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CVE-2016-6663· NVD / CVE Program· CNA mitre

Race condition in Oracle MySQL before 5.5.52, 5.6.x before 5.6.33, 5.7.x before 5.7.15, and 8.x before 8.0.1; MariaDB before 5.5.52, 10.0.x

Race condition in Oracle MySQL before 5.5.52, 5.6.x before 5.6.33, 5.7.x before 5.7.15, and 8.x before 8.0.1; MariaDB before 5.5.52, 10.0.x before 10.0.28, and 10.1.x before 10.1.18; 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 allows local users with certain permissions to gain privileges by leveraging use of my_copystat by REPAIR TABLE to repair a MyISAM table.

HighCVSS 7.0 · v3.0—Proof of concept Fix available
Published
Dec 13, 2016
Updated
Jun 16, 2026
EPSS
4.3% · 91th percentile
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Report tools

JSON

Action score

29

Monitor

Low priority for now.

CVSS
28 / 40 · 7.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 4.3%

Affected systems

VendorProduct
oraclemysql
perconapercona server
perconaxtradb cluster
mariadbmariadb

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Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • oracle mysql5.5.0 and later · up to 5.5.52 inclusive
  • oracle mysql5.6.0 and later · up to 5.6.33 inclusive
  • oracle mysql5.7.0 and later · up to 5.7.15 inclusive
  • oracle mysql8.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:8mariadb-10.0before 10.0.28-0+deb8u110.0.28-0+deb8u1
Red Hat:enterprise_linux:6::clientmysqlbefore 0:5.1.73-8.el6_80:5.1.73-8.el6_8
Red Hat:enterprise_linux:6::clientmysql-benchbefore 0:5.1.73-8.el6_80:5.1.73-8.el6_8
Red Hat:enterprise_linux:6::clientmysql-debuginfobefore 0:5.1.73-8.el6_80:5.1.73-8.el6_8
Red Hat:enterprise_linux:6::clientmysql-develbefore 0:5.1.73-8.el6_80:5.1.73-8.el6_8
Red Hat:enterprise_linux:6::clientmysql-embeddedbefore 0:5.1.73-8.el6_80:5.1.73-8.el6_8
Red Hat:enterprise_linux:6::clientmysql-embedded-develbefore 0:5.1.73-8.el6_80:5.1.73-8.el6_8
Red Hat:enterprise_linux:6::clientmysql-libsbefore 0:5.1.73-8.el6_80:5.1.73-8.el6_8
Red Hat:enterprise_linux:6::clientmysql-serverbefore 0:5.1.73-8.el6_80:5.1.73-8.el6_8
Red Hat:enterprise_linux:6::clientmysql-testbefore 0:5.1.73-8.el6_80:5.1.73-8.el6_8
Red Hat:enterprise_linux:7::clientmariadbbefore 1:5.5.52-1.el71:5.5.52-1.el7
Red Hat:enterprise_linux:7::clientmariadb-benchbefore 1:5.5.52-1.el71:5.5.52-1.el7
Red Hat:enterprise_linux:7::clientmariadb-debuginfobefore 1:5.5.52-1.el71:5.5.52-1.el7
Red Hat:enterprise_linux:7::clientmariadb-develbefore 1:5.5.52-1.el71:5.5.52-1.el7
Red Hat:enterprise_linux:7::clientmariadb-embeddedbefore 1:5.5.52-1.el71:5.5.52-1.el7
Red Hat:enterprise_linux:7::clientmariadb-embedded-develbefore 1:5.5.52-1.el71:5.5.52-1.el7
Red Hat:enterprise_linux:7::clientmariadb-libsbefore 1:5.5.52-1.el71:5.5.52-1.el7
Red Hat:enterprise_linux:7::clientmariadb-serverbefore 1:5.5.52-1.el71:5.5.52-1.el7
Red Hat:enterprise_linux:7::clientmariadb-testbefore 1:5.5.52-1.el71:5.5.52-1.el7
Red Hat:rhel_software_collections:2::el6mariadb55-mariadbbefore 0:5.5.53-1.el60:5.5.53-1.el6
Red Hat:rhel_software_collections:2::el6mariadb55-mariadb-benchbefore 0:5.5.53-1.el60:5.5.53-1.el6
Red Hat:rhel_software_collections:2::el6mariadb55-mariadb-debuginfobefore 0:5.5.53-1.el60:5.5.53-1.el6
Red Hat:rhel_software_collections:2::el6mariadb55-mariadb-develbefore 0:5.5.53-1.el60:5.5.53-1.el6
Red Hat:rhel_software_collections:2::el6mariadb55-mariadb-libsbefore 0:5.5.53-1.el60:5.5.53-1.el6

+85

Other highest-scoring records for the same primary product.

  • CVE-2016-6662Oracle MySQL through 5.5.52, 5.6.x through 5.6.33, and 5.7.x through 5.7.15; MariaDB before 5.5.51, 10.0.x before 10.0.27, and 10.1.x before
    59Plan
  • CVE-2017-3599Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Pluggable Auth).
    57Plan
  • CVE-2009-4484Multiple stack-based buffer overflows in the CertDecoder::GetName function in src/asn.cpp in TaoCrypt in yaSSL before 1.9.9, as used in mysq
    51Plan
  • CVE-2022-21489Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Cluster: General).
    49Plan
  • CVE-2022-21279Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Cluster: General).
    49Plan
  • CVE-2012-2122sql/password.c in Oracle MySQL 5.1.x before 5.1.63, 5.5.x before 5.5.24, and 5.6.x before 5.6.6, and MariaDB 5.1.x before 5.1.62, 5.2.x befo
    49Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:mariadb-10.010.0.28-0+deb8u1 · Debian:8Package registry (OSV)
red hat:mariadb55-mariadb0:5.5.53-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
red hat:mariadb55-mariadb-bench0:5.5.53-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
red hat:mariadb55-mariadb-debuginfo0:5.5.53-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
red hat:mariadb55-mariadb-devel0:5.5.53-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
red hat:mariadb55-mariadb-libs0:5.5.53-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
red hat:mysql55-mysql0:5.5.52-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
red hat:mysql55-mysql-bench0:5.5.52-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
red hat:mysql55-mysql-debuginfo0:5.5.52-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
red hat:mysql55-mysql-devel0:5.5.52-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
red hat:mysql55-mysql-libs0:5.5.52-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
red hat:mysql55-mysql-server0:5.5.52-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
red hat:mysql55-mysql-test0:5.5.52-1.el6 · Red Hat:rhel_software_collections:2::el6Package registry (OSV)
suse:mariadb10.0.28-20.16.2 · SUSE:Linux Enterprise Server for SAP Applications 12Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1
  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrylocal2016-11-01
Proof-of-concept repository on GitHubstars:52016-11-02

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. First PoC-43 d
  2. Published
  3. TodaySep 30, 2026+3578 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

CVSS vector

CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

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References

All records