Improper Handling of Exceptional Conditions in Linux kernel - CVE-2020-12888

Vulnerability identifier: #VU28159

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-2020-12888

CWE-ID:

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to the VFIO PCI driver mishandles attempts to access disabled memory space. A local user can cause a denial of service condition on the target system.

Linux kernel
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, little endian
Anolis OS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Virtualization Host - Extended Update Support 4.2 for RHEL
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support
Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support
Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support
Ubuntu
Fedora
kernel (Red Hat package)
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kernel-alt (Red Hat package)
linux-image-generic (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-oem (Ubuntu package)
linux-image-virtual-hwe-16.04 (Ubuntu package)
linux-image-4.15.0-118-lowlatency (Ubuntu package)
linux-image-lowlatency-hwe-16.04 (Ubuntu package)
linux-image-generic-lpae-hwe-16.04 (Ubuntu package)
linux-image-generic-hwe-16.04 (Ubuntu package)
linux-image-4.15.0-118-generic-lpae (Ubuntu package)
linux-image-4.15.0-118-generic (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-4.15.0-1054-oracle (Ubuntu package)
linux-image-oracle-lts-18.04 (Ubuntu package)
linux-image-4.15.0-1070-gke (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-gke-4.15 (Ubuntu package)
linux-image-raspi2 (Ubuntu package)
linux-image-4.15.0-1071-raspi2 (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-4.15.0-1075-kvm (Ubuntu package)
linux-image-aws-hwe (Ubuntu package)
linux-image-aws-lts-18.04 (Ubuntu package)
linux-image-4.15.0-1083-aws (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-4.15.0-1084-gcp (Ubuntu package)
linux-image-gcp-lts-18.04 (Ubuntu package)
linux-image-snapdragon (Ubuntu package)
linux-image-4.15.0-1087-snapdragon (Ubuntu package)
linux-image-azure-lts-18.04 (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-azure-edge (Ubuntu package)
linux-image-4.15.0-1096-azure (Ubuntu package)
linux-image-4.15.0-1097-oem (Ubuntu package)
kernel-rt (Red Hat package)
bpftool
kernel-core
kernel-devel
kernel-modules-extra
kernel-tools
kernel-tools-libs
kernel-tools-libs-devel
perf
python3-perf
kernel-modules
kernel-headers
kernel-debug-modules-extra
kernel-debug-modules
kernel-debug-devel
kernel-debug-core
kernel-debug
kernel
python-perf
linux-image-oem-osp1 (Ubuntu package)
linux-image-5.4.0-48-generic (Ubuntu package)
linux-image-5.4.0-48-lowlatency (Ubuntu package)
linux-image-5.4.0-48-generic-lpae (Ubuntu package)
linux-image-lowlatency-hwe-18.04 (Ubuntu package)
linux-image-virtual-hwe-18.04 (Ubuntu package)
linux-image-generic-lpae-hwe-18.04 (Ubuntu package)
linux-image-generic-hwe-18.04 (Ubuntu package)
linux-image-snapdragon-hwe-18.04 (Ubuntu package)
linux-image-5.4.0-1019-raspi (Ubuntu package)
linux-image-raspi-hwe-18.04 (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-5.4.0-1024-kvm (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-5.4.0-1025-oracle (Ubuntu package)
linux-image-5.4.0-1025-gcp (Ubuntu package)
linux-image-5.4.0-1025-aws (Ubuntu package)
linux-image-5.4.0-1026-azure (Ubuntu package)

Install updates from vendor's website.

Linux kernel - update to 5.6.14
kernel (Red Hat package) - addressed in versions 3.10.0-327.89.1.el7, 3.10.0-514.78.1.el7, 3.10.0-693.71.2.el7, 3.10.0-957.56.1.el7, 3.10.0-1062.30.1.el7, 3.10.0-1127.13.1.el7, 4.18.0-80.27.1.el8_0, 4.18.0-147.24.2.el8_1, 4.18.0-193.13.2.el8_2
kernel-alt (Red Hat package) - update to 4.14.0-115.26.1.el7a
linux-image-generic (Ubuntu package) - addressed in versions 4.15.0.118.105, 5.4.0.48.51
linux-image-virtual (Ubuntu package) - addressed in versions 4.15.0.118.105, 5.4.0.48.51
linux-image-lowlatency (Ubuntu package) - addressed in versions 4.15.0.118.105, 5.4.0.48.51
linux-image-generic-lpae (Ubuntu package) - addressed in versions 4.15.0.118.105, 5.4.0.48.51
linux-image-oem (Ubuntu package) - addressed in versions 4.15.0.118.119, 4.15.0.1097.101, 5.4.0.48.51
linux-image-virtual-hwe-16.04 (Ubuntu package) - update to 4.15.0.118.119
linux-image-4.15.0-118-lowlatency (Ubuntu package) - addressed in versions 4.15.0-118.119, 4.15.0-118.119~16.04.1
linux-image-lowlatency-hwe-16.04 (Ubuntu package) - update to 4.15.0.118.119
linux-image-generic-lpae-hwe-16.04 (Ubuntu package) - update to 4.15.0.118.119
linux-image-generic-hwe-16.04 (Ubuntu package) - update to 4.15.0.118.119
linux-image-4.15.0-118-generic-lpae (Ubuntu package) - addressed in versions 4.15.0-118.119, 4.15.0-118.119~16.04.1
linux-image-4.15.0-118-generic (Ubuntu package) - addressed in versions 4.15.0-118.119, 4.15.0-118.119~16.04.1
linux-image-oracle (Ubuntu package) - addressed in versions 4.15.0.1054.44, 5.4.0.1025.9, 5.4.0.1025.22
linux-image-4.15.0-1054-oracle (Ubuntu package) - addressed in versions 4.15.0-1054.58, 4.15.0-1054.58~16.04.1
linux-image-oracle-lts-18.04 (Ubuntu package) - update to 4.15.0.1054.64
linux-image-4.15.0-1070-gke (Ubuntu package) - update to 4.15.0-1070.73
linux-image-gke (Ubuntu package) - addressed in versions 4.15.0.1070.74, 4.15.0.1084.85, 5.4.0.1025.22
linux-image-gke-4.15 (Ubuntu package) - update to 4.15.0.1070.74
linux-image-raspi2 (Ubuntu package) - addressed in versions 4.15.0.1071.68, 5.4.0.1019.54
linux-image-4.15.0-1071-raspi2 (Ubuntu package) - update to 4.15.0-1071.75
linux-image-kvm (Ubuntu package) - addressed in versions 4.15.0.1075.71, 5.4.0.1024.22
linux-image-4.15.0-1075-kvm (Ubuntu package) - update to 4.15.0-1075.76
linux-image-aws-hwe (Ubuntu package) - update to 4.15.0.1083.79
linux-image-aws-lts-18.04 (Ubuntu package) - update to 4.15.0.1083.85
linux-image-4.15.0-1083-aws (Ubuntu package) - addressed in versions 4.15.0-1083.87, 4.15.0-1083.87~16.04.1
linux-image-gcp (Ubuntu package) - addressed in versions 4.15.0.1084.85, 5.4.0.1025.13, 5.4.0.1025.22
linux-image-4.15.0-1084-gcp (Ubuntu package) - addressed in versions 4.15.0-1084.95, 4.15.0-1084.95~16.04.1
linux-image-gcp-lts-18.04 (Ubuntu package) - update to 4.15.0.1084.102
linux-image-snapdragon (Ubuntu package) - update to 4.15.0.1087.90
linux-image-4.15.0-1087-snapdragon (Ubuntu package) - update to 4.15.0-1087.95
linux-image-azure-lts-18.04 (Ubuntu package) - update to 4.15.0.1096.69
linux-image-azure (Ubuntu package) - addressed in versions 4.15.0.1096.72, 4.15.0.1096.90, 5.4.0.1026.9, 5.4.0.1026.25
linux-image-azure-edge (Ubuntu package) - update to 4.15.0.1096.90
linux-image-4.15.0-1096-azure (Ubuntu package) - addressed in versions 4.15.0-1096.106, 4.15.0-1096.106~14.04.1, 4.15.0-1096.106~16.04.1
linux-image-4.15.0-1097-oem (Ubuntu package) - update to 4.15.0-1097.107
kernel-rt (Red Hat package) - update to 4.18.0-193.13.2.rt13.65.el8_2
bpftool - addressed in versions 4.19.91-23.4, 4.19.91-26
kernel-core - update to 4.19.91-23.4
kernel-devel - addressed in versions 4.19.91-23.4, 4.19.91-26
kernel-modules-extra - update to 4.19.91-23.4
kernel-tools - addressed in versions 4.19.91-23.4, 4.19.91-26
kernel-tools-libs - addressed in versions 4.19.91-23.4, 4.19.91-26
kernel-tools-libs-devel - addressed in versions 4.19.91-23.4, 4.19.91-26
perf - addressed in versions 4.19.91-23.4, 4.19.91-26
python3-perf - update to 4.19.91-23.4
kernel-modules - update to 4.19.91-23.4
kernel-headers - addressed in versions 4.19.91-23.4, 4.19.91-26
kernel-debug-modules-extra - update to 4.19.91-23.4
kernel-debug-modules - update to 4.19.91-23.4
kernel-debug-devel - addressed in versions 4.19.91-23.4, 4.19.91-26
kernel-debug-core - update to 4.19.91-23.4
kernel-debug - addressed in versions 4.19.91-23.4, 4.19.91-26
kernel - addressed in versions 4.19.91-23.4, 4.19.91-26
python-perf - update to 4.19.91-26
linux-image-oem-osp1 (Ubuntu package) - update to 5.4.0.48.51
linux-image-5.4.0-48-generic (Ubuntu package) - update to 5.4.0-48.52~18.04.1
linux-image-5.4.0-48-lowlatency (Ubuntu package) - update to 5.4.0-48.52~18.04.1
linux-image-5.4.0-48-generic-lpae (Ubuntu package) - update to 5.4.0-48.52~18.04.1
linux-image-lowlatency-hwe-18.04 (Ubuntu package) - update to 5.4.0.48.52~18.04.42
linux-image-virtual-hwe-18.04 (Ubuntu package) - update to 5.4.0.48.52~18.04.42
linux-image-generic-lpae-hwe-18.04 (Ubuntu package) - update to 5.4.0.48.52~18.04.42
linux-image-generic-hwe-18.04 (Ubuntu package) - update to 5.4.0.48.52~18.04.42
linux-image-snapdragon-hwe-18.04 (Ubuntu package) - update to 5.4.0.48.52~18.04.42
linux-image-5.4.0-1019-raspi (Ubuntu package) - update to 5.4.0-1019.21~18.04.1
linux-image-raspi-hwe-18.04 (Ubuntu package) - update to 5.4.0.1019.23
linux-image-raspi (Ubuntu package) - update to 5.4.0.1019.54
linux-image-5.4.0-1024-kvm (Ubuntu package) - update to 5.4.0-1024.24
linux-image-aws (Ubuntu package) - addressed in versions 5.4.0.1025.10, 5.4.0.1025.26
linux-image-5.4.0-1025-oracle (Ubuntu package) - update to 5.4.0-1025.25~18.04.1
linux-image-5.4.0-1025-gcp (Ubuntu package) - update to 5.4.0-1025.25~18.04.1
linux-image-5.4.0-1025-aws (Ubuntu package) - update to 5.4.0-1025.25~18.04.1
linux-image-5.4.0-1026-azure (Ubuntu package) - update to 5.4.0-1026.26~18.04.1
kernel - addressed in versions 5.6.14-100.fc30, 5.6.14-200.fc31, 5.6.14-300.fc32, 5.6.15-200.fc31

• http://www.openwall.com/lists/oss-security/2020/05/19/6
• https://lore.kernel.org/kvm/158871401328.15589.17598154478222071285.stgit@gimli.home/
• https://lore.kernel.org/kvm/158871570274.15589.10563806532874116326.stgit@gimli.home/

• Multiple vulnerabilities in Linux kernel
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise Linux 7 update for kernel
• Red Hat Enterprise Linux 7.6 Extended Update Support update for kernel
• Red Hat Enterprise Linux 8 update for kernel
• Red Hat Enterprise Linux 8 update for kernel-rt
• Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions update for kernel
• Red Hat Enterprise Linux 8.1 Extended Update Support update for kernel
• Anolis OS update for kernel(ANCK)4.19
• Anolis OS update for kernel(ANCK)4.19
• Ubuntu update for linux
• Ubuntu update for linux
• Red Hat Enterprise Linux 7 update for kernel-alt
• Fedora 32 update for kernel
• Fedora 31 update for kernel
• Fedora 30 update for kernel
• Fedora 31 update for kernel