Improper Resource Shutdown or Release in Linux kernel - CVE-2021-28714

 

Improper Resource Shutdown or Release in Linux kernel - CVE-2021-28714

Published: May 24, 2022


Vulnerability identifier: #VU63583
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-28714
CWE-ID: CWE-404
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to incoming data packets for a guest in the Linux kernel's netback driver are buffered until the guest is ready to process them. A remote user can use a UDP connection on a fast interface to trigger resource exhaustion and perform a denial of service (DoS) attack.


Affected software

Linux kernel
Amazon Linux AMI
Debian Linux
SUSE MicroOS
Ubuntu
SUSE Linux Enterprise Module for Realtime
SUSE Linux Enterprise Module for Live Patching
SUSE Linux Enterprise Module for Legacy Software
SUSE Linux Enterprise Module for Development Tools
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise Module for Public Cloud
SUSE Linux Enterprise High Availability
SUSE Linux Enterprise Workstation Extension
Fedora
kernel-livepatch-5_3_18-59_40-default
kernel
linux-image-virtual (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-4.15.0-169-generic (Ubuntu package)
linux-image-4.15.0-169-lowlatency (Ubuntu package)
linux-image-4.15.0-169-generic-lpae (Ubuntu package)
linux-image-generic-hwe-16.04 (Ubuntu package)
linux-image-lowlatency-hwe-16.04 (Ubuntu package)
linux-image-virtual-hwe-16.04 (Ubuntu package)
linux-image-dell300x (Ubuntu package)
linux-image-4.15.0-1035-dell300x (Ubuntu package)
linux-image-4.15.0-1087-oracle (Ubuntu package)
linux-image-oracle-lts-18.04 (Ubuntu package)
linux-image-aws-hwe (Ubuntu package)
linux-image-raspi2 (Ubuntu package)
linux-image-4.15.0-1103-raspi2 (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-4.15.0-1107-kvm (Ubuntu package)
linux-image-4.15.0-1116-gcp (Ubuntu package)
linux-image-gcp-lts-18.04 (Ubuntu package)
linux-image-snapdragon (Ubuntu package)
linux-image-4.15.0-1120-snapdragon (Ubuntu package)
linux-image-aws-lts-18.04 (Ubuntu package)
linux-image-azure-lts-18.04 (Ubuntu package)
linux-image-4.15.0-1131-azure (Ubuntu package)
linux (Debian package)
kernel-azure
kernel-source-azure
kernel-devel-azure
kernel-syms-azure
kernel-azure-devel
kernel-azure-debugsource
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
kernel-docs
kernel-preempt-devel-debuginfo
kernel-preempt-devel
kernel-syms
kernel-obs-build-debugsource
kernel-obs-build
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-64kb-devel
kernel-default-livepatch-devel
kernel-default-livepatch
kernel-preempt-extra-debuginfo
kernel-preempt-extra
kernel-preempt-debugsource
kernel-preempt-debuginfo
kernel-default-extra-debuginfo
kernel-default-extra
kernel-default-debugsource
kernel-default-debuginfo
kernel-default
kernel-default-devel
ocfs2-kmp-default-debuginfo
ocfs2-kmp-default
gfs2-kmp-default-debuginfo
gfs2-kmp-default
dlm-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default-debuginfo
cluster-md-kmp-default
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-macros
kernel-source
kernel-default-devel-debuginfo
kernel-preempt
kernel-64kb
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-zfcpdump
kernel-64kb-devel-debuginfo
kernel-devel
kernel-default-base
kernel-syms-rt
ocfs2-kmp-rt
kernel-rt_debug-devel-debuginfo
kernel-rt_debug-devel
kernel-rt_debug-debugsource
kernel-rt_debug-debuginfo
gfs2-kmp-rt
kernel-rt_debug
kernel-rt-devel-debuginfo
kernel-rt-devel
dlm-kmp-rt-debuginfo
dlm-kmp-rt
cluster-md-kmp-rt-debuginfo
cluster-md-kmp-rt
kernel-source-rt
kernel-devel-rt
kernel-rt-debugsource
kernel-rt-debuginfo
kernel-rt
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
linux-image-oem (Ubuntu package)
linux-image-oem-osp1 (Ubuntu package)
linux-image-5.4.0-105-generic (Ubuntu package)
linux-image-5.4.0-105-lowlatency (Ubuntu package)
linux-image-5.4.0-105-generic-lpae (Ubuntu package)
linux-image-lowlatency-hwe-18.04 (Ubuntu package)
linux-image-virtual-hwe-18.04 (Ubuntu package)
linux-image-snapdragon-hwe-18.04 (Ubuntu package)
linux-image-generic-lpae-hwe-18.04 (Ubuntu package)
linux-image-generic-hwe-18.04 (Ubuntu package)
linux-image-ibm-lts-20.04 (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-5.4.0-1018-ibm (Ubuntu package)
linux-image-bluefield (Ubuntu package)
linux-image-5.4.0-1032-bluefield (Ubuntu package)
linux-image-5.4.0-1037-gkeop (Ubuntu package)
linux-image-gkeop-5.4 (Ubuntu package)
linux-image-gkeop (Ubuntu package)
linux-image-raspi-hwe-18.04 (Ubuntu package)
linux-image-5.4.0-1056-raspi (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-5.4.0-1059-kvm (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-5.4.0-1066-gke (Ubuntu package)
linux-image-gke-5.4 (Ubuntu package)
linux-image-oracle-lts-20.04 (Ubuntu package)
linux-image-5.4.0-1067-oracle (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-5.4.0-1068-gcp (Ubuntu package)
linux-image-gcp-lts-20.04 (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-aws-lts-20.04 (Ubuntu package)
linux-image-5.4.0-1069-aws (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-azure-lts-20.04 (Ubuntu package)
linux-image-5.4.0-1073-azure (Ubuntu package)
linux-image-5.13.0-37-generic-lpae (Ubuntu package)
linux-image-5.13.0-37-generic-64k (Ubuntu package)
linux-image-5.13.0-37-lowlatency (Ubuntu package)
linux-image-5.13.0-37-generic (Ubuntu package)
linux-image-generic-64k-hwe-20.04 (Ubuntu package)
linux-image-generic-lpae-hwe-20.04 (Ubuntu package)
linux-image-generic-hwe-20.04 (Ubuntu package)
linux-image-lowlatency-hwe-20.04 (Ubuntu package)
linux-image-virtual-hwe-20.04 (Ubuntu package)
linux-image-oem-20.04 (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-5.13.0-1018-kvm (Ubuntu package)
linux-image-5.13.0-1019-aws (Ubuntu package)
linux-image-5.13.0-1021-azure (Ubuntu package)
linux-image-5.13.0-1021-gcp (Ubuntu package)
linux-image-5.13.0-1022-raspi (Ubuntu package)
linux-image-5.13.0-1022-raspi-nolpae (Ubuntu package)
linux-image-raspi-nolpae (Ubuntu package)
linux-image-5.13.0-1023-oracle (Ubuntu package)
linux-image-5.13.0-1025-oracle (Ubuntu package)
linux-image-oem-20.04d (Ubuntu package)
linux-image-5.14.0-1022-oem (Ubuntu package)

How to mitigate CVE-2021-28714

Install updates from vendor's website.

Linux kernel - update to 5.15.0
kernel-livepatch-5_3_18-59_40-default - update to 1-7.3.1
kernel - addressed in versions 4.14.262-135.486, 4.14.262-135.489
linux-image-virtual (Ubuntu package) - addressed in versions 4.15.0.169.158, 5.4.0.105.109, 5.13.0.37.46
linux-image-generic (Ubuntu package) - addressed in versions 4.15.0.169.158, 5.4.0.105.109, 5.13.0.37.46
linux-image-lowlatency (Ubuntu package) - addressed in versions 4.15.0.169.158, 5.4.0.105.109, 5.13.0.37.46
linux-image-generic-lpae (Ubuntu package) - addressed in versions 4.15.0.169.158, 5.4.0.105.109, 5.13.0.37.46
linux-image-4.15.0-169-generic (Ubuntu package) - update to 4.15.0-169.177
linux-image-4.15.0-169-lowlatency (Ubuntu package) - update to 4.15.0-169.177
linux-image-4.15.0-169-generic-lpae (Ubuntu package) - update to 4.15.0-169.177
linux-image-generic-hwe-16.04 (Ubuntu package) - update to 4.15.0.187.173
linux-image-lowlatency-hwe-16.04 (Ubuntu package) - update to 4.15.0.187.173
linux-image-virtual-hwe-16.04 (Ubuntu package) - update to 4.15.0.187.173
linux-image-dell300x (Ubuntu package) - update to 4.15.0.1035.37
linux-image-4.15.0-1035-dell300x (Ubuntu package) - update to 4.15.0-1035.40
linux-image-4.15.0-1087-oracle (Ubuntu package) - update to 4.15.0-1087.95
linux-image-oracle-lts-18.04 (Ubuntu package) - update to 4.15.0.1087.97
linux-image-aws-hwe (Ubuntu package) - update to 4.15.0.1099.92
linux-image-raspi2 (Ubuntu package) - addressed in versions 4.15.0.1103.101, 5.4.0.1056.90
linux-image-4.15.0-1103-raspi2 (Ubuntu package) - update to 4.15.0-1103.110
linux-image-kvm (Ubuntu package) - addressed in versions 4.15.0.1107.103, 5.4.0.1059.58, 5.13.0.1018.18
linux-image-4.15.0-1107-kvm (Ubuntu package) - update to 4.15.0-1107.109
linux-image-4.15.0-1116-gcp (Ubuntu package) - update to 4.15.0-1116.130
linux-image-gcp-lts-18.04 (Ubuntu package) - update to 4.15.0.1116.135
linux-image-snapdragon (Ubuntu package) - update to 4.15.0.1120.123
linux-image-4.15.0-1120-snapdragon (Ubuntu package) - update to 4.15.0-1120.129
linux-image-aws-lts-18.04 (Ubuntu package) - update to 4.15.0.1121.124
linux-image-azure-lts-18.04 (Ubuntu package) - update to 4.15.0.1131.104
linux-image-4.15.0-1131-azure (Ubuntu package) - update to 4.15.0-1131.144
linux (Debian package) - addressed in versions 4.19.232-1, 5.10.92-1
kernel-azure - update to 5.3.18-38.34.1
kernel-source-azure - update to 5.3.18-38.34.1
kernel-devel-azure - update to 5.3.18-38.34.1
kernel-syms-azure - update to 5.3.18-38.34.1
kernel-azure-devel - update to 5.3.18-38.34.1
kernel-azure-debugsource - update to 5.3.18-38.34.1
kernel-azure-debuginfo - update to 5.3.18-38.34.1
kernel-azure-devel-debuginfo - update to 5.3.18-38.34.1
kernel-docs - update to 5.3.18-59.40.1
kernel-preempt-devel-debuginfo - update to 5.3.18-59.40.1
kernel-preempt-devel - update to 5.3.18-59.40.1
kernel-syms - update to 5.3.18-59.40.1
kernel-obs-build-debugsource - update to 5.3.18-59.40.1
kernel-obs-build - update to 5.3.18-59.40.1
reiserfs-kmp-default-debuginfo - update to 5.3.18-59.40.1
reiserfs-kmp-default - update to 5.3.18-59.40.1
kernel-64kb-devel - update to 5.3.18-59.40.1
kernel-default-livepatch-devel - update to 5.3.18-59.40.1
kernel-default-livepatch - update to 5.3.18-59.40.1
kernel-preempt-extra-debuginfo - update to 5.3.18-59.40.1
kernel-preempt-extra - update to 5.3.18-59.40.1
kernel-preempt-debugsource - update to 5.3.18-59.40.1
kernel-preempt-debuginfo - update to 5.3.18-59.40.1
kernel-default-extra-debuginfo - update to 5.3.18-59.40.1
kernel-default-extra - update to 5.3.18-59.40.1
kernel-default-debugsource - update to 5.3.18-59.40.1
kernel-default-debuginfo - update to 5.3.18-59.40.1
kernel-default - update to 5.3.18-59.40.1
kernel-default-devel - update to 5.3.18-59.40.1
ocfs2-kmp-default-debuginfo - update to 5.3.18-59.40.1
ocfs2-kmp-default - update to 5.3.18-59.40.1
gfs2-kmp-default-debuginfo - update to 5.3.18-59.40.1
gfs2-kmp-default - update to 5.3.18-59.40.1
dlm-kmp-default-debuginfo - update to 5.3.18-59.40.1
dlm-kmp-default - update to 5.3.18-59.40.1
cluster-md-kmp-default-debuginfo - update to 5.3.18-59.40.1
cluster-md-kmp-default - update to 5.3.18-59.40.1
kernel-zfcpdump-debugsource - update to 5.3.18-59.40.1
kernel-zfcpdump-debuginfo - update to 5.3.18-59.40.1
kernel-macros - update to 5.3.18-59.40.1
kernel-source - update to 5.3.18-59.40.1
kernel-default-devel-debuginfo - update to 5.3.18-59.40.1
kernel-preempt - update to 5.3.18-59.40.1
kernel-64kb - update to 5.3.18-59.40.1
kernel-64kb-debuginfo - update to 5.3.18-59.40.1
kernel-64kb-debugsource - update to 5.3.18-59.40.1
kernel-zfcpdump - update to 5.3.18-59.40.1
kernel-64kb-devel-debuginfo - update to 5.3.18-59.40.1
kernel-devel - update to 5.3.18-59.40.1
kernel-default-base - update to 5.3.18-59.40.1.18.25.1
kernel-syms-rt - addressed in versions 5.3.18-65.1, 5.3.18-68.1
ocfs2-kmp-rt - addressed in versions 5.3.18-65.2, 5.3.18-68.1
kernel-rt_debug-devel-debuginfo - addressed in versions 5.3.18-65.2, 5.3.18-68.1
kernel-rt_debug-devel - addressed in versions 5.3.18-65.2, 5.3.18-68.1
kernel-rt_debug-debugsource - addressed in versions 5.3.18-65.2, 5.3.18-68.1
kernel-rt_debug-debuginfo - addressed in versions 5.3.18-65.2, 5.3.18-68.1
gfs2-kmp-rt - addressed in versions 5.3.18-65.2, 5.3.18-68.1
kernel-rt_debug - update to 5.3.18-65.2
kernel-rt-devel-debuginfo - addressed in versions 5.3.18-65.2, 5.3.18-68.1
kernel-rt-devel - addressed in versions 5.3.18-65.2, 5.3.18-68.1
dlm-kmp-rt-debuginfo - addressed in versions 5.3.18-65.2, 5.3.18-68.1
dlm-kmp-rt - addressed in versions 5.3.18-65.2, 5.3.18-68.1
cluster-md-kmp-rt-debuginfo - addressed in versions 5.3.18-65.2, 5.3.18-68.1
cluster-md-kmp-rt - addressed in versions 5.3.18-65.2, 5.3.18-68.1
kernel-source-rt - addressed in versions 5.3.18-65.2, 5.3.18-68.1
kernel-devel-rt - addressed in versions 5.3.18-65.2, 5.3.18-68.1
kernel-rt-debugsource - addressed in versions 5.3.18-65.2, 5.3.18-68.1
kernel-rt-debuginfo - addressed in versions 5.3.18-65.2, 5.3.18-68.1
kernel-rt - addressed in versions 5.3.18-65.2, 5.3.18-68.1
gfs2-kmp-rt-debuginfo - addressed in versions 5.3.18-65.2, 5.3.18-68.1
ocfs2-kmp-rt-debuginfo - addressed in versions 5.3.18-65.2, 5.3.18-68.1
linux-image-oem (Ubuntu package) - addressed in versions 5.4.0.100.104, 5.4.0.105.109, 5.4.0.105.119~18.04.90
linux-image-oem-osp1 (Ubuntu package) - addressed in versions 5.4.0.105.109, 5.4.0.105.119~18.04.90
linux-image-5.4.0-105-generic (Ubuntu package) - addressed in versions 5.4.0-105.119, 5.4.0-105.119~18.04.1
linux-image-5.4.0-105-lowlatency (Ubuntu package) - addressed in versions 5.4.0-105.119, 5.4.0-105.119~18.04.1
linux-image-5.4.0-105-generic-lpae (Ubuntu package) - addressed in versions 5.4.0-105.119, 5.4.0-105.119~18.04.1
linux-image-lowlatency-hwe-18.04 (Ubuntu package) - update to 5.4.0.105.119~18.04.90
linux-image-virtual-hwe-18.04 (Ubuntu package) - update to 5.4.0.105.119~18.04.90
linux-image-snapdragon-hwe-18.04 (Ubuntu package) - update to 5.4.0.105.119~18.04.90
linux-image-generic-lpae-hwe-18.04 (Ubuntu package) - update to 5.4.0.105.119~18.04.90
linux-image-generic-hwe-18.04 (Ubuntu package) - update to 5.4.0.105.119~18.04.90
linux-image-ibm-lts-20.04 (Ubuntu package) - update to 5.4.0.1018.18
linux-image-ibm (Ubuntu package) - addressed in versions 5.4.0.1018.18, 5.4.0.1018.35
linux-image-5.4.0-1018-ibm (Ubuntu package) - addressed in versions 5.4.0-1018.20, 5.4.0-1018.20~18.04.1
linux-image-bluefield (Ubuntu package) - update to 5.4.0.1032.33
linux-image-5.4.0-1032-bluefield (Ubuntu package) - update to 5.4.0-1032.35
linux-image-5.4.0-1037-gkeop (Ubuntu package) - addressed in versions 5.4.0-1037.38, 5.4.0-1037.38~18.04.1
linux-image-gkeop-5.4 (Ubuntu package) - addressed in versions 5.4.0.1037.38~18.04.37, 5.4.0.1037.40
linux-image-gkeop (Ubuntu package) - update to 5.4.0.1037.40
linux-image-raspi-hwe-18.04 (Ubuntu package) - update to 5.4.0.1056.58
linux-image-5.4.0-1056-raspi (Ubuntu package) - addressed in versions 5.4.0-1056.63, 5.4.0-1056.63~18.04.1
linux-image-raspi (Ubuntu package) - addressed in versions 5.4.0.1056.90, 5.13.0.1022.27
linux-image-5.4.0-1059-kvm (Ubuntu package) - update to 5.4.0-1059.62
linux-image-gke (Ubuntu package) - addressed in versions 5.4.0.1062.72, 5.4.0.1066.76, 5.13.0.1021.19
linux-image-5.4.0-1066-gke (Ubuntu package) - addressed in versions 5.4.0-1066.69, 5.4.0-1066.69~18.04.1
linux-image-gke-5.4 (Ubuntu package) - addressed in versions 5.4.0.1066.69~18.04.30, 5.4.0.1066.76
linux-image-oracle-lts-20.04 (Ubuntu package) - update to 5.4.0.1067.67
linux-image-5.4.0-1067-oracle (Ubuntu package) - addressed in versions 5.4.0-1067.72, 5.4.0-1067.72~18.04.1
linux-image-oracle (Ubuntu package) - addressed in versions 5.4.0.1067.72~18.04.46, 5.11.0.1028.31~20.04.20, 5.13.0.1023.23, 5.13.0.1025.30~20.04.1
linux-image-gcp (Ubuntu package) - addressed in versions 5.4.0.1068.53, 5.11.0.1029.33~20.04.27, 5.13.0.1021.19, 5.13.0.1021.25~20.04.1
linux-image-5.4.0-1068-gcp (Ubuntu package) - addressed in versions 5.4.0-1068.72, 5.4.0-1068.72~18.04.1
linux-image-gcp-lts-20.04 (Ubuntu package) - update to 5.4.0.1068.77
linux-image-aws (Ubuntu package) - addressed in versions 5.4.0.1069.51, 5.13.0.1019.20, 5.13.0.1019.21~20.04.12
linux-image-aws-lts-20.04 (Ubuntu package) - update to 5.4.0.1069.71
linux-image-5.4.0-1069-aws (Ubuntu package) - addressed in versions 5.4.0-1069.73, 5.4.0-1069.73~18.04.1
linux-image-azure (Ubuntu package) - addressed in versions 5.4.0.1073.52, 5.11.0.1028.31~20.04.26, 5.13.0.1021.24~20.04.10
linux-image-azure-lts-20.04 (Ubuntu package) - update to 5.4.0.1073.71
linux-image-5.4.0-1073-azure (Ubuntu package) - addressed in versions 5.4.0-1073.76, 5.4.0-1073.76~18.04.1
linux-image-5.13.0-37-generic-lpae (Ubuntu package) - addressed in versions 5.13.0-37.42, 5.13.0-37.42~20.04.1
linux-image-5.13.0-37-generic-64k (Ubuntu package) - addressed in versions 5.13.0-37.42, 5.13.0-37.42~20.04.1
linux-image-5.13.0-37-lowlatency (Ubuntu package) - addressed in versions 5.13.0-37.42, 5.13.0-37.42~20.04.1
linux-image-5.13.0-37-generic (Ubuntu package) - addressed in versions 5.13.0-37.42, 5.13.0-37.42~20.04.1
linux-image-generic-64k-hwe-20.04 (Ubuntu package) - update to 5.13.0.37.42~20.04.22
linux-image-generic-lpae-hwe-20.04 (Ubuntu package) - update to 5.13.0.37.42~20.04.22
linux-image-generic-hwe-20.04 (Ubuntu package) - update to 5.13.0.37.42~20.04.22
linux-image-lowlatency-hwe-20.04 (Ubuntu package) - update to 5.13.0.37.42~20.04.22
linux-image-virtual-hwe-20.04 (Ubuntu package) - update to 5.13.0.37.42~20.04.22
linux-image-oem-20.04 (Ubuntu package) - update to 5.13.0.37.46
linux-image-generic-64k (Ubuntu package) - update to 5.13.0.37.46
linux-image-5.13.0-1018-kvm (Ubuntu package) - update to 5.13.0-1018.19
linux-image-5.13.0-1019-aws (Ubuntu package) - addressed in versions 5.13.0-1019.21, 5.13.0-1019.21~20.04.1
linux-image-5.13.0-1021-azure (Ubuntu package) - update to 5.13.0-1021.24~20.04.1
linux-image-5.13.0-1021-gcp (Ubuntu package) - addressed in versions 5.13.0-1021.25, 5.13.0-1021.25~20.04.1
linux-image-5.13.0-1022-raspi (Ubuntu package) - update to 5.13.0-1022.24
linux-image-5.13.0-1022-raspi-nolpae (Ubuntu package) - update to 5.13.0-1022.24
linux-image-raspi-nolpae (Ubuntu package) - update to 5.13.0.1022.27
linux-image-5.13.0-1023-oracle (Ubuntu package) - update to 5.13.0-1023.28
linux-image-5.13.0-1025-oracle (Ubuntu package) - update to 5.13.0-1025.30~20.04.1
linux-image-oem-20.04d (Ubuntu package) - update to 5.14.0.1022.19
linux-image-5.14.0-1022-oem (Ubuntu package) - update to 5.14.0-1022.24
kernel - addressed in versions 5.15.11-100.fc34, 5.15.11-200.fc35

External References

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