CVE-2019-19923 Null dereference in n/a

What is CVE-2019-19923?

CVE-2019-19923 is a high-severity vulnerability in Debian Debian Linux, published on 24 Dec 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

flattenSubquery in select.c in SQLite 3.30.1 mishandles certain uses of SELECT DISTINCT involving a LEFT JOIN in which the right-hand side is a view. This can cause a NULL pointer dereference (or incorrect results).

Weakness: CWE-476

Which versions are affected by CVE-2019-19923?

It affects 11 products.

Products include Debian Debian Linux, Netapp Cloud Backup, Opensuse Backports Sle, Opensuse Leap, Oracle Mysql Workbench, Redhat Enterprise Linux Desktop and 5 more.

How do I fix CVE-2019-19923?

Upgrade to a fixed version.

Is CVE-2019-19923 being exploited?

There is no known exploitation of CVE-2019-19923 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-19923, GHSA-5gmx-grg5-hh7x, UBUNTU-CVE-2019-19923.