SB2023062840 - SUSE update for the Linux Kernel (Live Patch 33 for SLE 12 SP4) 

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Main Vulnerability Database SB2023062840

SB2023062840 - SUSE update for the Linux Kernel (Live Patch 33 for SLE 12 SP4)

Published: June 28, 2023 Updated: June 16, 2024

Security Bulletin ID SB2023062840
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

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

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Infinite loop (CVE-ID: CVE-2023-1390)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in tipc_link_xmit() within the Linux kernel TIPC kernel module when parsing UDp packets. A remote attacker can send two small UDP packets to a system with a UDP bearer and consume all available CPU resources.


2) Out-of-bounds write (CVE-ID: CVE-2023-31436)

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

The vulnerability exists due to a boundary error within the qfq_change_class() function in net/sched/sch_qfq.c when handling the MTU value provided to the QFQ Scheduler. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.


Remediation

Install update from vendor's website.

References