 codec library could allow a remote, unauthenticated attacker to trigger a heap overflow. This vulnerability is due to a race condition between a Sequence Parameter Set (SPS) memory allocation and a subsequent non Instantaneous Decoder Refresh (non-IDR) Network Abstraction Layer (NAL) unit memory usage. An attacker could exploit this vulnerability by crafting a malicious bitstream and tricking a victim user into processing an arbitrary video containing the malicious bistream. An exploit could allow the attacker to cause an unexpected crash in the victim's user decoding client and, possibly, perform arbitrary commands on the victim's host by abusing the h

Affected products

cisco — openh264

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.