SB2023031436 - Red Hat Enterprise Linux 8.4 Extended Update Support update for kernel-rt

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Main Vulnerability Database SB2023031436

SB2023031436 - Red Hat Enterprise Linux 8.4 Extended Update Support update for kernel-rt

Published: March 14, 2023

Security Bulletin ID SB2023031436
Severity
Low
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Physical access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2022-3564)

The vulnerability allows an attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the l2cap_reassemble_sdu() function in net/bluetooth/l2cap_core.c. An attacker with physical access to device can trigger a use-after-free error and execute arbitrary code on the system.


2) 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.


3) Stack-based buffer overflow (CVE-ID: CVE-2022-4378)

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

The vulnerability exists due to a boundary error within the __do_proc_dointvec() function. A local user can trigger a stack-based buffer overflow and execute arbitrary code with elevated privileges.


Remediation

Install update from vendor's website.

References