SB2023022156 - Red Hat Enterprise Linux 8 update for kpatch-patch

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Main Vulnerability Database SB2023022156

SB2023022156 - Red Hat Enterprise Linux 8 update for kpatch-patch

Published: February 21, 2023

Security Bulletin ID SB2023022156
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2022-41222)

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to a use-after-free error caused by a stale TLB in mm/mremap.c, because an rmap lock is not held during a PUD move. A local user can gain access to sensitive information.


2) Buffer overflow (CVE-ID: CVE-2022-43945)

The vulnerability allows a remote attacker to perform a denial of service attacl.

The vulnerability exists due to a boundary error within the Linux kernel NFSD implementation. A remote attacker can send the RPC message over TCP with garbage data added at the end of the message, trigger memory corruption and perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References