SB2023032736 - Red Hat Enterprise Linux 9 update for kernel-rt

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Main Vulnerability Database SB2023032736

SB2023032736 - Red Hat Enterprise Linux 9 update for kernel-rt

Published: March 27, 2023 Updated: March 30, 2023

Security Bulletin ID SB2023032736
Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

High 33% Low 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Deadlock (CVE-ID: CVE-2022-4269)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an error in the Linux kernel Traffic Control (TC) subsystem. A local user can use a specific network configuration (redirecting egress packets to ingress using TC action "mirred") to trigger a CPU soft lockup.


2) Double Free (CVE-ID: CVE-2022-4744)

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

The vulnerability exists due to a boundary error within the tun_free_netdev() function in the Linux kernel’s TUN/TAP device driver. A local user can trigger a double free error and execute arbitrary code with elevated privileges.



3) Use-after-free (CVE-ID: CVE-2023-0266)

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

The vulnerability exists due to a use-after-free error within the snd_ctl_elem_read() function in the Linux kernel sound subsystem. A local user can trigger a use-after-free error and execute arbitrary code on the system.

Note, the vulnerability is being actively exploited in the wild.


Remediation

Install update from vendor's website.

References