CVE-2023-5217

Exp

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)

Published: 2023-09-28 Last update: 2025-10-24 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-5217 is rated Critical Active Threat (91.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.98%). CISA KEV confirms active exploitation (added 2023-10-02) affecting Google / Chromium libvpx. a weakness (CWE-787) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

CISA KEV Record for CVE-2023-5217

Name: Google Chromium libvpx Heap Buffer Overflow Vulnerability · CISA KEV detail

Exploit added: 2023-10-02

Action due: 2023-10-23

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

Public exploit references (Exploit-DB) for CVE-2023-5217

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2023-5217

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-23 5.38% 4.98% -0.41%
2 2026-05-12 4.17% 5.38% +1.21%
3 2026-04-21 — 4.17% —

Full EPSS history (68 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-5217

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-5217

GitHub Security Advisory for CVE-2023-5217

GHSA-qqvq-6xgj-jw8g · Severity: high · Ecosystem: npm — Electron affected by libvpx's heap buffer overflow in vp8 encoding

OS Trackers for CVE-2023-5217

vendor priority summary link
alpine — CVE-2023-5217: 3 source package rows (firefox-esr, libvpx, qt5-qtwebengine); 23 state rows across 6 repos (3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 19, open 4. https://security.alpinelinux.org/vuln/CVE-2023-5217
debian unimportant CVE-2023-5217 unimportant priority: Debian including 5 source packages (chromium, firefox, firefox-esr, libvpx, thunderbird), 21 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 16, open 5. https://security-tracker.debian.org/tracker/CVE-2023-5217
gentoo high CVE-2023-5217: 2 GLSA(s) (202310-04, 202401-34), 4 atom(s) (media-libs/libvpx, www-client/chromium, www-client/google-chrome, www-client/microsoft-edge); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2023-5217
redhat high — https://access.redhat.com/security/cve/CVE-2023-5217
suse high CVE-2023-5217 severity important: SUSE including 362 source package names (0.3.2-1.2:libvpx7-1.11.0-150400.3.3.1, 0.3.32-3.4:libvpx7-1.11.0-150400.3.3.1, …), 594 product×package rows across 81 product lines (Container containers/lmcache-vllm-openai, Container containers/open-webui, … (81 product lines)): Fixed 362, Known Affected 231, Known Not Affected 1. https://www.suse.com/security/cve/CVE-2023-5217/
ubuntu high CVE-2023-5217 high priority: Ubuntu including 10 source packages (chromium-browser, firefox, …), 100 status rows across 10 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, trusty, upstream, xenial): DNE 44, ignored 27, released 15, not-affected 12, needs-triage 2. https://ubuntu.com/security/CVE-2023-5217

Affected software / configurations for CVE-2023-5217

Vendor Product Version Raw CPE
webmproject libvpx < 1.13.1 cpe:2.3:a:webmproject:libvpx:*:*:*:*:*:*:*:*
microsoft edge 116.0.1938.98 cpe:2.3:a:microsoft:edge:116.0.1938.98:*:*:*:*:*:*:*
microsoft edge 117.0.2045.47 cpe:2.3:a:microsoft:edge:117.0.2045.47:*:*:*:*:*:*:*
microsoft edge_chromium 116.0.5845.229 cpe:2.3:a:microsoft:edge_chromium:116.0.5845.229:*:*:*:*:*:*:*
microsoft edge_chromium 117.0.5938.132 cpe:2.3:a:microsoft:edge_chromium:117.0.5938.132:*:*:*:*:*:*:*
mozilla firefox < 115.3.1 cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
mozilla firefox < 118.0.1 cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
mozilla firefox < 118.1 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:android:*:*
mozilla thunderbird < 115.3.1 cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
fedoraproject fedora 37 cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
fedoraproject fedora 38 cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
fedoraproject fedora 39 cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
debian debian_linux 10.0 cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
debian debian_linux 11.0 cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
debian debian_linux 12.0 cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*
apple ipados >= 17.0, < 17.0.3 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple ipados 16.7 cpe:2.3:o:apple:ipados:16.7:*:*:*:*:*:*:*
apple iphone_os >= 17.0, < 17.0.3 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple iphone_os 16.7 cpe:2.3:o:apple:iphone_os:16.7:*:*:*:*:*:*:*
google chrome < 117.0.5938.132 cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
redhat enterprise_linux 9.0 cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

References for CVE-2023-5217

URL Tags
http://seclists.org/fulldisclosure/2023/Oct/12 Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2023/Oct/16 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/28/5 Mailing List Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/28/6 Mailing List Patch Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/29/1 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/29/11 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/29/12 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/29/14 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/29/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/29/7 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/29/9 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/30/1 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/30/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/30/3 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/30/4 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/09/30/5 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/10/01/1 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/10/01/2 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/10/01/5 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/10/02/6 Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/10/03/11 Mailing 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
https://bugzilla.redhat.com/show_bug.cgi?id=2241191 Issue Tracking Third Party Advisory
https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_27.html Vendor Advisory
https://crbug.com/1486441 Exploit Issue Tracking
https://github.com/webmproject/libvpx/commit/3fbd1dca6a4d2dad332a2110d646e4ffef36d590 Patch
https://github.com/webmproject/libvpx/commit/af6dedd715f4307669366944cca6e0417b290282 Patch
https://github.com/webmproject/libvpx/releases/tag/v1.13.1 Release Notes
https://github.com/webmproject/libvpx/tags Product
https://lists.debian.org/debian-lts-announce/2023/09/msg00038.html Mailing List
https://lists.debian.org/debian-lts-announce/2023/10/msg00001.html Mailing List
https://lists.debian.org/debian-lts-announce/2023/10/msg00015.html Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/4MFWDFJSSIFKWKNOCTQCFUNZWAXUCSS4/ Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/55YVCZNAVY3Y5E4DWPWMX2SPKZ2E5SOV/ Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/AY642Z6JZODQJE7Z62CFREVUHEGCXGPD/ Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/BCVSHVX2RFBU3RMCUFSATVQEJUFD4Q63/ Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/CWEJYS5NC7KVFYU3OAMPKQDYN6JQGVK6/ Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/TE7F54W5O5RS4ZMAAC7YK3CZWQXIDSKB/ Mailing List
https://lists.fedoraproject.org/archives/list/[email protected]/message/WTRUIS3564P7ZLM2S2IH4Y4KZ327LI4I/ Mailing List
https://pastebin.com/TdkC4pDv Not Applicable
https://security-tracker.debian.org/tracker/CVE-2023-5217 Third Party Advisory
https://security.gentoo.org/glsa/202310-04 Third Party Advisory
https://security.gentoo.org/glsa/202401-34 Third Party Advisory
https://stackdiary.com/google-discloses-a-webm-vp8-bug-tracked-as-cve-2023-5217/ Third Party Advisory
https://support.apple.com/kb/HT213961 Third Party Advisory
https://support.apple.com/kb/HT213972 Third Party Advisory
https://twitter.com/maddiestone/status/1707163313711497266 Third Party Advisory
https://www.debian.org/security/2023/dsa-5508 Mailing List
https://www.debian.org/security/2023/dsa-5509 Mailing List
https://www.debian.org/security/2023/dsa-5510 Mailing List
https://www.mozilla.org/en-US/security/advisories/mfsa2023-44/ Third Party Advisory
https://www.openwall.com/lists/oss-security/2023/09/28/5 Mailing List Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-5217 US Government Resource
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