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CVE-2020-15106

23
FAUCET Score

CVE-2020-15106 is a denial-of-service vulnerability affecting etcd versions prior to 3.3.23 and 3.4.10. An authenticated attacker can craft a malicious Write-Ahead Log (WAL) file with an oversized record length, causing etcd to panic when attempting to decode it. This medium-severity vulnerability (CVSS 6.5) has a low attack complexity and can lead to a complete loss of availability for affected etcd instances. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.3.23CPE matchmatch criteria
cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:*
>= 3.4.0, < 3.4.10CPE matchmatch criteria
cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:*
32CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.29%
Probability of exploitation in next 30 days
EPSS Percentile
67.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0129 is in the 81st percentile among its peer group of 21,974 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (10)

gopatch availablevia ghsa
Product: go.etcd.io/etcdFixed in: 0.5.0-alpha.5.0.20200423152442-f4b650b51dc4
microsoftpatch availablevia msrc
Product: 19204-16823Fixed in: 3.5.0-3
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 3.5.0-3
microsoftpatch availablevia msrc
Product: cbl2 etcd 3.5.0-3 on CBL Mariner 2.0Fixed in: 3.5.0-3
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 3.5.0-3
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7 ExtrasFixed in: etcd-0:3.2.32-1.el7_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenShift Container Platform 4.8Fixed in: openshift4/ose-etcd:v4.8.0-202106152230.p0.git.aefa6bf.assembly.stream
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 16.1Fixed in: etcd-0:3.3.23-1.el8ost
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenStack Platform 15 (Stein)Fixed in: etcd
redhatend of lifevia redhat_api
Product: Red Hat Storage 3Fixed in: etcd

Vendor Advisories (4)

goGHSA-p4g4-wgrh-qrg2low

Panic due to malformed WALs in go.etcd.io/etcd

Feb 7, 2023
microsoft2021-Dec/CVE-2020-15106

CVE-2020-15106

Dec 14, 2021
microsoft2020-Aug/CVE-2020-15106Moderate

Improper Input Validation in etcd

Aug 11, 2020
redhatCVE-2020-15106Moderate

etcd: Large slice causes panic in decodeRecord method

Aug 5, 2020

References

github.com / etcd-io/etcd/security/advisories/GHSA-p4g4-wgrh-qrg2
Third Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP