Threats affecting pkg:deb/ibm/db2

A stack-based buffer overflow vulnerability exists in IBM Db2 versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5. This flaw can be triggered by executing a specially crafted query involving a Materialized Query Table, resulting in a denial of service condition.

CVE-2026-78404 is a local privilege escalation vulnerability in IBM Db2 affecting versions 11.5.0 through 11.5.9 and 12.1.0 through 12.1.5. The issue arises from improper privilege management in the db2pd utility, allowing a local attacker with limited privileges to escalate to higher privileges. The vulnerability has a CVSS 3.1 score of 6.5, indicating a medium severity level. There are no known exploits in the wild and no vendor-provided patch information is currently available.

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a remote authenticated attacker to cause a denial of service due to uncontrolled resource consumption.

IBM Db2 12.1.5 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local attacker to cause a denial of service due to a memory leak.

IBM Db2 12.1.0 through 12.1.4 federated server is vulnerable to a denial of service when running non fenced federated queries.

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a denial of service when a specially crafted query is run with range partitioned tables.

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a denial of service with a specially crafted query when autonomous transactions are enabled.

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 12.1.0 - 12.1.3 could allow a local user to cause a denial of service due to improper neutralization of special elements in data query logic.

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) could allow a user to cause a denial of service due to insufficient validation of special elements in data query logic.

IBM Db2 10.5.0 through 10.5.11, 11.1.0 through 11.1.4.7, 11.5.0 through 11.5.9, and 12.1.0 through 12.1.3 for Linux could allow an authenticated user to regain access after account lockout due to password use after expiration date.

IBM Db2 for Linux 12.1.0, 12.1.1, and 12.1.2 is vulnerable to denial of service with a specially crafted query under certain non-default conditions.

IBM Db2 for Linux 12.1.0, 12.1.1, and 12.1.2 could allow an unauthenticated user to cause a denial of service due to executable segments that are waiting for each other to release a necessary lock.

IBM Db2 for Linux 12.1.0, 12.1.1, and 12.1.2 is vulnerable to a denial of service as the server may crash under certain conditions with a specially crafted query.

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 10.5, 11.1, and 11.5 is vulnerable to a denial of service as the server may crash when using a specially crafted query on certain columnar tables by an authenticated user. IBM X-Force ID: 287613.

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5 is vulnerable to an insecure cryptographic algorithm and to information disclosure in stack trace under exceptional conditions.

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 10.5, 11.1, and 11.5 could allow a user with DATAACCESS privileges to execute routines that they should not have access to. IBM X-Force ID: 260214.