CVE-2020-27174
HIGH
7.5
CVSS Score
Published: October 16, 2020 at 04:06 AM UTC
Updated: June 17, 2026 at 03:08 AM UTC
1 product affected across 1 vendorFirecracker
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Severity
HIGH7.5
Exploit prediction
EPSS 2%
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 0.21.30.22.0 ≤ v < 0.22.1
Affected range stops below 0.21.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 0.22.1, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2020/10/23/1x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/firecracker-microvm/firecracker/issues/2177x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/firecracker-microvm/firecracker/pull/2178x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/firecracker-microvm/firecracker/pull/2179CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-401
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