SB2021083119 - Red Hat Enterprise Linux 7.6 update for kernel 

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Main Vulnerability Database SB2021083119

SB2021083119 - Red Hat Enterprise Linux 7.6 update for kernel

Published: August 31, 2021

Security Bulletin ID SB2021083119
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Race condition (CVE-ID: CVE-2021-32399)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a race condition  for removal of the HCI controller within net/bluetooth/hci_request.c in the Linux kernel. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.


2) Use-after-free (CVE-ID: CVE-2020-8648)

The vulnerability allows a local authenticated user to #BASIC_IMPACT#.

There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the n_tty_receive_buf_common function in drivers/tty/n_tty.c.


Remediation

Install update from vendor's website.

References