{"id":"CVE-2018-6548","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-6548","generatedAt":"2026-10-28T23:37:55.465Z","title":"A use-after-free issue was discovered in libwebm through 2018-02-02.","description":"A use-after-free issue was discovered in libwebm through 2018-02-02. If a Vp9HeaderParser was initialized once before, its property frame_ would not be changed because of code in vp9parser::Vp9HeaderParser::SetFrame. Its frame_ could be freed while the corresponding pointer would not be updated, leading to a dangling pointer. This is related to the function OutputCluster in webm_info.cc.","published":"2018-02-02T09:29:01.000Z","lastModified":"2026-06-17T02:02:00.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-416"],"affected":["webmproject/libwebm"],"epss":{"score":0.01387,"percentile":0.72111,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://bugs.chromium.org/p/webm/issues/detail?id=1493","tags":["Permissions Required"],"source":"cve@mitre.org"},{"url":"https://github.com/dwfault/PoCs/blob/master/libwebm%20Vp9HeaderParser%20UAF%20by%20PrintVP9Info/libwebm%20Vp9HeaderParser%20UAF%20by%20PrintVP9Info.md","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://bugs.chromium.org/p/webm/issues/detail?id=1493","tags":["Permissions Required"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/dwfault/PoCs/blob/master/libwebm%20Vp9HeaderParser%20UAF%20by%20PrintVP9Info/libwebm%20Vp9HeaderParser%20UAF%20by%20PrintVP9Info.md","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-6548","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}