SB20240531153 - Remote code execution in Linux kernel

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Main Vulnerability Database SB20240531153

SB20240531153 - Remote code execution in Linux kernel

Published: May 31, 2024 Updated: May 14, 2025

Security Bulletin ID SB20240531153
Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Use-after-free (CVE-ID: CVE-2021-47103)

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a use-after-free error within the inet6_sk_rx_dst_set(), tcp_v6_do_rcv() and tcp_v6_early_demux() functions in net/ipv6/tcp_ipv6.c, within the udp_sk_rx_dst_set(), __udp4_lib_rcv() and udp_v4_early_demux() functions in net/ipv4/udp.c, within the tcp_v4_do_rcv(), tcp_v4_early_demux(), tcp_prequeue() and inet_sk_rx_dst_set() functions in net/ipv4/tcp_ipv4.c, within the tcp_rcv_established() function in net/ipv4/tcp_input.c, within the tcp_disconnect() function in net/ipv4/tcp.c, within the inet_sock_destruct() function in net/ipv4/af_inet.c. A local user can send specially crafted packets to the system, trigger a use-after-free error and potentially execute arbitrary code.


Remediation

Install update from vendor's website.

References