OESA-2026-4597: perl-DBI security update

The DBI is the standard database interface module for Perl. It defines a set of methods, variables and conventions that provide a consistent database interface independent of the actual database being used. It is important to remember that the DBI is just an interface. The DBI is a layer of "glue" between an application and one or more database driver modules. It is the driver modules which do most of the real work. The DBI provides a standard interface and framework for the drivers to operate within. Security Fix(es):

DBI versions before 1.656 for Perl crash via type confusion in dbiprofile when a database handle is destroyed under a Profile Path with an {attr} element.

An {attr} element names a database handle attribute, which dbiprofile reads from the handle's inner hash. It expects the inner handle as a reference and dereferences it, but a handle that is being destroyed hands back the inner hash itself, so the dereference yields the hash's bucket array. A type check on that pointer usually fails and the call goes unprofiled. When the memory it addresses passes the check, the attribute lookup dereferences a NULL or invalid pointer and the process dies on SIGSEGV.

The Path is set by the application, by the Profile handle attribute, or by the DBIPROFILE environment variable, so DBIPROFILE={ImplementorClass} can crash an unmodified program.(CVE-2026-108518)