CVE-2019-19318: Canonical Ubuntu Linux

Medium severity, CVSS 4.4. EPSS: 0.6% chance of exploitation in the next 30 days.

In the Linux kernel 5.3.11, mounting a crafted btrfs image twice can cause an rwsem_down_write_slowpath use-after-free because (in rwsem_can_spin_on_owner in kernel/locking/rwsem.c) rwsem_owner_flags returns an already freed pointer,

Affected products

• Canonical Ubuntu Linux: version 14.04 only; version 16.04 only; version 18.04 only
• Debian Debian Linux: version 9.0 only
• Linux Linux Kernel: version 5.0.21 only; version 5.3.11 only
• Netapp Active Iq Unified Manager: from 9.5
• Netapp Aff a400 Firmware: affected versions not specified
• Netapp Aff a700s Firmware: affected versions not specified
• Netapp Data Availability Services: affected versions not specified
• Netapp FAS8300 Firmware: affected versions not specified
• Netapp FAS8700 Firmware: affected versions not specified
• Netapp h610s Firmware: affected versions not specified
• Netapp Hci Management Node: affected versions not specified
• Netapp Solidfire: affected versions not specified
• Netapp Steelstore Cloud Integrated Storage: affected versions not specified
• Opensuse Leap: version 15.1 only

Published 2019-11-28. Last modified 2026-06-17.