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High 8.8Known exploited (CISA KEV)Published Sep 28, 2023
CVE-2023-5217Heap 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.
Updated under an hour ago ()
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It affects Google Chrome and 11 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Oct 2, 2023; federal agencies had to remediate by Oct 23, 2023. Treat that date as your deadline.
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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)
- CVSS
- 8.8 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-787
- Known exploited
- Added to CISA KEV Oct 2, 2023; federal remediation due Oct 23, 2023Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- EPSS (exploitation in the next 30 days)
- 49.01% (percentile 99)
- Assigned by
- Chrome
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Google Chrome google:chrome (from the name) | from 117.0.5938.132 before 117.0.5938.132 | CNA record |
Google libvpx google:libvpx (from the name) | from 1.13.1 before 1.13.1 | CNA record |
webmproject libvpx webmproject:libvpx | before 1.13.1 | NVD |
microsoft edge microsoft:edge | 116.0.1938.98; 117.0.2045.47 | NVD |
microsoft edge_chromium microsoft:edge_chromium | 116.0.5845.229; 117.0.5938.132 | NVD |
mozilla firefox mozilla:firefox | before 115.3.1; before 118.0.1; before 118.1 | NVD |
mozilla thunderbird mozilla:thunderbird | before 115.3.1 | NVD |
fedoraproject fedora fedoraproject:fedora | 37; 38; 39 | NVD |
debian debian_linux debian:debian_linux | 10.0; 11.0; 12.0 | NVD |
apple ipados apple:ipados | from 17.0 before 17.0.3; 16.7 | NVD |
apple iphone_os apple:iphone_os | from 17.0 before 17.0.3; 16.7 | NVD |
google chrome google:chrome | before 117.0.5938.132 | NVD |
redhat enterprise_linux redhat:enterprise_linux | 9.0 | NVD |
References
- https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_27.htmlvendor-advisory
- https://crbug.com/1486441exploit, issue-tracking
- http://www.openwall.com/lists/oss-security/2023/09/28/5mailing-list, patch, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/09/28/6mailing-list, patch, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/09/29/1mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/09/29/2mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/09/29/7mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/09/29/9mailing-list, third-party-advisory
- https://www.mozilla.org/en-US/security/advisories/mfsa2023-44/
- https://security-tracker.debian.org/tracker/CVE-2023-5217
- https://bugzilla.redhat.com/show_bug.cgi?id=2241191issue-tracking, third-party-advisory
- https://stackdiary.com/google-discloses-a-webm-vp8-bug-tracked-as-cve-2023-5217/
- https://www.openwall.com/lists/oss-security/2023/09/28/5
- https://pastebin.com/TdkC4pDv
- https://github.com/webmproject/libvpx/commit/3fbd1dca6a4d2dad332a2110d646e4ffef36d590
- https://github.com/webmproject/libvpx/commit/af6dedd715f4307669366944cca6e0417b290282
- https://github.com/webmproject/libvpx/tags
- http://www.openwall.com/lists/oss-security/2023/09/29/11mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/09/29/12mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/09/29/14mailing-list, third-party-advisory
- https://www.debian.org/security/2023/dsa-5510
- https://www.debian.org/security/2023/dsa-5509
- https://www.debian.org/security/2023/dsa-5508
- http://www.openwall.com/lists/oss-security/2023/09/30/1mailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2023/09/msg00038.html
- http://seclists.org/fulldisclosure/2023/Oct/12mailing-list, third-party-advisory
- http://seclists.org/fulldisclosure/2023/Oct/16mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/09/30/2mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/09/30/3mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/09/30/4mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/09/30/5mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/10/01/1mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/10/01/2mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/10/01/5mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/10/02/6mailing-list, third-party-advisory
- http://www.openwall.com/lists/oss-security/2023/10/03/11mailing-list, third-party-advisory
- https://arstechnica.com/security/2023/09/new-0-day-in-chrome-and-firefox-is-likely-to-plague-other-software/third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.