Medium
Security advisory
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2020-15106, CVE-2020-15112
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 10:51 UTC · Revision 1
Source evidence
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.
osv:CVE-2020-15106
Complete source record
{
"id": "628073838ecdb35a5274b28ef378e06159ae66e569737f462c97c660fb522695",
"url": "https://osv.dev/vulnerability/CVE-2020-15106",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2020-15106",
"summary": "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.",
"evidence": "osv:CVE-2020-15106",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2020-15106",
"aliases": [
"BIT-etcd-2020-15106",
"BIT-etcd-2020-15112",
"CVE-2020-15106",
"CVE-2020-15112",
"GHSA-m332-53r6-2w93",
"GHSA-p4g4-wgrh-qrg2",
"GO-2020-0005"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/etcd-io/etcd",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "4873f5516bd98c82dddb81247038337f25abac4e"
},
{
"introduced": "898bd1351fcf6e0ebce8d7c8bbbbf3f3e42aa42c"
},
{
"fixed": "18dfb9cca345bb2b2fbe73d5fc31028c2477bef1"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "3.3.23"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "3.4.0"
},
{
"fixed": "3.4.10"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"v3.3.22",
"v3.4.9",
"v3.4.8",
"v3.3.21",
"v3.3.20",
"v3.4.7",
"v3.3.19",
"v3.4.6",
"v3.4.5",
"v3.4.4",
"v3.3.18",
"v3.4.3",
"v3.3.17",
"v3.3.16",
"v3.4.2",
"v3.4.1",
"v3.4.0",
"v3.3.15",
"v3.3.14",
"v3.3.14-rc.0",
"v3.3.14-beta.0",
"v3.3.13",
"v3.3.12",
"v3.3.11",
"v3.3.10",
"v3.3.9",
"v3.3.8",
"v3.3.7",
"v3.3.6",
"v3.3.5",
"v3.3.4",
"v3.3.3",
"v3.3.2",
"v3.3.1",
"v3.3.0",
"v3.3.0-rc.4",
"v3.3.0-rc.3",
"v3.3.0-rc.2",
"v3.3.0-rc.1",
"v3.3.0-rc.0",
"v3.2.10_plus_git",
"v3.2.0_plus_git",
"v3.2.0+git",
"v3.2.0-rc.1",
"v3.2.0-rc.0",
"v3.1.0-rc.1",
"v3.1.0-rc.0",
"v3.1.0-alpha.1",
"v3.1.0-alpha.0",
"v3.0.0-beta.0",
"v2.3.0",
"v2.3.0-alpha.1",
"v2.3.0-alpha.0",
"v2.2.0",
"v2.2.0-rc.0",
"v2.2.0-alpha.1",
"v2.2.0-alpha.0",
"v2.1.1",
"v2.1.0",
"v2.1.0-rc.0",
"v2.1.0-alpha.1",
"v2.1.0-alpha.0",
"v2.0.4",
"v2.0.3",
"v2.0.2",
"v2.0.1",
"v2.0.0",
"v0.4.6",
"v2.0.0-rc.1",
"v0.5.0-alpha.5",
"v0.5.0-alpha.4",
"v0.5.0-alpha.3",
"v0.5.0-alpha.2",
"v0.5.0-alpha.1",
"v0.5.0-alpha.0",
"v0.4.5",
"v0.4.4",
"v0.4.3",
"v0.4.2",
"v0.4.1",
"v0.4.0",
"v0.3.0",
"v0.2.0-rc4",
"v0.2.0",
"v0.2.0-rc3",
"v0.2.0-rc2",
"v0.2.0-rc1",
"v0.1.2",
"v0.1.1",
"v0.1.0",
"0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15106.json"
}
}
],
"modified": "2026-10-20T10:51:51.888437017Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6B6R43Y7M3DCHWK3L3UVGE2K6WWECMP/",
"https://github.com/etcd-io/etcd/security/advisories/GHSA-p4g4-wgrh-qrg2"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*"
],
"vendor_product": "fedoraproject:fedora",
"extracted_events": [
{
"range": [
{
"introduced": "32"
},
{
"last_affected": "32"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2020-15106",
"evidence": "/id"
},
{
"value": "CVE-2020-15112",
"evidence": "/aliases"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 383037,
"published_at": "2020-08-05T19:15:10.903+00:00"
}