Resource management error in Linux kernel - CVE-2021-4442

Vulnerability identifier: #VU96620

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-4442

CWE-ID: CWE-399

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to resource management error within the do_tcp_setsockopt() function in net/ipv4/tcp.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
IBM Integrated Analytics System
gfs2-kmp-rt
kernel-rt
kernel-rt_debug
kernel-devel-rt
kernel-source-rt
ocfs2-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
kernel-rt-base-debuginfo
kernel-rt-debuginfo
kernel-rt-base
kernel-rt-devel-debuginfo
ocfs2-kmp-rt
gfs2-kmp-rt-debuginfo
dlm-kmp-rt
kernel-rt-devel
kernel-rt_debug-debugsource
cluster-md-kmp-rt
kernel-syms-rt
kernel-rt_debug-debuginfo
kernel-rt_debug-devel-debuginfo
kernel-rt-debugsource
cluster-md-kmp-rt-debuginfo
kernel-rt_debug-devel

Install update from vendor's website.

Linux kernel - addressed in versions 4.19.181, 5.4.106, 5.10.24, 5.11.7, 5.12
IBM Integrated Analytics System - update to 1.0.31.0
gfs2-kmp-rt - update to 4.12.14-10.203.1
kernel-rt - update to 4.12.14-10.203.1
kernel-rt_debug - update to 4.12.14-10.203.1
kernel-devel-rt - update to 4.12.14-10.203.1
kernel-source-rt - update to 4.12.14-10.203.1
ocfs2-kmp-rt-debuginfo - update to 4.12.14-10.203.1
dlm-kmp-rt-debuginfo - update to 4.12.14-10.203.1
kernel-rt-base-debuginfo - update to 4.12.14-10.203.1
kernel-rt-debuginfo - update to 4.12.14-10.203.1
kernel-rt-base - update to 4.12.14-10.203.1
kernel-rt-devel-debuginfo - update to 4.12.14-10.203.1
ocfs2-kmp-rt - update to 4.12.14-10.203.1
gfs2-kmp-rt-debuginfo - update to 4.12.14-10.203.1
dlm-kmp-rt - update to 4.12.14-10.203.1
kernel-rt-devel - update to 4.12.14-10.203.1
kernel-rt_debug-debugsource - update to 4.12.14-10.203.1
cluster-md-kmp-rt - update to 4.12.14-10.203.1
kernel-syms-rt - update to 4.12.14-10.203.1
kernel-rt_debug-debuginfo - update to 4.12.14-10.203.1
kernel-rt_debug-devel-debuginfo - update to 4.12.14-10.203.1
kernel-rt-debugsource - update to 4.12.14-10.203.1
cluster-md-kmp-rt-debuginfo - update to 4.12.14-10.203.1
kernel-rt_debug-devel - update to 4.12.14-10.203.1

• https://git.kernel.org/stable/c/319f460237fc2965a80aa9a055044e1da7b3692a
• https://git.kernel.org/stable/c/3bf899438c123c444f6b644a57784dfbb6b15ad6
• https://git.kernel.org/stable/c/046f3c1c2ff450fb7ae53650e9a95e0074a61f3e
• https://git.kernel.org/stable/c/3b72d5a703842f582502d97906f17d6ee122dac2
• https://git.kernel.org/stable/c/8811f4a9836e31c14ecdf79d9f3cb7c5d463265d
• https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.181
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.24
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12
• https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.106

• Resource management error in Linux kernel ipv4
• SUSE update for the Linux Kernel
• Multiple vulnerabilities in IBM Integrated Analytics System