The Out-of-Bounds Access to ha_alter_info->key_info_buffer Causes Instance Crash
Last updated:2026-03-11 09:45:23
The Out-of-Bounds Access to ha_alter_info->key_info_buffer Causes Instance Crash
Last updated: 2026-03-11 09:45:23
Issue
Concurrent execution of DDL statements and repeated INSERT operations result in out-of-bounds access to ha_alter_info->key_info_buffer, causing an instance Crash.
Issue Triggering Scenarios
Rebuilding tables without primary keys may trigger out-of-bounds access to key_info_buffer when a duplicate row is inserted, causing an instance Crash.
Affected Kernel Versions
MySQL 5.6 versions 20210630 and later.
MySQL 5.7 versions 20211102 and earlier.
Fixed Kernel Version
MySQL 5.7 20240331.
Fixing Methods
1. To upgrade the kernel version to MySQL 5.7 20240331, see Upgrading Kernel Minor Version and Upgrading the database version of MySQL 5.6 for instructions.
2. Alternatively, you can add a primary key to a table without one. For the operation, see The primary and secondary instances have inconsistent query data.
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