NULL pointer dereference in Linux kernel - CVE-2022-40476

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Main Vulnerability Database Vulnerabilities #VU70501

NULL pointer dereference in Linux kernel - CVE-2022-40476

Published: December 27, 2022


Vulnerability identifier: #VU70501
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-2022-40476
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a NULL pointer dereference error in fs/io_uring.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Manager Server
SUSE Manager Proxy
SUSE Manager Retail Branch Server
openSUSE Leap Micro
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Server for SAP Applications
SUSE Linux Enterprise Server
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Public Cloud
SUSE Linux Enterprise Real Time
SUSE Linux Enterprise Module for Realtime
SUSE Linux Enterprise Module for Live Patching
SUSE Linux Enterprise Desktop
SUSE Linux Enterprise Workstation Extension
SUSE Linux Enterprise High Availability
SUSE Linux Enterprise Module for Legacy Software
SUSE Linux Enterprise Module for Development Tools
SUSE Linux Enterprise Module for Basesystem
openSUSE Leap
kernel-livepatch-SLE15-SP4-RT_Update_1-debugsource
kernel-livepatch-5_14_21-150400_15_5-rt-debuginfo
kernel-livepatch-5_14_21-150400_15_5-rt
kernel-livepatch-SLE15-SP4_Update_5-debugsource
kernel-livepatch-5_14_21-150400_24_33-default-debuginfo
kernel-livepatch-5_14_21-150400_24_33-default
kernel-source-azure
kernel-devel-azure
kernel-syms-azure
cluster-md-kmp-azure-debuginfo
reiserfs-kmp-azure-debuginfo
reiserfs-kmp-azure
ocfs2-kmp-azure-debuginfo
ocfs2-kmp-azure
kselftests-kmp-azure-debuginfo
kselftests-kmp-azure
kernel-azure-optional
cluster-md-kmp-azure
dlm-kmp-azure
dlm-kmp-azure-debuginfo
gfs2-kmp-azure
gfs2-kmp-azure-debuginfo
kernel-azure
kernel-azure-debuginfo
kernel-azure-optional-debuginfo
kernel-azure-debugsource
kernel-azure-devel
kernel-azure-devel-debuginfo
kernel-azure-extra
kernel-azure-livepatch-devel
kernel-azure-extra-debuginfo
kernel-syms-rt
ocfs2-kmp-rt-debuginfo
kernel-rt
kernel-rt-debuginfo
kernel-rt-debugsource
kernel-devel-rt
kernel-source-rt
cluster-md-kmp-rt
cluster-md-kmp-rt-debuginfo
dlm-kmp-rt
gfs2-kmp-rt
dlm-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-rt_debug-devel-debuginfo
kernel-rt_debug-devel
kernel-rt_debug-debugsource
kernel-rt_debug-debuginfo
kernel-rt_debug
kernel-rt-devel-debuginfo
kernel-rt-devel
gfs2-kmp-rt-debuginfo
dtb-apm
dtb-apple
dtb-arm
dtb-broadcom
dtb-cavium
dtb-exynos
dtb-freescale
dtb-hisilicon
dtb-lg
dtb-marvell
dtb-mediatek
dtb-nvidia
dtb-qcom
dtb-renesas
dtb-rockchip
dtb-socionext
dtb-sprd
dtb-xilinx
kernel-devel
kernel-macros
kernel-source
kernel-source-vanilla
dtb-amd
kernel-obs-build
kernel-obs-build-debugsource
kernel-obs-qa
kernel-syms
dtb-amazon
dtb-altera
dtb-allwinner
dtb-amlogic
kernel-zfcpdump-debugsource
kernel-docs
kselftests-kmp-default
kselftests-kmp-default-debuginfo
ocfs2-kmp-default
ocfs2-kmp-default-debuginfo
kernel-zfcpdump-debuginfo
kernel-zfcpdump
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-kvmsmall
kernel-docs-html
cluster-md-kmp-default
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
kernel-default-debuginfo
kernel-default
gfs2-kmp-default-debuginfo
gfs2-kmp-default
dlm-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default-debuginfo
kernel-debug-debugsource
kernel-kvmsmall-debuginfo
gfs2-kmp-64kb
kernel-kvmsmall-debugsource
kernel-kvmsmall-devel
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-livepatch-devel
kernel-debug
kernel-debug-debuginfo
gfs2-kmp-64kb-debuginfo
kernel-debug-devel
kernel-debug-devel-debuginfo
kernel-debug-livepatch-devel
cluster-md-kmp-64kb
cluster-md-kmp-64kb-debuginfo
dlm-kmp-64kb
dlm-kmp-64kb-debuginfo
kernel-64kb-debuginfo
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-64kb-extra
kernel-64kb-devel-debuginfo
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb
kernel-default-base-rebuild
kernel-default-base

How to mitigate CVE-2022-40476

Install update from vendor's website.

Linux kernel - update to 5.15.62
kernel-livepatch-SLE15-SP4-RT_Update_1-debugsource - update to 1-150400.1.3.1
kernel-livepatch-5_14_21-150400_15_5-rt-debuginfo - update to 1-150400.1.3.1
kernel-livepatch-5_14_21-150400_15_5-rt - update to 1-150400.1.3.1
kernel-livepatch-SLE15-SP4_Update_5-debugsource - update to 1-150400.9.3.4
kernel-livepatch-5_14_21-150400_24_33-default-debuginfo - update to 1-150400.9.3.4
kernel-livepatch-5_14_21-150400_24_33-default - update to 1-150400.9.3.4
kernel-source-azure - update to 5.14.21-150400.14.21.1
kernel-devel-azure - update to 5.14.21-150400.14.21.1
kernel-syms-azure - update to 5.14.21-150400.14.21.1
cluster-md-kmp-azure-debuginfo - update to 5.14.21-150400.14.21.2
reiserfs-kmp-azure-debuginfo - update to 5.14.21-150400.14.21.2
reiserfs-kmp-azure - update to 5.14.21-150400.14.21.2
ocfs2-kmp-azure-debuginfo - update to 5.14.21-150400.14.21.2
ocfs2-kmp-azure - update to 5.14.21-150400.14.21.2
kselftests-kmp-azure-debuginfo - update to 5.14.21-150400.14.21.2
kselftests-kmp-azure - update to 5.14.21-150400.14.21.2
kernel-azure-optional - update to 5.14.21-150400.14.21.2
cluster-md-kmp-azure - update to 5.14.21-150400.14.21.2
dlm-kmp-azure - update to 5.14.21-150400.14.21.2
dlm-kmp-azure-debuginfo - update to 5.14.21-150400.14.21.2
gfs2-kmp-azure - update to 5.14.21-150400.14.21.2
gfs2-kmp-azure-debuginfo - update to 5.14.21-150400.14.21.2
kernel-azure - update to 5.14.21-150400.14.21.2
kernel-azure-debuginfo - update to 5.14.21-150400.14.21.2
kernel-azure-optional-debuginfo - update to 5.14.21-150400.14.21.2
kernel-azure-debugsource - update to 5.14.21-150400.14.21.2
kernel-azure-devel - update to 5.14.21-150400.14.21.2
kernel-azure-devel-debuginfo - update to 5.14.21-150400.14.21.2
kernel-azure-extra - update to 5.14.21-150400.14.21.2
kernel-azure-livepatch-devel - update to 5.14.21-150400.14.21.2
kernel-azure-extra-debuginfo - update to 5.14.21-150400.14.21.2
kernel-syms-rt - update to 5.14.21-150400.15.5.1
ocfs2-kmp-rt-debuginfo - update to 5.14.21-150400.15.5.1
kernel-rt - update to 5.14.21-150400.15.5.1
kernel-rt-debuginfo - update to 5.14.21-150400.15.5.1
kernel-rt-debugsource - update to 5.14.21-150400.15.5.1
kernel-devel-rt - update to 5.14.21-150400.15.5.1
kernel-source-rt - update to 5.14.21-150400.15.5.1
cluster-md-kmp-rt - update to 5.14.21-150400.15.5.1
cluster-md-kmp-rt-debuginfo - update to 5.14.21-150400.15.5.1
dlm-kmp-rt - update to 5.14.21-150400.15.5.1
gfs2-kmp-rt - update to 5.14.21-150400.15.5.1
dlm-kmp-rt-debuginfo - update to 5.14.21-150400.15.5.1
ocfs2-kmp-rt - update to 5.14.21-150400.15.5.1
kernel-rt_debug-devel-debuginfo - update to 5.14.21-150400.15.5.1
kernel-rt_debug-devel - update to 5.14.21-150400.15.5.1
kernel-rt_debug-debugsource - update to 5.14.21-150400.15.5.1
kernel-rt_debug-debuginfo - update to 5.14.21-150400.15.5.1
kernel-rt_debug - update to 5.14.21-150400.15.5.1
kernel-rt-devel-debuginfo - update to 5.14.21-150400.15.5.1
kernel-rt-devel - update to 5.14.21-150400.15.5.1
gfs2-kmp-rt-debuginfo - update to 5.14.21-150400.15.5.1
dtb-apm - update to 5.14.21-150400.24.33.1
dtb-apple - update to 5.14.21-150400.24.33.1
dtb-arm - update to 5.14.21-150400.24.33.1
dtb-broadcom - update to 5.14.21-150400.24.33.1
dtb-cavium - update to 5.14.21-150400.24.33.1
dtb-exynos - update to 5.14.21-150400.24.33.1
dtb-freescale - update to 5.14.21-150400.24.33.1
dtb-hisilicon - update to 5.14.21-150400.24.33.1
dtb-lg - update to 5.14.21-150400.24.33.1
dtb-marvell - update to 5.14.21-150400.24.33.1
dtb-mediatek - update to 5.14.21-150400.24.33.1
dtb-nvidia - update to 5.14.21-150400.24.33.1
dtb-qcom - update to 5.14.21-150400.24.33.1
dtb-renesas - update to 5.14.21-150400.24.33.1
dtb-rockchip - update to 5.14.21-150400.24.33.1
dtb-socionext - update to 5.14.21-150400.24.33.1
dtb-sprd - update to 5.14.21-150400.24.33.1
dtb-xilinx - update to 5.14.21-150400.24.33.1
kernel-devel - update to 5.14.21-150400.24.33.1
kernel-macros - update to 5.14.21-150400.24.33.1
kernel-source - update to 5.14.21-150400.24.33.1
kernel-source-vanilla - update to 5.14.21-150400.24.33.1
dtb-amd - update to 5.14.21-150400.24.33.1
kernel-obs-build - update to 5.14.21-150400.24.33.1
kernel-obs-build-debugsource - update to 5.14.21-150400.24.33.1
kernel-obs-qa - update to 5.14.21-150400.24.33.1
kernel-syms - update to 5.14.21-150400.24.33.1
dtb-amazon - update to 5.14.21-150400.24.33.1
dtb-altera - update to 5.14.21-150400.24.33.1
dtb-allwinner - update to 5.14.21-150400.24.33.1
dtb-amlogic - update to 5.14.21-150400.24.33.1
kernel-zfcpdump-debugsource - update to 5.14.21-150400.24.33.2
kernel-docs - update to 5.14.21-150400.24.33.2
kselftests-kmp-default - update to 5.14.21-150400.24.33.2
kselftests-kmp-default-debuginfo - update to 5.14.21-150400.24.33.2
ocfs2-kmp-default - update to 5.14.21-150400.24.33.2
ocfs2-kmp-default-debuginfo - update to 5.14.21-150400.24.33.2
kernel-zfcpdump-debuginfo - update to 5.14.21-150400.24.33.2
kernel-zfcpdump - update to 5.14.21-150400.24.33.2
reiserfs-kmp-default - update to 5.14.21-150400.24.33.2
reiserfs-kmp-default-debuginfo - update to 5.14.21-150400.24.33.2
kernel-kvmsmall - update to 5.14.21-150400.24.33.2
kernel-docs-html - update to 5.14.21-150400.24.33.2
cluster-md-kmp-default - update to 5.14.21-150400.24.33.2
kernel-default-optional-debuginfo - update to 5.14.21-150400.24.33.2
kernel-default-optional - update to 5.14.21-150400.24.33.2
kernel-default-livepatch-devel - update to 5.14.21-150400.24.33.2
kernel-default-livepatch - update to 5.14.21-150400.24.33.2
kernel-default-extra-debuginfo - update to 5.14.21-150400.24.33.2
kernel-default-extra - update to 5.14.21-150400.24.33.2
kernel-default-devel-debuginfo - update to 5.14.21-150400.24.33.2
kernel-default-devel - update to 5.14.21-150400.24.33.2
kernel-default-debugsource - update to 5.14.21-150400.24.33.2
kernel-default-debuginfo - update to 5.14.21-150400.24.33.2
kernel-default - update to 5.14.21-150400.24.33.2
gfs2-kmp-default-debuginfo - update to 5.14.21-150400.24.33.2
gfs2-kmp-default - update to 5.14.21-150400.24.33.2
dlm-kmp-default-debuginfo - update to 5.14.21-150400.24.33.2
dlm-kmp-default - update to 5.14.21-150400.24.33.2
cluster-md-kmp-default-debuginfo - update to 5.14.21-150400.24.33.2
kernel-debug-debugsource - update to 5.14.21-150400.24.33.2
kernel-kvmsmall-debuginfo - update to 5.14.21-150400.24.33.2
gfs2-kmp-64kb - update to 5.14.21-150400.24.33.2
kernel-kvmsmall-debugsource - update to 5.14.21-150400.24.33.2
kernel-kvmsmall-devel - update to 5.14.21-150400.24.33.2
kernel-kvmsmall-devel-debuginfo - update to 5.14.21-150400.24.33.2
kernel-kvmsmall-livepatch-devel - update to 5.14.21-150400.24.33.2
kernel-debug - update to 5.14.21-150400.24.33.2
kernel-debug-debuginfo - update to 5.14.21-150400.24.33.2
gfs2-kmp-64kb-debuginfo - update to 5.14.21-150400.24.33.2
kernel-debug-devel - update to 5.14.21-150400.24.33.2
kernel-debug-devel-debuginfo - update to 5.14.21-150400.24.33.2
kernel-debug-livepatch-devel - update to 5.14.21-150400.24.33.2
cluster-md-kmp-64kb - update to 5.14.21-150400.24.33.2
cluster-md-kmp-64kb-debuginfo - update to 5.14.21-150400.24.33.2
dlm-kmp-64kb - update to 5.14.21-150400.24.33.2
dlm-kmp-64kb-debuginfo - update to 5.14.21-150400.24.33.2
kernel-64kb-debuginfo - update to 5.14.21-150400.24.33.2
reiserfs-kmp-64kb-debuginfo - update to 5.14.21-150400.24.33.2
reiserfs-kmp-64kb - update to 5.14.21-150400.24.33.2
ocfs2-kmp-64kb-debuginfo - update to 5.14.21-150400.24.33.2
ocfs2-kmp-64kb - update to 5.14.21-150400.24.33.2
kselftests-kmp-64kb-debuginfo - update to 5.14.21-150400.24.33.2
kselftests-kmp-64kb - update to 5.14.21-150400.24.33.2
kernel-64kb-optional-debuginfo - update to 5.14.21-150400.24.33.2
kernel-64kb-optional - update to 5.14.21-150400.24.33.2
kernel-64kb-livepatch-devel - update to 5.14.21-150400.24.33.2
kernel-64kb-extra-debuginfo - update to 5.14.21-150400.24.33.2
kernel-64kb-extra - update to 5.14.21-150400.24.33.2
kernel-64kb-devel-debuginfo - update to 5.14.21-150400.24.33.2
kernel-64kb-devel - update to 5.14.21-150400.24.33.2
kernel-64kb-debugsource - update to 5.14.21-150400.24.33.2
kernel-64kb - update to 5.14.21-150400.24.33.2
kernel-default-base-rebuild - update to 5.14.21-150400.24.33.2.150400.24.11.4
kernel-default-base - update to 5.14.21-150400.24.33.2.150400.24.11.4

External References

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