ClosedPatched

Google Chromium libvpx: Heap Buffer Overflow (CVE-2023-5217)

Google Chromium libvpx

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. Added to CISA KEV on 2023-10-02.

Why this severity: CVSS 8.8 (NVD), actively exploited (CISA KEV)

Started: Oct 2, 2023
Closed: Oct 2, 2023
CVE: CVE-2023-5217

Follow this incident

Updated Oct 2, 2023

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Oct 2, 2023
CISA added CVE-2023-5217 to the KEV catalog (due 2023-10-23).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).

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