CVE-2020-16843 json
In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic.
published 2020-08-04 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-8804
- cvss
- 5.9
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.7%
- EPSS 1.7% chance of exploitation in 30 days, percentile 76%
- public exploits
- 0
- none known
Summary
In Firecracker 0.20.x before 0.20.1 and 0.21.x before 0.21.2, the network stack can freeze under heavy ingress traffic. This can result in a denial of service on the microVM when it is configured with a single network interface, and an availability problem for the microVM network interface on which the issue is triggered.
Exploit prediction
1.67% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
References
-
github.com
/firecracker-microvm/firecracker/issues/2057
mitigation, third-party-advisory
-
openwall.com
/lists/oss-security/2020/08/13/1
mailing-list, third-party-advisory
-
openwall.com
/lists/oss-security/2020/08/13/1
mailing-list, third-party-advisory
Sources
- CVE List CVE-2020-16843
- NVD CVE-2020-16843
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