PT-2026-3711 · Oracle+4 · Oracle Mysql+4

CVE-2026-21964

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Published

2026-01-20

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Updated

2026-04-01

CVSS v2.0

6.8

Medium

VectorAV:N/AC:L/Au:S/C:N/I:N/A:C
Name of the Vulnerable Software and Affected Versions Oracle MySQL versions 8.0.0 through 8.0.44 Oracle MySQL versions 8.4.0 through 8.4.7 Oracle MySQL versions 9.0.0 through 9.5.0
Description An issue exists in the Server: Thread Pooling component of Oracle MySQL that allows a high-privileged attacker with network access to cause a denial-of-service (complete hang or frequent crash) condition. The issue is easily exploitable via multiple protocols.
Recommendations Update Oracle MySQL to a version later than 8.0.44 Update Oracle MySQL to a version later than 8.4.7 Update Oracle MySQL to a version later than 9.5.0

Exploit

Fix

RCE

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Weakness Enumeration

CWE-20

Related Identifiers

ALSA-2026:4162
ALSA-2026:4828
ALSA-2026:5580
ALSA-2026:5640
ALSA-2026:6391
AZL-74949
AZL-75008
BDU:2026-00699
CVE-2026-21964
OESA-2026-1196
RHSA-2026:4162
RHSA-2026:4828
RHSA-2026:5580
RHSA-2026:5640
RHSA-2026:6391
USN-7994-1
USN-8006-1

Affected Products

Linuxmint
Mysql Server
Oracle Mysql
Rocky Linux
Ubuntu