CVE-2023-5217Actively exploitedAdded to KEV 2023-10-02High severity, CVSS 8.8

Google Chromium libvpx Heap Buffer Overflow Vulnerability

Google, Chromium libvpx

Description

Google Chromium libvpx contains a heap buffer overflow vulnerability in vp8 encoding that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could impact web browsers using libvpx, including but not limited to Google Chrome.

CVSS severity

High (8.8/10)

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

Sourced from NVD, reflects how severe this vulnerability is if exploited, not whether it has been. Every advisory on this page is already a CISA-confirmed active exploitation case regardless of its CVSS score.

EPSS, exploit probability

High

49.0%

estimated chance of real-world exploitation in the next 30 days, higher than 98.9% of every CVE FIRST.org scores

Refreshed 10/28/2026, via FIRST.org's EPSS model, not CVSS, this measures likelihood of exploitation, not how severe it would be.

Public exploit references (via NVD)

Required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

CISA-recommended due date: 2023-10-23

CWE-787

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