CVE-2019-19079: Canonical Ubuntu Linux

High severity, CVSS 7.5. EPSS: 3.3% chance of exploitation in the next 30 days.

A memory leak in the qrtr_tun_write_iter() function in net/qrtr/tun.c in the Linux kernel before 5.3 allows attackers to cause a denial of service (memory consumption), aka CID-a21b7f0cff19.

Affected products

• Canonical Ubuntu Linux: version 18.04 only
• Linux Linux Kernel: from 4.18, before 4.19.89 (fixed in 4.19.89); from 4.20, before 5.3 (fixed in 5.3)

Published 2019-11-18. Last modified 2026-06-17.