CVE-2019-19065: Canonical Ubuntu Linux

Medium severity, CVSS 4.7. EPSS: 0.5% chance of exploitation in the next 30 days.

A memory leak in the sdma_init() function in drivers/infiniband/hw/hfi1/sdma.c in the Linux kernel before 5.3.9 allows attackers to cause a denial of service (memory consumption) by triggering rhashtable_init() failures, aka CID-34b3be18a04e. NOTE: This has been disputed as not a vulnerability because "rhashtable_init() can only fail if it is passed invalid values in the second parameter's struct, but when invoked from sdma_init() that is a pointer to a static const struct, so an attacker could only trigger failure if they could corrupt kernel memory (in which case a small memory leak is not a significant problem).

Affected products

• Canonical Ubuntu Linux: version 16.04 only; version 18.04 only; version 19.04 only; version 19.10 only
• Linux Linux Kernel: before 5.3.9 (fixed in 5.3.9)
• Opensuse Leap: version 15.1 only

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