CVE-2018-20856: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.7% chance of exploitation in the next 30 days.

An issue was discovered in the Linux kernel before 4.18.7. In block/blk-core.c, there is an __blk_drain_queue() use-after-free because a certain error case is mishandled.

Affected products

• Linux Linux Kernel: before 4.18.7 (fixed in 4.18.7)

Published 2019-07-26. Last modified 2026-06-17.