CVE-2020-27784: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

A vulnerability was found in the Linux kernel, where accessing a deallocated instance in printer_ioctl() printer_ioctl() tries to access of a printer_dev instance. However, use-after-free arises because it had been freed by gprinter_free().

Affected products

• Linux Linux Kernel: from 4.1, before 4.4.241 (fixed in 4.4.241); from 4.5, before 4.9.241 (fixed in 4.9.241); from 4.10, before 4.19.154 (fixed in 4.19.154); from 4.20, before 5.4.73 (fixed in 5.4.73); from 5.5, before 5.8.17 (fixed in 5.8.17); from 5.9.0, before 5.9.2 (fixed in 5.9.2)

Published 2022-09-01. Last modified 2026-06-17.