Description
Double-free vulnerability in mysqld for MySQL before 3.23.55 allows attackers with MySQL access to cause a denial of service (crash) via mysql_change_user.
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 3.0 | mysql | 3.23.49-8.4 | DSA-303 |
Advisories 1
- DSA-303 mysql - privilege escalation Debian Security (DSA / DLA) · Mar 9, 2026
References
- CLA-2003:743 vendor-advisory
- DSA-303 vendor-advisory
- RHSA-2003:093 vendor-advisory
- http://www.mysql.com/doc/en/News-3.23.55.html
- RHSA-2003:166 vendor-advisory
- RHSA-2003:094 vendor-advisory
- mysql-mysqlchangeuser-doublefree-dos(11199) vdb-entry
- MDKSA-2003:013 vendor-advisory
- ESA-20030220-004 vendor-advisory
- oval:org.mitre.oval:def:436 vdb-entry signature
- 20030129 [OpenPKG-SA-2003.008] OpenPKG Security Advisory (mysql) mailing-list
- 6718 vdb-entry