{"id":"CVE-2020-27174","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-27174","generatedAt":"2026-10-27T22:26:25.203Z","title":"This can result in a memory leak on the microVM emulation thread, possibly occupying more memory than intended on the host.","description":"In Amazon AWS Firecracker before 0.21.3, and 0.22.x before 0.22.1, the serial console buffer can grow its memory usage without limit when data is sent to the standard input. This can result in a memory leak on the microVM emulation thread, possibly occupying more memory than intended on the host.","published":"2020-10-16T05:15:12.000Z","lastModified":"2026-06-17T03:08:54.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-401"],"affected":["amazon/firecracker"],"epss":{"score":0.01741,"percentile":0.77586,"date":"2026-10-26","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 (1.74%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2020/10/23/1","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/firecracker-microvm/firecracker/issues/2177","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/firecracker-microvm/firecracker/pull/2178","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/firecracker-microvm/firecracker/pull/2179","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.openwall.com/lists/oss-security/2020/10/23/1","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/firecracker-microvm/firecracker/issues/2177","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/firecracker-microvm/firecracker/pull/2178","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/firecracker-microvm/firecracker/pull/2179","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-27174","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."}