CVE-2019-18197: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 4.4% chance of exploitation in the next 30 days.

In xsltCopyText in transform.c in libxslt 1.1.33, a pointer variable isn't reset under certain circumstances. If the relevant memory area happened to be freed and reused in a certain way, a bounds check could fail and memory outside a buffer could be written to, or uninitialized data could be disclosed.

Affected products

• Canonical Ubuntu Linux: version 12.04 only; version 14.04 only; version 16.04 only; version 18.04 only; version 19.04 only; version 19.10 only
• Debian Debian Linux: version 8.0 only
• Xmlsoft Libxslt: version 1.1.33 only

Published 2019-10-18. Last modified 2026-06-17.