Description
In etcd before versions 3.3.23 and 3.4.10, a large slice causes panic in decodeRecord method. The size of a record is stored in the length field of a WAL file and no additional validation is done on this data. Therefore, it is possible to forge an extremely large frame size that can unintentionally panic at the expense of any RAFT participant trying to decode the WAL.
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 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SUSE Package Hub 15 SP6 | etcd | 3.5.12-bp156.4.3.1 | openSUSE-SU-2025:0003-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | etcd | 3.4.16-3.1 | openSUSE-SU-2024:10741-1 |
| openSUSE Leap 15.6 | etcd | 3.5.12-bp156.4.3.1 | openSUSE-SU-2025:0003-1, 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 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | go.etcd.io/etcd | < 0.5.0-alpha.5.0.20200423152442-f4b650b51dc4 | 0.5.0-alpha.5.0.20200423152442-f4b650b51dc4 | GHSA-p4g4-wgrh-qrg2 |
| Go | go.etcd.io/etcd/v3 | < 3.3.23 | 3.3.23 | GHSA-m332-53r6-2w93 |
| Go | go.etcd.io/etcd/v3 | >= 3.4.0, < 3.4.10 | 3.4.10 | GHSA-m332-53r6-2w93 |
Advisories 9
- 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
- openSUSE-SU-2025:0003-1 Security update for etcd SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10741-1 etcd-3.4.16-3.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 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