CVE-2020-27784

kernel: deallocated instance in printer_ioctl() printer_ioctl() tries to access lock_printer_io of the printer_dev instance

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Severity

Moderate

Red Hat Product Security

5.1

CVSS 3.1

Review impact separately from score.

Published · June 5, 2020

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel. This flaw allows a local user with permission to access a printer port and issue an ioctl, creating a use-after-free and corrupting memory or escalating privileges.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.1
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE-825 · Expired Pointer Dereference