Description
In etcd before versions 3.3.23 and 3.4.10, it is possible to have an entry index greater then the number of entries in the ReadAll method in wal/wal.go. This could cause issues when WAL entries are being read during consensus as an arbitrary etcd consensus participant could go down from a runtime panic when reading the entry.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| etcd-io | etcd | < 3.3.23, < 3.4.10 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | etcd | 3.3.25+dfsg-5 | — |
| Debian 13 | etcd | 3.3.25+dfsg-5 | — |
| Debian 12 | etcd | 3.3.25+dfsg-5 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | etcd | No fix yet | — |
| Ubuntu 25.10 | etcd | No fix yet | — |
| Ubuntu 20.04 LTS | etcd | 3.2.26+dfsg-6ubuntu0.1 | USN-5628-1 |
| Ubuntu 16.04 LTS | etcd | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | etcd | No fix yet | — |
| Ubuntu Pro 24.04 LTS | etcd | No fix yet | — |
| Ubuntu Pro 22.04 LTS | etcd | No fix yet | — |
| Ubuntu Pro 18.04 LTS | etcd | 3.2.17+dfsg-1ubuntu0.1~esm1 | USN-5628-2 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Rhel Extras Other 7 | etcd | 3.2.32-1.el7_9 | RHSA-2021:1407 |
| Red Hat OpenStack 16 | etcd | 3.3.23-1.el8ost | RHSA-2021:0916 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | kubernetes | 1.17.13-4.21.2 | SUSE-SU-2020:3760-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.6 | etcd | 3.5.12-150000.7.6.1 | SUSE-SU-2024:3656-1 |
| openSUSE Leap 15.5 | etcd | 3.5.12-150000.7.6.1 | SUSE-SU-2024:3656-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | etcd | 3.5.0-3 | — |
Advisories 7
- RHSA-2021:0916 Red Hat Security Advisory: Red Hat OpenStack Platform 16.1.4 (etcd) security update Red Hat Security Advisories (RHSA) · Jun 27, 2026
- WID-SEC-2022-0510 IBM DB2: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 18, 2026
- USN-5628-2 etcd vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- USN-5628-1 etcd vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- RHSA-2021:1407 Red Hat Security Advisory: etcd security update Red Hat Security Advisories (RHSA) · Mar 27, 2026
- SUSE-SU-2024:3656-1 Security update for etcd SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:3760-1 Security changes in Kubernetes, etcd, and helm; Bugfix in cri-o package SUSE / openSUSE Security Updates · Feb 4, 2026