Out-of-bounds read in Linux kernel - CVE-2021-45402

 

Out-of-bounds read in Linux kernel - CVE-2021-45402

Published: May 24, 2022 / Updated: May 24, 2022


Vulnerability identifier: #VU63567
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-45402
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to check_alu_op() function in kernel/bpf/verifier.c does not properly update bounds while handling the mov32 instruction. A local user can obtain potentially sensitive address information.


Affected software

Linux kernel
SUSE Manager Server
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Linux Enterprise Micro
Anolis OS
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP Applications
SUSE Linux Enterprise Module for Public Cloud
SUSE Linux Enterprise Real Time
SUSE Linux Enterprise Module for Realtime
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Legacy Software
SUSE Linux Enterprise Workstation Extension
SUSE Linux Enterprise Module for Live Patching
SUSE Linux Enterprise Module for Development Tools
SUSE Linux Enterprise Module for Basesystem
SUSE Linux Enterprise High Availability
SUSE Linux Enterprise Desktop
openSUSE Leap
Ubuntu
kernel-livepatch-5_14_21-150400_24_11-default-debuginfo
kernel-livepatch-SLE15-SP4_Update_1-debugsource
kernel-livepatch-5_14_21-150400_24_11-default
kernel-devel
bpftool
kernel
kernel-core
kernel-debug
kernel-debug-core
kernel-debug-devel
kernel-debug-modules
kernel-debug-modules-extra
kernel-headers
kernel-modules
kernel-modules-extra
kernel-modules-internal
kernel-tools
kernel-tools-libs
kernel-tools-libs-devel
perf
python3-perf
cluster-md-kmp-azure-debuginfo
kernel-source-azure
cluster-md-kmp-azure
kernel-azure-extra
kernel-devel-azure
kernel-azure-devel
kernel-azure-devel-debuginfo
kernel-azure-livepatch-devel
dlm-kmp-azure
dlm-kmp-azure-debuginfo
gfs2-kmp-azure
gfs2-kmp-azure-debuginfo
kernel-azure
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-azure-extra-debuginfo
kernel-syms-azure
kselftests-kmp-azure
kselftests-kmp-azure-debuginfo
ocfs2-kmp-azure
ocfs2-kmp-azure-debuginfo
reiserfs-kmp-azure
reiserfs-kmp-azure-debuginfo
kernel-azure-optional-debuginfo
kernel-azure-optional
kernel-rt_debug-debugsource
kernel-source-rt
kernel-devel-rt
ocfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-syms-rt
kernel-rt_debug-devel-debuginfo
kernel-rt_debug-devel
kernel-rt_debug-debuginfo
kernel-rt-devel-debuginfo
kernel-rt-devel
kernel-rt-debugsource
kernel-rt-debuginfo
kernel-rt
gfs2-kmp-rt-debuginfo
gfs2-kmp-rt
dlm-kmp-rt-debuginfo
dlm-kmp-rt
cluster-md-kmp-rt-debuginfo
cluster-md-kmp-rt
linux-image-5.13.0-37-generic (Ubuntu package)
linux-image-5.13.0-37-generic-64k (Ubuntu package)
linux-image-5.13.0-37-generic-lpae (Ubuntu package)
linux-image-5.13.0-37-lowlatency (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-generic-lpae (Ubuntu package)
linux-image-oem-20.04 (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-5.13.0-1018-kvm (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-5.13.0-1019-aws (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-5.13.0-1021-azure (Ubuntu package)
linux-image-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-raspi (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-5.13.0-1023-oracle (Ubuntu package)
linux-image-5.13.0-1025-oracle (Ubuntu package)
kernel-docs-html
kernel-default-debuginfo
kernel-docs
reiserfs-kmp-64kb-debuginfo
reiserfs-kmp-64kb
ocfs2-kmp-64kb-debuginfo
ocfs2-kmp-64kb
kselftests-kmp-64kb-debuginfo
kselftests-kmp-64kb
kernel-64kb-optional-debuginfo
kernel-64kb-optional
kernel-64kb-livepatch-devel
kernel-64kb-extra-debuginfo
kernel-macros
kernel-source
kernel-source-vanilla
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
cluster-md-kmp-default
cluster-md-kmp-default-debuginfo
dlm-kmp-default
dlm-kmp-default-debuginfo
gfs2-kmp-default
gfs2-kmp-default-debuginfo
kernel-default
kernel-64kb-extra
kernel-kvmsmall-livepatch-devel
ocfs2-kmp-default-debuginfo
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-kvmsmall
kernel-kvmsmall-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-devel
kernel-kvmsmall-devel-debuginfo
ocfs2-kmp-default
kernel-debug-debuginfo
kernel-debug-debugsource
kernel-debug-devel-debuginfo
kernel-debug-livepatch-devel
cluster-md-kmp-64kb
cluster-md-kmp-64kb-debuginfo
kselftests-kmp-default-debuginfo
kselftests-kmp-default
kernel-syms
kernel-obs-qa
kernel-obs-build-debugsource
kernel-obs-build
kernel-default-optional-debuginfo
kernel-default-optional
kernel-default-livepatch-devel
kernel-default-livepatch
kernel-default-extra-debuginfo
kernel-default-extra
kernel-default-devel-debuginfo
kernel-default-devel
kernel-default-debugsource
dtb-sprd
dtb-lg
dtb-marvell
dtb-mediatek
dtb-nvidia
dtb-qcom
dtb-renesas
dtb-rockchip
dtb-socionext
dlm-kmp-64kb
dtb-xilinx
gfs2-kmp-64kb
gfs2-kmp-64kb-debuginfo
kernel-64kb
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-64kb-devel
dtb-apple
kernel-64kb-devel-debuginfo
dlm-kmp-64kb-debuginfo
dtb-allwinner
dtb-altera
dtb-amazon
dtb-amd
dtb-amlogic
dtb-apm
dtb-arm
dtb-broadcom
dtb-cavium
dtb-exynos
dtb-freescale
dtb-hisilicon
kernel-default-base
kernel-default-base-rebuild

How to mitigate CVE-2021-45402

Install updates from vendor's website.

Linux kernel - update to 5.16 rc5
kernel-livepatch-5_14_21-150400_24_11-default-debuginfo - update to 1-150400.9.5.3
kernel-livepatch-SLE15-SP4_Update_1-debugsource - update to 1-150400.9.5.3
kernel-livepatch-5_14_21-150400_24_11-default - update to 1-150400.9.5.3
kernel-devel - update to 4.19.91-25.8
bpftool - update to 4.19.91-25.8
kernel - update to 4.19.91-25.8
kernel-core - update to 4.19.91-25.8
kernel-debug - update to 4.19.91-25.8
kernel-debug-core - update to 4.19.91-25.8
kernel-debug-devel - update to 4.19.91-25.8
kernel-debug-modules - update to 4.19.91-25.8
kernel-debug-modules-extra - update to 4.19.91-25.8
kernel-headers - update to 4.19.91-25.8
kernel-modules - update to 4.19.91-25.8
kernel-modules-extra - update to 4.19.91-25.8
kernel-modules-internal - update to 4.19.91-25.8
kernel-tools - update to 4.19.91-25.8
kernel-tools-libs - update to 4.19.91-25.8
kernel-tools-libs-devel - update to 4.19.91-25.8
perf - update to 4.19.91-25.8
python3-perf - update to 4.19.91-25.8
cluster-md-kmp-azure-debuginfo - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-source-azure - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
cluster-md-kmp-azure - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-azure-extra - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-devel-azure - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-azure-devel - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-azure-devel-debuginfo - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-azure-livepatch-devel - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
dlm-kmp-azure - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
dlm-kmp-azure-debuginfo - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
gfs2-kmp-azure - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
gfs2-kmp-azure-debuginfo - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-azure - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-azure-debuginfo - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-azure-debugsource - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-azure-extra-debuginfo - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-syms-azure - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kselftests-kmp-azure - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kselftests-kmp-azure-debuginfo - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
ocfs2-kmp-azure - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
ocfs2-kmp-azure-debuginfo - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
reiserfs-kmp-azure - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
reiserfs-kmp-azure-debuginfo - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-azure-optional-debuginfo - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-azure-optional - addressed in versions 5.3.18-150300.38.53.1, 5.14.21-150400.14.7.1
kernel-rt_debug-debugsource - update to 5.3.18-150300.82.1
kernel-source-rt - update to 5.3.18-150300.82.1
kernel-devel-rt - update to 5.3.18-150300.82.1
ocfs2-kmp-rt-debuginfo - update to 5.3.18-150300.82.1
ocfs2-kmp-rt - update to 5.3.18-150300.82.1
kernel-syms-rt - update to 5.3.18-150300.82.1
kernel-rt_debug-devel-debuginfo - update to 5.3.18-150300.82.1
kernel-rt_debug-devel - update to 5.3.18-150300.82.1
kernel-rt_debug-debuginfo - update to 5.3.18-150300.82.1
kernel-rt-devel-debuginfo - update to 5.3.18-150300.82.1
kernel-rt-devel - update to 5.3.18-150300.82.1
kernel-rt-debugsource - update to 5.3.18-150300.82.1
kernel-rt-debuginfo - update to 5.3.18-150300.82.1
kernel-rt - update to 5.3.18-150300.82.1
gfs2-kmp-rt-debuginfo - update to 5.3.18-150300.82.1
gfs2-kmp-rt - update to 5.3.18-150300.82.1
dlm-kmp-rt-debuginfo - update to 5.3.18-150300.82.1
dlm-kmp-rt - update to 5.3.18-150300.82.1
cluster-md-kmp-rt-debuginfo - update to 5.3.18-150300.82.1
cluster-md-kmp-rt - update to 5.3.18-150300.82.1
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-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-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-lowlatency (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-generic-lpae (Ubuntu package) - update to 5.13.0.37.46
linux-image-oem-20.04 (Ubuntu package) - update to 5.13.0.37.46
linux-image-lowlatency (Ubuntu package) - update to 5.13.0.37.46
linux-image-generic (Ubuntu package) - update to 5.13.0.37.46
linux-image-generic-64k (Ubuntu package) - update to 5.13.0.37.46
linux-image-virtual (Ubuntu package) - update to 5.13.0.37.46
linux-image-kvm (Ubuntu package) - update to 5.13.0.1018.18
linux-image-5.13.0-1018-kvm (Ubuntu package) - update to 5.13.0-1018.19
linux-image-aws (Ubuntu package) - addressed in versions 5.13.0.1019.20, 5.13.0.1019.21~20.04.12
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-gke (Ubuntu package) - update to 5.13.0.1021.19
linux-image-gcp (Ubuntu package) - addressed in versions 5.13.0.1021.19, 5.13.0.1021.25~20.04.1
linux-image-5.13.0-1021-azure (Ubuntu package) - update to 5.13.0-1021.24~20.04.1
linux-image-azure (Ubuntu package) - update to 5.13.0.1021.24~20.04.10
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-raspi (Ubuntu package) - update to 5.13.0.1022.27
linux-image-oracle (Ubuntu package) - addressed in versions 5.13.0.1023.23, 5.13.0.1025.30~20.04.1
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
kernel-docs-html - update to 5.14.21-150400.24.11.1
kernel-default-debuginfo - update to 5.14.21-150400.24.11.1
kernel-docs - update to 5.14.21-150400.24.11.1
kernel-devel - update to 5.14.21-150400.24.11.1
reiserfs-kmp-64kb-debuginfo - update to 5.14.21-150400.24.11.1
reiserfs-kmp-64kb - update to 5.14.21-150400.24.11.1
ocfs2-kmp-64kb-debuginfo - update to 5.14.21-150400.24.11.1
ocfs2-kmp-64kb - update to 5.14.21-150400.24.11.1
kselftests-kmp-64kb-debuginfo - update to 5.14.21-150400.24.11.1
kselftests-kmp-64kb - update to 5.14.21-150400.24.11.1
kernel-64kb-optional-debuginfo - update to 5.14.21-150400.24.11.1
kernel-64kb-optional - update to 5.14.21-150400.24.11.1
kernel-64kb-livepatch-devel - update to 5.14.21-150400.24.11.1
kernel-64kb-extra-debuginfo - update to 5.14.21-150400.24.11.1
kernel-macros - update to 5.14.21-150400.24.11.1
kernel-source - update to 5.14.21-150400.24.11.1
kernel-source-vanilla - update to 5.14.21-150400.24.11.1
kernel-zfcpdump - update to 5.14.21-150400.24.11.1
kernel-zfcpdump-debuginfo - update to 5.14.21-150400.24.11.1
kernel-zfcpdump-debugsource - update to 5.14.21-150400.24.11.1
cluster-md-kmp-default - update to 5.14.21-150400.24.11.1
cluster-md-kmp-default-debuginfo - update to 5.14.21-150400.24.11.1
dlm-kmp-default - update to 5.14.21-150400.24.11.1
dlm-kmp-default-debuginfo - update to 5.14.21-150400.24.11.1
gfs2-kmp-default - update to 5.14.21-150400.24.11.1
gfs2-kmp-default-debuginfo - update to 5.14.21-150400.24.11.1
kernel-default - update to 5.14.21-150400.24.11.1
kernel-64kb-extra - update to 5.14.21-150400.24.11.1
kernel-kvmsmall-livepatch-devel - update to 5.14.21-150400.24.11.1
ocfs2-kmp-default-debuginfo - update to 5.14.21-150400.24.11.1
reiserfs-kmp-default - update to 5.14.21-150400.24.11.1
reiserfs-kmp-default-debuginfo - update to 5.14.21-150400.24.11.1
kernel-kvmsmall - update to 5.14.21-150400.24.11.1
kernel-kvmsmall-debuginfo - update to 5.14.21-150400.24.11.1
kernel-kvmsmall-debugsource - update to 5.14.21-150400.24.11.1
kernel-kvmsmall-devel - update to 5.14.21-150400.24.11.1
kernel-kvmsmall-devel-debuginfo - update to 5.14.21-150400.24.11.1
ocfs2-kmp-default - update to 5.14.21-150400.24.11.1
kernel-debug - update to 5.14.21-150400.24.11.1
kernel-debug-debuginfo - update to 5.14.21-150400.24.11.1
kernel-debug-debugsource - update to 5.14.21-150400.24.11.1
kernel-debug-devel - update to 5.14.21-150400.24.11.1
kernel-debug-devel-debuginfo - update to 5.14.21-150400.24.11.1
kernel-debug-livepatch-devel - update to 5.14.21-150400.24.11.1
cluster-md-kmp-64kb - update to 5.14.21-150400.24.11.1
cluster-md-kmp-64kb-debuginfo - update to 5.14.21-150400.24.11.1
kselftests-kmp-default-debuginfo - update to 5.14.21-150400.24.11.1
kselftests-kmp-default - update to 5.14.21-150400.24.11.1
kernel-syms - update to 5.14.21-150400.24.11.1
kernel-obs-qa - update to 5.14.21-150400.24.11.1
kernel-obs-build-debugsource - update to 5.14.21-150400.24.11.1
kernel-obs-build - update to 5.14.21-150400.24.11.1
kernel-default-optional-debuginfo - update to 5.14.21-150400.24.11.1
kernel-default-optional - update to 5.14.21-150400.24.11.1
kernel-default-livepatch-devel - update to 5.14.21-150400.24.11.1
kernel-default-livepatch - update to 5.14.21-150400.24.11.1
kernel-default-extra-debuginfo - update to 5.14.21-150400.24.11.1
kernel-default-extra - update to 5.14.21-150400.24.11.1
kernel-default-devel-debuginfo - update to 5.14.21-150400.24.11.1
kernel-default-devel - update to 5.14.21-150400.24.11.1
kernel-default-debugsource - update to 5.14.21-150400.24.11.1
dtb-sprd - update to 5.14.21-150400.24.11.1
dtb-lg - update to 5.14.21-150400.24.11.1
dtb-marvell - update to 5.14.21-150400.24.11.1
dtb-mediatek - update to 5.14.21-150400.24.11.1
dtb-nvidia - update to 5.14.21-150400.24.11.1
dtb-qcom - update to 5.14.21-150400.24.11.1
dtb-renesas - update to 5.14.21-150400.24.11.1
dtb-rockchip - update to 5.14.21-150400.24.11.1
dtb-socionext - update to 5.14.21-150400.24.11.1
dlm-kmp-64kb - update to 5.14.21-150400.24.11.1
dtb-xilinx - update to 5.14.21-150400.24.11.1
gfs2-kmp-64kb - update to 5.14.21-150400.24.11.1
gfs2-kmp-64kb-debuginfo - update to 5.14.21-150400.24.11.1
kernel-64kb - update to 5.14.21-150400.24.11.1
kernel-64kb-debuginfo - update to 5.14.21-150400.24.11.1
kernel-64kb-debugsource - update to 5.14.21-150400.24.11.1
kernel-64kb-devel - update to 5.14.21-150400.24.11.1
dtb-apple - update to 5.14.21-150400.24.11.1
kernel-64kb-devel-debuginfo - update to 5.14.21-150400.24.11.1
dlm-kmp-64kb-debuginfo - update to 5.14.21-150400.24.11.1
dtb-allwinner - update to 5.14.21-150400.24.11.1
dtb-altera - update to 5.14.21-150400.24.11.1
dtb-amazon - update to 5.14.21-150400.24.11.1
dtb-amd - update to 5.14.21-150400.24.11.1
dtb-amlogic - update to 5.14.21-150400.24.11.1
dtb-apm - update to 5.14.21-150400.24.11.1
dtb-arm - update to 5.14.21-150400.24.11.1
dtb-broadcom - update to 5.14.21-150400.24.11.1
dtb-cavium - update to 5.14.21-150400.24.11.1
dtb-exynos - update to 5.14.21-150400.24.11.1
dtb-freescale - update to 5.14.21-150400.24.11.1
dtb-hisilicon - update to 5.14.21-150400.24.11.1
kernel-default-base - update to 5.14.21-150400.24.11.1.150400.24.3.6
kernel-default-base-rebuild - update to 5.14.21-150400.24.11.1.150400.24.3.6

External References

Related Security Bulletins