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CVE-2021-20219

Medium

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.

SeverityMedium
CVSS5.5
Exploit probability—
ProductLinux Kernel
PublishedMar 23, 2021
First seenMar 23, 2021
Weakness typeCWE-697CWE-697

How to fix

Update
  • linux linux_kernel4.18 or later

Affected products

ProductAffected versionsFixed in
linux linux_kernelv < 4.184.18

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