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CVE-2019-18960

32
FAUCET Score

CVE-2019-18960 describes a critical buffer overflow vulnerability in the vsock implementation of Amazon Firecracker versions 0.18.0 and 0.19.0. With a CVSS score of 9.8, this flaw is easily exploitable over the network without user interaction, potentially leading to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation or publicly available exploit code, the vulnerability has garnered significant community discussion, indicating awareness and potential for future exploitation. Organizations using affected Firecracker versions should prioritize patching to mitigate this high-risk vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
0.18.0CPE matchmatch criteria
cpe:2.3:a:amazon:firecracker:0.18.0:*:*:*:*:*:*:*
0.19.0CPE matchmatch criteria
cpe:2.3:a:amazon:firecracker:0.19.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.25%
Probability of exploitation in next 30 days
EPSS Percentile
87.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0325 is in the 79th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / firecracker-microvm/firecracker/issues/1462
Third Party Advisory
github.com / firecracker-microvm/firecracker/releases
Release NotesThird Party Advisory
github.com / firecracker-microvm/firecracker/releases/tag/v0.18.1
Release NotesThird Party Advisory
github.com / firecracker-microvm/firecracker/releases/tag/v0.19.1
Release NotesThird Party Advisory
openwall.com / lists/oss-security/2019/12/10/1
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2022/09/11/2
Mailing ListThird Party Advisory