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CVE-2023-5217

HighPublished

Google Chromium libvpx Heap Buffer Overflow Vulnerability

Published: Sep 28, 2023
Updated: Oct 21, 2025
Assigning CNA: Chrome
Evidence observed: Oct 2, 2023

Primary CVSS

8.8/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

49.0%

Moderate · next 30 days

Percentile: 98.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

Heap buffer overflow in vp8 encoding in libvpx in Google Chrome prior to 117.0.5938.132 and libvpx 1.13.1 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

Sources

cve-2023-5217-pocPoC
A PoC to trigger CVE-2023-5217 from the Browser WebCodecs or MediaRecorder interface.

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