etcd denial of service vulnerability

published 2023-08-22 3 y ago modified 2026-09-10 1 mo ago also BIT-etcd-2022-34038 , EUVD-2023-2222 , GHSA-65rp-cv85-263x

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

Etcd v3.5.4 allows remote attackers to cause a denial of service via function PageWriter.write in pagewriter.go. NOTE: the vendor's position is that this is not a vulnerability.

Patch / fix

fixed in 1 links 2

bitnami etcd 3.5.5

github.com/etcd-io/etcd#14022 pull request
github.com/etcd-io/etcd#14452 pull request

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-34038 updated 2026-11-05 cvss 7.5

etcd: remote DoS via PageWriter.write

Red Hat Enterprise Linux 7 etcd
affected: workaround, no fix planned “Out of support scope”
Red Hat OpenStack Platform 16.1 etcd, openstack-etcd-container Red Hat OpenStack Platform 16.2 etcd, openstack-etcd-container Red Hat OpenStack Platform 17.0 etcd, openstack-etcd-container Red Hat OpenStack Platform 17.1 etcd, openstack-etcd-container Red Hat OpenStack Platform 18.0 etcd, openstack-etcd-container Red Hat Storage 3 etcd
affected: workaround, no fix available

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 y ago (2024-10-03)

Exploit prediction

1.75% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
bitnami	etcd	>=3.5.4, <3.5.5	3.5.5

Classification

Weakness

CWE-787 Out-of-bounds Write

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary