{"id":"CVE-2023-5217","published":"2023-09-28T16:15:10Z","modified":"2026-06-17T06:48:06Z","title":"Google Chromium libvpx Heap Buffer Overflow Vulnerability","vendor":"Google","product":"Chromium libvpx","tier":"core","eol":null,"description":{"text":"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)","provenance":"source","from":"NVD"},"summary":{"text":"The flaw is a heap buffer overflow in the VP8 encoding code of libvpx, the VP8/VP9 video codec library bundled with Google Chrome. An attacker who can get a victim to load a crafted HTML page can potentially corrupt heap memory, with no authentication or additional configuration required beyond the victim's browser user interaction.","provenance":"ai","model":"claude-haiku-5-5","generatedAt":"2026-10-23T07:10:28Z"},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"NVD"},"epss":{"score":0.49013,"percentile":0.98878,"date":"2026-10-29","provenance":"source"},"kev":{"dateAdded":"2023-10-02","dueDate":"2023-10-23","ransomware":false,"requiredAction":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","notes":"https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_27.html; https://nvd.nist.gov/vuln/detail/CVE-2023-5217","provenance":"source"},"vulncheckKev":{"dateAdded":"2023-09-25","exploitedFirstSeen":"2023-09-25","ransomware":false,"evidence":[{"url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","date":"2023-09-25"},{"url":"https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2023-Sep","date":"2023-09-29"},{"url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","date":"2023-10-02"},{"url":"https://ti.qianxin.com/uploads/2024/02/02/dcc93e586f9028c68e7ab34c3326ff31.pdf","date":"2024-02-02"},{"url":"https://storage.googleapis.com/gweb-uniblog-publish-prod/documents/Buying_Spying_-_Insights_into_Commercial_Surveillance_Vendors.pdf","date":"2024-02-06"},{"url":"https://thehackernews.com/2024/02/global-coalition-and-tech-giants-unite.html","date":"2024-02-07"},{"url":"https://storage.googleapis.com/gweb-uniblog-publish-prod/documents/Year_in_Review_of_ZeroDays.pdf","date":"2024-03-27"},{"url":"https://www.ox.security/wp-content/uploads/2025/05/The-KEV-Illusion-Separating-True-Threats-from-Pretend-Critical-Risks-v4.pdf","date":"2025-05-30"}],"evidenceTotal":8,"provenance":"source"},"exploited":true,"otx":{"pulseCount":50,"pulses":[{"name":"Actively_Exploited_Kev 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2026","url":"https://otx.alienvault.com/pulse/6ad78130c4d1ac2be83a8b6d","created":"2026-10-20"},{"name":"Actively_Exploited_Kev | Oct 20, 2026","url":"https://otx.alienvault.com/pulse/6ad62f63c24a405a3423cc13","created":"2026-10-19"},{"name":"Actively_Exploited_Kev | Oct 19, 2026","url":"https://otx.alienvault.com/pulse/6ad4dda174e5797d0bd238b7","created":"2026-10-18"}],"provenance":"machine"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"references":[{"url":"http://seclists.org/fulldisclosure/2023/Oct/12","tags":["Mailing List","Third Party Advisory"]},{"url":"http://seclists.org/fulldisclosure/2023/Oct/16","tags":["Mailing List","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2023/09/28/5","tags":["Mailing List","Patch","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2023/09/28/6","tags":["Mailing List","Patch","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2023/09/29/1","tags":["Mailing 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This flaw was part of a spyware campaign. The exploitation allowed for program crashes or arbitrary code execution, ultimately resulting in the installation of spyware.","confidence":"high"},{"id":"T1574","name":"Hijack Execution Flow","tactics":["execution","stealth"],"provenance":"source","basis":"ctid-kev","bases":["ctid-kev"],"basisDetail":"CTID Mappings Explorer KEV 07/28/2025 (ATT&CK 16.1); capability: Buffer Overflow","mappingType":"primary_impact","evidence":[],"comment":"This vulnerability was exploited by a remote attacker using a crafted HTML page to trigger a heap buffer overflow in the vp8 encoding of libvpx, leading to heap corruption. This flaw was part of a spyware campaign. The exploitation allowed for program crashes or arbitrary code execution, ultimately resulting in the installation of spyware.","confidence":"high"}],"reports":[],"affected":[{"ecosystem":"npm","package":"electron","vulnerableRanges":["<22.3.25",">=24.0.0, <24.8.5",">=25.0.0, <25.8.4",">=26.0.0, <26.2.4",">=27.0.0-alpha.1, <27.0.0-beta.8"],"patched":["22.3.25","24.8.5","25.8.4","26.2.4","27.0.0-beta.8"],"from":["GHSA-qqvq-6xgj-jw8g"],"provenance":"source"}],"advisories":[{"id":"GHSA-qqvq-6xgj-jw8g","url":"https://github.com/advisories/GHSA-qqvq-6xgj-jw8g","severity":"HIGH","ecosystem":"npm","package":"electron","vulnerableRanges":["<22.3.25"],"patched":["22.3.25"],"provenance":"source","from":"GHSA"},{"id":"GHSA-qqvq-6xgj-jw8g","url":"https://github.com/advisories/GHSA-qqvq-6xgj-jw8g","severity":"HIGH","ecosystem":"npm","package":"electron","vulnerableRanges":[">=24.0.0, <24.8.5"],"patched":["24.8.5"],"provenance":"source","from":"GHSA"},{"id":"GHSA-qqvq-6xgj-jw8g","url":"https://github.com/advisories/GHSA-qqvq-6xgj-jw8g","severity":"HIGH","ecosystem":"npm","package":"electron","vulnerableRanges":[">=25.0.0, <25.8.4"],"patched":["25.8.4"],"provenance":"source","from":"GHSA"},{"id":"GHSA-qqvq-6xgj-jw8g","url":"https://github.com/advisories/GHSA-qqvq-6xgj-jw8g","severity":"HIGH","ecosystem":"npm","package":"electron","vulnerableRanges":[">=26.0.0, <26.2.4"],"patched":["26.2.4"],"provenance":"source","from":"GHSA"},{"id":"GHSA-qqvq-6xgj-jw8g","url":"https://github.com/advisories/GHSA-qqvq-6xgj-jw8g","severity":"HIGH","ecosystem":"npm","package":"electron","vulnerableRanges":[">=27.0.0-alpha.1, <27.0.0-beta.8"],"patched":["27.0.0-beta.8"],"provenance":"source","from":"GHSA"}],"euvd":{"id":"EUVD-2023-2578","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-2578","exploited":true,"exploitedSince":"2023-10-02","provenance":"source"},"exploits":[],"exploitSources":{"pocGithub":{"count":1,"skipped":2,"earliest":"2023-10-06","earliestUrl":"https://github.com/UT-Security/cve-2023-5217-poc","repos":[{"name":"UT-Security/cve-2023-5217-poc","url":"https://github.com/UT-Security/cve-2023-5217-poc","stars":16,"created":"2023-10-06"}]},"first":{"date":"2023-10-06","source":"PoC-in-GitHub","url":"https://github.com/UT-Security/cve-2023-5217-poc"},"provenance":"source"},"exploitRefs":["https://crbug.com/1486441"],"flow":[{"stage":"exploitation","techniques":["T1204.001"],"provenance":"source"},{"stage":"primary","techniques":["T1574"],"provenance":"source"}],"timeline":[{"date":"2023-09-25","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit","provenance":"source"},{"date":"2023-09-28","kind":"published","label":"Published (NVD)","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5217","provenance":"source"},{"date":"2023-10-02","kind":"kev","label":"Added to CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","provenance":"source"},{"date":"2023-10-02","kind":"euvd-exploited","label":"ENISA EUVD: exploited","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-2578","provenance":"source"},{"date":"2023-10-06","kind":"exploit-public","label":"First public exploit: PoC-in-GitHub","url":"https://github.com/UT-Security/cve-2023-5217-poc","provenance":"source"}],"speed":{"daysToPublicExploit":8,"firstExploitFrom":"PoC-in-GitHub","daysToKev":4},"priority":{"score":68.9,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in CISA KEV and VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1131 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":19.78,"detail":"percentile 0.9888"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":5.0,"detail":"1 NVD reference tagged Exploit; 1 PoC-in-GitHub repo"},{"name":"Mentioned in OTX pulses","points":3.0,"detail":"50 pulses"},{"name":"CVSS severity","points":6.16,"detail":"base score 8.8"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]},"lineage":{"familyId":"fam-class-google-chrome-cwe-787","packageHistory":[{"cve":"CVE-2023-39956","published":"2023-09-06","fixed":"26.0.0-beta.13","kev":false},{"cve":"CVE-2023-44402","published":"2023-12-01","fixed":"27.0.0-alpha.7","kev":false},{"cve":"CVE-2023-4863","published":"2023-09-12","fixed":"27.0.0-beta.2","kev":true,"link":{"from":"CVE-2023-4863","to":"CVE-2023-5217","relation":"successor","confidence":"low","kind":"sequence","evidence":[{"kind":"version-step","provenance":"source","package":"npm:electron","fromFixed":"22.3.24","toFixed":"22.3.25","daysApart":16},{"kind":"version-step","provenance":"source","package":"npm:electron","fromFixed":"24.8.3","toFixed":"24.8.5","daysApart":16}]}},{"cve":"CVE-2023-5217","published":"2023-09-28","fixed":"27.0.0-beta.8","kev":true},{"cve":"CVE-2024-46993","published":"2025-07-01","fixed":"30.0.3","kev":false},{"cve":"CVE-2024-46992","published":"2025-07-01","fixed":"31.0.0-beta.1","kev":false},{"cve":"CVE-2025-55305","published":"2025-09-04","fixed":"38.0.0-beta.6","kev":false}],"package":"npm:electron"}}