CVE-2021-20219

Published: Mar 23, 2021Modified: Jun 17, 2026

5.5

Vector

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

Exploitability: 1.8 / Impact: 3.6

Source: NVD

Description

A denial of service vulnerability was found in n_tty_receive_char_special in drivers/tty/n_tty.c of the Linux kernel. In this flaw a local attacker with a normal user privilege could delay the loop (due to a changing ldata->read_head, and a missing sanity check) and cause a threat to the system availability.

Affected (1)

Products: Linux: Linux Kernel

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Linux Linux Kernel	Before 4.18

Related CWEs

Incorrect Comparison

The product compares two entities in a security-relevant context, but the comparison is incorrect, which may lead to resultant weaknesses.

References (2)

https://bugzilla.redhat.com/show_bug.cgi?id=1923738

Source: secalert@redhat.com

Issue TrackingThird Party Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=1923738

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingThird Party Advisory

Timeline

No history available yet.