CVE-2019-16921: Linux Kernel

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

In the Linux kernel before 4.17, hns_roce_alloc_ucontext in drivers/infiniband/hw/hns/hns_roce_main.c does not initialize the resp data structure, which might allow attackers to obtain sensitive information from kernel stack memory, aka CID-df7e40425813.

Affected products

• Linux Linux Kernel: before 4.17 (fixed in 4.17)

Published 2019-09-27. Last modified 2026-06-17.