High
Security advisory
mysqld_safe in Oracle MySQL through 5.5.51, 5.6.x through 5.6.32, and 5.7.x through 5.7.14; MariaDB; Percona Server before 5.5.51-38.2, 5.6.x before 5.6.32-78-1, and 5.7.x before 5.7.14-8; and Percona XtraDB Cluster before 5.5.41-37.0, 5.6.x before 5.6.32-25.17, and 5.7.x before 5.7.14-26.17, when using file-based logging, allows local users with access to the mysql account to gain root privileges via a symlink attack on error logs and possibly other files.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2016-6664
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:19 UTC · Revision 1
Source evidence
mysqld_safe in Oracle MySQL through 5.5.51, 5.6.x through 5.6.32, and 5.7.x through 5.7.14; MariaDB; Percona Server before 5.5.51-38.2, 5.6.x before 5.6.32-78-1, and 5.7.x before 5.7.14-8; and Percona XtraDB Cluster before 5.5.41-37.0, 5.6.x before 5.6.32-25.17, and 5.7.x before 5.7.14-26.17, when using file-based logging, allows local users with access to the mysql account to gain root privileges via a symlink attack on error logs and possibly other files.
osv:CVE-2016-6664
Complete source record
{
"id": "1b06be9a20d782214db15693bd012191939e77a06e891a65230fffaf44d92fcc",
"url": "https://osv.dev/vulnerability/CVE-2016-6664",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2016-6664",
"summary": "mysqld_safe in Oracle MySQL through 5.5.51, 5.6.x through 5.6.32, and 5.7.x through 5.7.14; MariaDB; Percona Server before 5.5.51-38.2, 5.6.x before 5.6.32-78-1, and 5.7.x before 5.7.14-8; and Percona XtraDB Cluster before 5.5.41-37.0, 5.6.x before 5.6.32-25.17, and 5.7.x before 5.7.14-26.17, when using file-based logging, allows local users with access to the mysql account to gain root privileges via a symlink attack on error logs and possibly other files.",
"evidence": "osv:CVE-2016-6664",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2016-6664",
"aliases": [
"CVE-2016-6664"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
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"type": "GIT",
"events": [
{
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{
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{
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}
],
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{
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{
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{
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{
"fixed": "10.1.21"
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]
}
}
],
"versions": [
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"mariadb-10.1.19",
"mariadb-10.1.18",
"mariadb-10.1.17",
"mariadb-10.1.16",
"mariadb-10.1.15",
"mariadb-10.1.14",
"mariadb-10.1.13",
"mariadb-10.1.12",
"mariadb-10.1.11",
"mariadb-10.1.10",
"mariadb-10.1.9",
"mariadb-10.1.8",
"mariadb-10.1.7",
"mariadb-10.1.6",
"mariadb-10.1.5",
"mariadb-10.1.4",
"mariadb-10.1.3",
"mariadb-10.1.2",
"mariadb-10.1.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-6664.json",
"vanir_signatures": [
{
"id": "CVE-2016-6664-2235861b",
"digest": {
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"function_hash": "326577626690167958606778565745841641029"
},
"source": "https://github.com/mariadb/server/commit/5fc1ba604e27b7d9eaa2977ef5b0c180f6f62565",
"target": {
"file": "storage/xtradb/handler/ha_innodb.cc",
"function": "wsrep_calc_row_hash"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
},
{
"id": "CVE-2016-6664-76d7bb16",
"digest": {
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"function_hash": "175766638502419520218478376205151830061"
},
"source": "https://github.com/mariadb/server/commit/5fc1ba604e27b7d9eaa2977ef5b0c180f6f62565",
"target": {
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"function": "wsrep_store_key_val_for_row"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
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{
"id": "CVE-2016-6664-d7841ca0",
"digest": {
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"line_hashes": [
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},
"source": "https://github.com/mariadb/server/commit/5fc1ba604e27b7d9eaa2977ef5b0c180f6f62565",
"target": {
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},
"deprecated": false,
"signature_type": "Line",
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],
"vanir_signatures_modified": "2026-10-24T14:12:13Z"
}
},
{
"ranges": [
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"repo": "https://github.com/mysql/mysql-server",
"type": "GIT",
"events": [
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{
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}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.5.0"
},
{
"last_affected": "5.5.51"
}
],
"source": "CPE_RANGE"
},
{
"cpe": "cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "5.6.0"
},
{
"last_affected": "5.6.32"
}
],
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},
{
"cpe": "cpe:2.3:a:oracle:mysql:*:*:*:*:*:*:*:*",
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},
{
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}
],
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}
]
}
}
],
"versions": [
"mysql-5.5.51",
"mysql-5.6.32",
"mysql-5.7.14",
"mysql-5.5.49",
"mysql-5.5.47",
"mysql-5.5.44",
"mysql-5.5.27",
"mysql-5.5.25",
"mysql-5.5.23",
"mysql-5.5.19",
"mysql-5.5.15",
"mysql-5.1.4",
"mysql-4.0.4",
"mysql-4.0.2",
"mysql-3.23.36",
"mysql-3.23.33",
"mysql-3.23.32",
"mysql-3.23.31",
"mysql-3.23.30-gamma",
"mysql-3.23.28-gamma",
"mysql-3.23.22-beta"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-6664.json"
}
},
{
"ranges": [
{
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{
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{
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{
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},
{
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}
],
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{
"cpe": "cpe:2.3:a:percona:percona_server:*:*:*:*:*:*:*:*",
"range": [
{
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},
{
"fixed": "5.5.51-38.2"
}
],
"source": "CPE_RANGE"
},
{
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{
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}
],
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},
{
"cpe": "cpe:2.3:a:percona:percona_server:*:*:*:*:*:*:*:*",
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},
{
"fixed": "5.7.14-8"
}
],
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}
]
}
}
],
"versions": [
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"Percona-Server-5.6.32-78.0",
"Percona-Server-5.5.51-38.1",
"Percona-Server-5.6.22-72.0",
"Percona-Server-5.5.35-33.0",
"Percona-Server-5.6.15-63.0",
"Percona-Server-5.5.34-32.0",
"Percona-Server-5.6.14-62.0",
"pre-null-merge",
"Percona-Server-5.6.5-60.0",
"last-PS-5.5-as-patches",
"clone-5.6.3-m6-build",
"clone-5.6.3-m5-build",
"clone-5.4.0-build",
"mysqlsummit-0.2.1-build",
"mysqlsummit-0.2.1",
"mysqlsummit-0.2.0",
"mysqlsummit-0.2.0-build",
"clone-5.1.31-pv-0.2.0-build",
"mysql-5.1.4",
"clone-5.1.4-build",
"clone-5.1.0-build",
"mysql-4.0.4",
"mysql-4.0.2",
"mysql-3.23.36",
"mysql-3.23.33",
"mysql-3.23.32",
"mysql-3.23.31",
"mysql-3.23.30-gamma",
"mysql-3.23.28-gamma",
"mysql_4.0",
"mysql-3.23.22-beta"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-6664.json"
}
},
{
"ranges": [
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],
"database_specific": {
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{
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{
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}
],
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},
{
"cpe": "cpe:2.3:a:percona:xtradb_cluster:*:*:*:*:*:*:*:*",
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},
{
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],
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}
]
}
}
],
"versions": [
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"Percona-XtraDB-Cluster-5.6.19-25.6",
"Percona-XtraDB-Cluster-5.6.15-25.5",
"Percona-XtraDB-Cluster-5.6.15-25.4",
"Percona-XtraDB-Cluster-5.6.15-25.3",
"Percona-XtraDB-Cluster-5.6.15-25.2",
"Percona-XtraDB-Cluster-5.6.14-25.1",
"pre-null-merge",
"Percona-Server-5.6.5-60.0",
"last-PS-5.5-as-patches"
],
"database_specific": {
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}
}
],
"modified": "2026-10-24T14:12:13.932218230Z",
"provider": "osv",
"references": [
"https://access.redhat.com/errata/RHSA-2017:2192",
"https://access.redhat.com/errata/RHSA-2018:0279",
"https://access.redhat.com/errata/RHSA-2018:0574",
"https://security.gentoo.org/glsa/201702-18",
"https://www.percona.com/blog/2016/11/02/percona-responds-to-cve-2016-6663-and-cve-2016-6664/",
"https://www.exploit-db.com/exploits/40679/"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:a:mariadb:mariadb:*:*:*:*:*:*:*:*"
],
"vendor_product": "mariadb:mariadb",
"extracted_events": [
{
"range": [
{
"introduced": "5.5.0"
},
{
"fixed": "5.5.54"
},
{
"introduced": "10.0.0"
},
{
"fixed": "10.0.29"
},
{
"introduced": "10.1.0"
},
{
"fixed": "10.1.21"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
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],
"vendor_product": "percona:percona_server",
"extracted_events": [
{
"range": [
{
"introduced": "5.5"
},
{
"fixed": "5.5.51-38.2"
},
{
"introduced": "5.6"
},
{
"fixed": "5.6.32-78.1"
},
{
"introduced": "5.7"
},
{
"fixed": "5.7.14-8"
}
],
"source": "CPE_RANGE"
}
]
},
{
"cpes": [
"cpe:2.3:a:percona:xtradb_cluster:*:*:*:*:*:*:*:*"
],
"vendor_product": "percona:xtradb_cluster",
"extracted_events": [
{
"range": [
{
"introduced": "5.5"
},
{
"fixed": "5.5.41-37.0"
}
],
"source": "CPE_RANGE"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2016-6664",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 443370,
"published_at": "2016-12-13T21:59:01.74+00:00"
}