ubuntu-cve-2026-21998
Vulnerability from osv_ubuntu
Published
2026-04-21 21:16
Modified
2026-06-03 15:48
Summary
Details
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).
Severity
4.9 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
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{
"binary_name": "libmysqld-pic",
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{
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{
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{
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{
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{
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{
"binary_name": "mysql-testsuite-5.7",
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{
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},
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{
"binary_name": "percona-server-server",
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{
"binary_name": "percona-server-server-5.6",
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"binary_name": "percona-server-source-5.6",
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{
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]
},
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"purl": "pkg:deb/ubuntu/percona-server-5.6@5.6.22-rel71.0-0ubuntu4.1?arch=source\u0026distro=xenial"
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{
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{
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{
"binary_name": "mysql-server-core-5.7",
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{
"binary_name": "mysql-source-5.7",
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{
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{
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{
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{
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"binary_name": "mariadb-plugin-mroonga",
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{
"binary_name": "mariadb-plugin-oqgraph",
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{
"binary_name": "mariadb-plugin-rocksdb",
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{
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{
"binary_name": "mariadb-plugin-tokudb",
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{
"binary_name": "mariadb-server",
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{
"binary_name": "mariadb-server-10.3",
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{
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{
"binary_name": "mariadb-test-data",
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{
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"binary_version": "8.0.46-0ubuntu0.22.04.2"
},
{
"binary_name": "mysql-client-8.0",
"binary_version": "8.0.46-0ubuntu0.22.04.2"
},
{
"binary_name": "mysql-client-core-8.0",
"binary_version": "8.0.46-0ubuntu0.22.04.2"
},
{
"binary_name": "mysql-router",
"binary_version": "8.0.46-0ubuntu0.22.04.2"
},
{
"binary_name": "mysql-server",
"binary_version": "8.0.46-0ubuntu0.22.04.2"
},
{
"binary_name": "mysql-server-8.0",
"binary_version": "8.0.46-0ubuntu0.22.04.2"
},
{
"binary_name": "mysql-server-core-8.0",
"binary_version": "8.0.46-0ubuntu0.22.04.2"
},
{
"binary_name": "mysql-source-8.0",
"binary_version": "8.0.46-0ubuntu0.22.04.2"
},
{
"binary_name": "mysql-testsuite",
"binary_version": "8.0.46-0ubuntu0.22.04.2"
},
{
"binary_name": "mysql-testsuite-8.0",
"binary_version": "8.0.46-0ubuntu0.22.04.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "mysql-8.0",
"purl": "pkg:deb/ubuntu/mysql-8.0@8.0.46-0ubuntu0.22.04.2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.0.46-0ubuntu0.22.04.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.0.26-0ubuntu1",
"8.0.27-0ubuntu0.21.10.1",
"8.0.28-0ubuntu3",
"8.0.28-0ubuntu4",
"8.0.29-0ubuntu0.22.04.1",
"8.0.29-0ubuntu0.22.04.2",
"8.0.29-0ubuntu0.22.04.3",
"8.0.30-0ubuntu0.22.04.1",
"8.0.31-0ubuntu0.22.04.1",
"8.0.32-0buntu0.22.04.1",
"8.0.32-0ubuntu0.22.04.2",
"8.0.33-0ubuntu0.22.04.1",
"8.0.33-0ubuntu0.22.04.2",
"8.0.33-0ubuntu0.22.04.4",
"8.0.34-0ubuntu0.22.04.1",
"8.0.35-0ubuntu0.22.04.1",
"8.0.36-0ubuntu0.22.04.1",
"8.0.37-0ubuntu0.22.04.3",
"8.0.39-0ubuntu0.22.04.1",
"8.0.40-0ubuntu0.22.04.1",
"8.0.41-0ubuntu0.22.04.1",
"8.0.42-0ubuntu0.22.04.1",
"8.0.42-0ubuntu0.22.04.2",
"8.0.43-0ubuntu0.22.04.1",
"8.0.43-0ubuntu0.22.04.2",
"8.0.44-0ubuntu0.22.04.1",
"8.0.44-0ubuntu0.22.04.2",
"8.0.45-0ubuntu0.22.04.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libmysqlclient21",
"binary_version": "8.0.46-0ubuntu0.24.04.2"
},
{
"binary_name": "mysql-client",
"binary_version": "8.0.46-0ubuntu0.24.04.2"
},
{
"binary_name": "mysql-client-8.0",
"binary_version": "8.0.46-0ubuntu0.24.04.2"
},
{
"binary_name": "mysql-client-core-8.0",
"binary_version": "8.0.46-0ubuntu0.24.04.2"
},
{
"binary_name": "mysql-router",
"binary_version": "8.0.46-0ubuntu0.24.04.2"
},
{
"binary_name": "mysql-server",
"binary_version": "8.0.46-0ubuntu0.24.04.2"
},
{
"binary_name": "mysql-server-8.0",
"binary_version": "8.0.46-0ubuntu0.24.04.2"
},
{
"binary_name": "mysql-server-core-8.0",
"binary_version": "8.0.46-0ubuntu0.24.04.2"
},
{
"binary_name": "mysql-source-8.0",
"binary_version": "8.0.46-0ubuntu0.24.04.2"
},
{
"binary_name": "mysql-testsuite",
"binary_version": "8.0.46-0ubuntu0.24.04.2"
},
{
"binary_name": "mysql-testsuite-8.0",
"binary_version": "8.0.46-0ubuntu0.24.04.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "mysql-8.0",
"purl": "pkg:deb/ubuntu/mysql-8.0@8.0.46-0ubuntu0.24.04.2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.0.46-0ubuntu0.24.04.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.0.34-1ubuntu1",
"8.0.35-1ubuntu1",
"8.0.35-1ubuntu2",
"8.0.36-1",
"8.0.36-2ubuntu1",
"8.0.36-2ubuntu2",
"8.0.36-2ubuntu3",
"8.0.37-0ubuntu0.24.04.1",
"8.0.39-0ubuntu0.24.04.1",
"8.0.39-0ubuntu0.24.04.2",
"8.0.40-0ubuntu0.24.04.1",
"8.0.41-0ubuntu0.24.04.1",
"8.0.42-0ubuntu0.24.04.1",
"8.0.42-0ubuntu0.24.04.2",
"8.0.43-0ubuntu0.24.04.1",
"8.0.43-0ubuntu0.24.04.2",
"8.0.44-0ubuntu0.24.04.1",
"8.0.44-0ubuntu0.24.04.2",
"8.0.45-0ubuntu0.24.04.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libmysqlclient24",
"binary_version": "8.4.9-0ubuntu0.25.10.1"
},
{
"binary_name": "mysql-client",
"binary_version": "8.4.9-0ubuntu0.25.10.1"
},
{
"binary_name": "mysql-client-core",
"binary_version": "8.4.9-0ubuntu0.25.10.1"
},
{
"binary_name": "mysql-router",
"binary_version": "8.4.9-0ubuntu0.25.10.1"
},
{
"binary_name": "mysql-server",
"binary_version": "8.4.9-0ubuntu0.25.10.1"
},
{
"binary_name": "mysql-server-core",
"binary_version": "8.4.9-0ubuntu0.25.10.1"
},
{
"binary_name": "mysql-source",
"binary_version": "8.4.9-0ubuntu0.25.10.1"
},
{
"binary_name": "mysql-testsuite",
"binary_version": "8.4.9-0ubuntu0.25.10.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "mysql-8.4",
"purl": "pkg:deb/ubuntu/mysql-8.4@8.4.9-0ubuntu0.25.10.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.4.9-0ubuntu0.25.10.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.4.4-0ubuntu2",
"8.4.5-0ubuntu1",
"8.4.5-0ubuntu2",
"8.4.5-0ubuntu3",
"8.4.6-0ubuntu1",
"8.4.6-0ubuntu3",
"8.4.7-0ubuntu0.25.10.2",
"8.4.7-0ubuntu0.25.10.3",
"8.4.8-0ubuntu0.25.10.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libmysqlclient24",
"binary_version": "8.4.9-0ubuntu0.26.04.1"
},
{
"binary_name": "mysql-client",
"binary_version": "8.4.9-0ubuntu0.26.04.1"
},
{
"binary_name": "mysql-client-core",
"binary_version": "8.4.9-0ubuntu0.26.04.1"
},
{
"binary_name": "mysql-router",
"binary_version": "8.4.9-0ubuntu0.26.04.1"
},
{
"binary_name": "mysql-server",
"binary_version": "8.4.9-0ubuntu0.26.04.1"
},
{
"binary_name": "mysql-server-core",
"binary_version": "8.4.9-0ubuntu0.26.04.1"
},
{
"binary_name": "mysql-source",
"binary_version": "8.4.9-0ubuntu0.26.04.1"
},
{
"binary_name": "mysql-testsuite",
"binary_version": "8.4.9-0ubuntu0.26.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "mysql-8.4",
"purl": "pkg:deb/ubuntu/mysql-8.4@8.4.9-0ubuntu0.26.04.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.4.9-0ubuntu0.26.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8.4.6-0ubuntu3",
"8.4.7-0ubuntu2",
"8.4.7-0ubuntu3",
"8.4.8-0ubuntu1"
]
}
],
"aliases": [],
"details": "Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. Easily exploitable vulnerability allows high privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).",
"id": "UBUNTU-CVE-2026-21998",
"modified": "2026-06-03T15:48:25Z",
"published": "2026-04-21T21:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-21998"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-21998"
},
{
"type": "REPORT",
"url": "https://www.oracle.com/security-alerts/cpuapr2026.html#AppendixMSQL"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8363-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8363-2"
}
],
"related": [
"USN-8363-1",
"USN-8363-2"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-21998"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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