Description
Vulnerability in the MySQL Server component of Oracle MySQL (subcomponent: Server: Thread Pooling). Supported versions that are affected are 5.5.54 and earlier, 5.6.35 and earlier and 5.7.17 and earlier. Easily "exploitable" vulnerability allows unauthenticated 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 3.0 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Oracle | MySQL Server | 5.5.54 and earlier, 5.6.35 and earlier, 5.7.17 and earlier | — |
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 8 | mysql-5.5 | 5.5.55-0+deb8u1 | DSA-3834-1 |
| Debian 7 | mysql-5.5 | 5.5.55-0+deb7u1 | DLA-916-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | mysql-5.7 | 5.7.18-0ubuntu0.16.04.1 | USN-3269-1 |
| Ubuntu 16.04 LTS | percona-server-5.6 +1 | No fix yet | — |
| Ubuntu 14.04 LTS | mysql-5.5 | 5.5.55-0ubuntu0.14.04.1 | USN-3269-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP4 | mysql | 5.5.55-0.38.1 | SUSE-SU-2017:1137-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | mysql | 5.5.55-0.38.1 | SUSE-SU-2017:1137-1 |
Advisories 4
- USN-3269-1 mysql-5.5, mysql-5.7 vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-916-1 mysql-5.5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3834-1 mysql-5.5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2017:1137-1 Security update for mysql SUSE / openSUSE Security Updates · Feb 4, 2026
References
- 1038287 vdb-entry
- http://www.oracle.com/technetwork/security-advisory/cpuapr2017-3236618.html
- DSA-3834 vendor-advisory
- 97763 vdb-entry