{"id":"CVE-2020-27174","aliases":["EUVD-2020-19698","GHSA-w7c8-xhpc-x95j"],"status":"published","title":"In Amazon AWS Firecracker before 0.21.3, and 0.22.x before 0.22.1, the serial console buffer can...","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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01741,"percentile":0.77936,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119","CWE-401"],"published":"2020-10-16T04:06:54Z","modified":"2026-10-20T10:52:58Z","products":[{"vendor":"amazon","product":"firecracker"}],"references":[{"url":"https://github.com/firecracker-microvm/firecracker/issues/2177","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://github.com/firecracker-microvm/firecracker/pull/2178","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/firecracker-microvm/firecracker/pull/2179","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"http://www.openwall.com/lists/oss-security/2020/10/23/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27174"},{"url":"https://github.com/advisories/GHSA-w7c8-xhpc-x95j"}],"sources":{"cve":[{"id":"CVE-2020-27174","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.","status":"published","published":"2020-10-16T04:06:54Z","modified":"2024-08-04T16:11:35.839Z","updated_at":"2026-11-02T14:35:53.552996Z"}],"euvd":[{"id":"EUVD-2020-19698","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.","status":"published","published":"2020-10-16T04:06:54Z","modified":"2024-08-04T16:11:35Z","updated_at":"2026-11-03T03:07:13.515696Z"}],"ghsa":[{"id":"GHSA-w7c8-xhpc-x95j","title":"In Amazon AWS Firecracker before 0.21.3, and 0.22.x before 0.22.1, the serial console buffer can...","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.","status":"published","published":"2022-05-24T17:31:04Z","modified":"2023-01-29T05:04:55Z","cwes":["CWE-119"],"updated_at":"2026-11-02T14:45:40.253766Z"}],"nvd":[{"id":"CVE-2020-27174","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.","status":"published","published":"2020-10-16T05:15:11.83Z","modified":"2026-06-17T03:08:54.153Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-401"],"updated_at":"2026-11-02T14:06:19.351389Z"}],"osv":[{"id":"CVE-2020-27174","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.","status":"published","published":"2020-10-16T05:15:11.83Z","modified":"2026-10-20T10:52:58.955383392Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:16.248747Z"}]}}