K53092542 : Linux kernel vulnerability CVE-2021-20226

2022-02-0300:00:00

my.f5.com

linux kernel

use-after-free

io_uring

local attacker

privilege escalation

denial of service

data integrity

confidentiality

system availability

AI Score

7.4

Confidence

High

EPSS

0.007

Percentile

81.0%

JSON

Security Advisory Description

A use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability. (CVE-2021-20226)

Impact

There is no impact; F5 products are not affected by this vulnerability.