SB2021101274 - SUSE update for the Linux Kernel (Live Patch 21 for SLE 12 SP5) 

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2021101274

SB2021101274 - SUSE update for the Linux Kernel (Live Patch 21 for SLE 12 SP5)

Published: October 12, 2021

Security Bulletin ID SB2021101274
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2021-3573)

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

The vulnerability exists due to a use-after-free in hci_sock_bound_ioctl() function of the Linux kernel HCI subsystem triggers race condition of the call hci_unregister_dev() together with one of the calls hci_sock_blacklist_add(), hci_sock_blacklist_del(), hci_get_conn_info(), hci_get_auth_info(). A privileged local user can use this flaw to crash the system or escalate privileges on the system.


2) Use-after-free (CVE-ID: CVE-2021-3640)

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

The vulnerability exists due to a use-after-free error in sco_sock_sendmsg() function of the Linux kernel HCI subsystem. A privileged local user can call ioct UFFDIO_REGISTER or other way trigger race condition to escalate privileges on the system.


Remediation

Install update from vendor's website.

References