NULL pointer dereference in Linux kernel - CVE-2022-50356

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Main Vulnerability Database Vulnerabilities #VU115800

NULL pointer dereference in Linux kernel - CVE-2022-50356

Published: September 18, 2025 / Updated: September 22, 2025


Vulnerability identifier: #VU115800
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-2022-50356
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 NULL pointer dereference within the sfb_reset() function in net/sched/sch_sfb.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Micro
Anolis OS
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
SUSE Linux Enterprise Live Patching
openSUSE Leap
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kgraft-patch-4_12_14-122_280-default
kernel-livepatch-5_14_21-150500_55_124-default
kernel-livepatch-5_14_21-150500_55_124-default-debuginfo
kernel-livepatch-SLE15-SP5_Update_31-debugsource
kernel-devel
bpftool
kernel
kernel-debug
kernel-debug-devel
kernel-headers
kernel-tools
kernel-tools-libs
kernel-tools-libs-devel
perf
python-perf
kernel-abi-whitelists
kernel-doc
kernel (Red Hat package)
kernel-rt (Red Hat package)
gfs2-kmp-default
kernel-default-base
kernel-syms
gfs2-kmp-default-debuginfo
kernel-default-man
kernel-default-debugsource
ocfs2-kmp-default-debuginfo
dlm-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default
kernel-default-devel
ocfs2-kmp-default
kernel-default-debuginfo
kernel-default-base-debuginfo
kernel-default
kernel-source
kernel-macros
kernel-default-devel-debuginfo
kernel-default-kgraft
kernel-default-kgraft-devel
kselftests-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
kernel-rt-extra
kernel-rt-vdso
kernel-rt_debug-devel
ocfs2-kmp-rt
kernel-rt_debug-debugsource
kernel-rt-livepatch
kernel-syms-rt
kernel-rt-debugsource
kernel-rt_debug-devel-debuginfo
dlm-kmp-rt
kernel-rt_debug-vdso-debuginfo
reiserfs-kmp-rt
kselftests-kmp-rt
kernel-rt-extra-debuginfo
kernel-source-rt
kernel-devel-rt
gfs2-kmp-rt
kernel-rt_debug
kernel-rt
kernel-rt-debuginfo
kernel-rt_debug-vdso
kernel-rt-devel-debuginfo
kernel-rt-optional-debuginfo
cluster-md-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
reiserfs-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
kernel-rt-vdso-debuginfo
cluster-md-kmp-rt
kernel-rt-devel
kernel-rt-livepatch-devel
kernel-rt_debug-debuginfo
kernel-rt-optional
dtb-broadcom
kernel-64kb-debuginfo
dtb-exynos
ocfs2-kmp-64kb-debuginfo
kernel-64kb
kernel-64kb-devel-debuginfo
kernel-obs-build
reiserfs-kmp-default
kselftests-kmp-default-debuginfo
kernel-default-extra-debuginfo
reiserfs-kmp-default-debuginfo
kselftests-kmp-default
kernel-default-optional
kernel-default-livepatch
kernel-default-livepatch-devel
kernel-kvmsmall-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-default-vdso-debuginfo
kernel-default-vdso
dtb-amazon
kernel-default-optional-debuginfo
kernel-source-vanilla
kernel-docs-html
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel
kernel-default-extra
kernel-kvmsmall
kernel-obs-build-debugsource
kernel-obs-qa
dlm-kmp-64kb
kernel-zfcpdump
dtb-marvell
kernel-64kb-extra-debuginfo
dtb-rockchip
kernel-64kb-extra
dtb-lg
reiserfs-kmp-64kb-debuginfo
dtb-nvidia
dtb-socionext
cluster-md-kmp-64kb
dtb-apple
kselftests-kmp-64kb-debuginfo
dtb-apm
ocfs2-kmp-64kb
dtb-qcom
dtb-xilinx
dtb-amd
dlm-kmp-64kb-debuginfo
dtb-allwinner
kernel-docs
kernel-64kb-optional
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
dtb-aarch64
dtb-amlogic
dtb-altera
dtb-cavium
cluster-md-kmp-64kb-debuginfo
gfs2-kmp-64kb-debuginfo
kselftests-kmp-64kb
reiserfs-kmp-64kb
kernel-64kb-debugsource
kernel-64kb-optional-debuginfo
dtb-freescale
dtb-renesas
dtb-arm
dtb-mediatek
dtb-sprd
kernel-64kb-devel
gfs2-kmp-64kb
dtb-hisilicon
kernel-default-base-rebuild

How to mitigate CVE-2022-50356

Install update from vendor's repository.

Linux kernel - update to 5.10.152
kgraft-patch-4_12_14-122_280-default - update to 1-8.5.1
kernel-livepatch-5_14_21-150500_55_124-default - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_55_124-default-debuginfo - update to 1-150500.11.3.1
kernel-livepatch-SLE15-SP5_Update_31-debugsource - update to 1-150500.11.3.1
kernel-devel - update to 3.10.0-1160.144.1
bpftool - update to 3.10.0-1160.144.1
kernel - update to 3.10.0-1160.144.1
kernel-debug - update to 3.10.0-1160.144.1
kernel-debug-devel - update to 3.10.0-1160.144.1
kernel-headers - update to 3.10.0-1160.144.1
kernel-tools - update to 3.10.0-1160.144.1
kernel-tools-libs - update to 3.10.0-1160.144.1
kernel-tools-libs-devel - update to 3.10.0-1160.144.1
perf - update to 3.10.0-1160.144.1
python-perf - update to 3.10.0-1160.144.1
kernel-abi-whitelists - update to 3.10.0-1160.144.1
kernel-doc - update to 3.10.0-1160.144.1
kernel (Red Hat package) - addressed in versions 3.10.0-1160.144.1.el7, 4.18.0-193.178.1.el8_2, 4.18.0-305.179.1.el8_4, 4.18.0-372.170.1.el8_6, 4.18.0-477.118.1.el8_8, 5.14.0-70.153.1.el9_0, 5.14.0-284.146.1.el9_2
kernel-rt (Red Hat package) - addressed in versions 3.10.0-1160.144.1.rt56.1296.el7, 5.14.0-70.153.1.rt21.225.el9_0, 5.14.0-284.146.1.rt14.431.el9_2
gfs2-kmp-default - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
kernel-default-base - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1.150500.6.59.1
kernel-syms - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
kernel-default-man - update to 4.12.14-122.280.1
kernel-default-debugsource - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
dlm-kmp-default - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
kernel-default-devel - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
kernel-default-base-debuginfo - update to 4.12.14-122.280.1
kernel-default - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
kernel-source - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
kernel-devel - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
kernel-macros - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.280.1, 5.14.21-150500.55.124.1
kernel-default-kgraft - update to 4.12.14-122.280.1
kernel-default-kgraft-devel - update to 4.12.14-122.280.1
kselftests-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
gfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
kernel-rt-extra - update to 5.14.21-150500.13.109.1
kernel-rt-vdso - update to 5.14.21-150500.13.109.1
kernel-rt_debug-devel - update to 5.14.21-150500.13.109.1
ocfs2-kmp-rt - update to 5.14.21-150500.13.109.1
kernel-rt_debug-debugsource - update to 5.14.21-150500.13.109.1
kernel-rt-livepatch - update to 5.14.21-150500.13.109.1
kernel-syms-rt - update to 5.14.21-150500.13.109.1
kernel-rt-debugsource - update to 5.14.21-150500.13.109.1
kernel-rt_debug-devel-debuginfo - update to 5.14.21-150500.13.109.1
dlm-kmp-rt - update to 5.14.21-150500.13.109.1
kernel-rt_debug-vdso-debuginfo - update to 5.14.21-150500.13.109.1
reiserfs-kmp-rt - update to 5.14.21-150500.13.109.1
kselftests-kmp-rt - update to 5.14.21-150500.13.109.1
kernel-rt-extra-debuginfo - update to 5.14.21-150500.13.109.1
kernel-source-rt - update to 5.14.21-150500.13.109.1
kernel-devel-rt - update to 5.14.21-150500.13.109.1
gfs2-kmp-rt - update to 5.14.21-150500.13.109.1
kernel-rt_debug - update to 5.14.21-150500.13.109.1
kernel-rt - update to 5.14.21-150500.13.109.1
kernel-rt-debuginfo - update to 5.14.21-150500.13.109.1
kernel-rt_debug-vdso - update to 5.14.21-150500.13.109.1
kernel-rt-devel-debuginfo - update to 5.14.21-150500.13.109.1
kernel-rt-optional-debuginfo - update to 5.14.21-150500.13.109.1
cluster-md-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
ocfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
reiserfs-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
dlm-kmp-rt-debuginfo - update to 5.14.21-150500.13.109.1
kernel-rt-vdso-debuginfo - update to 5.14.21-150500.13.109.1
cluster-md-kmp-rt - update to 5.14.21-150500.13.109.1
kernel-rt-devel - update to 5.14.21-150500.13.109.1
kernel-rt-livepatch-devel - update to 5.14.21-150500.13.109.1
kernel-rt_debug-debuginfo - update to 5.14.21-150500.13.109.1
kernel-rt-optional - update to 5.14.21-150500.13.109.1
dtb-broadcom - update to 5.14.21-150500.55.124.1
kernel-64kb-debuginfo - update to 5.14.21-150500.55.124.1
dtb-exynos - update to 5.14.21-150500.55.124.1
ocfs2-kmp-64kb-debuginfo - update to 5.14.21-150500.55.124.1
kernel-64kb - update to 5.14.21-150500.55.124.1
kernel-64kb-devel-debuginfo - update to 5.14.21-150500.55.124.1
kernel-obs-build - update to 5.14.21-150500.55.124.1
reiserfs-kmp-default - update to 5.14.21-150500.55.124.1
kselftests-kmp-default-debuginfo - update to 5.14.21-150500.55.124.1
kernel-default-extra-debuginfo - update to 5.14.21-150500.55.124.1
reiserfs-kmp-default-debuginfo - update to 5.14.21-150500.55.124.1
kselftests-kmp-default - update to 5.14.21-150500.55.124.1
kernel-default-optional - update to 5.14.21-150500.55.124.1
kernel-default-livepatch - update to 5.14.21-150500.55.124.1
kernel-default-livepatch-devel - update to 5.14.21-150500.55.124.1
kernel-kvmsmall-vdso - update to 5.14.21-150500.55.124.1
kernel-kvmsmall-vdso-debuginfo - update to 5.14.21-150500.55.124.1
kernel-default-vdso-debuginfo - update to 5.14.21-150500.55.124.1
kernel-default-vdso - update to 5.14.21-150500.55.124.1
dtb-amazon - update to 5.14.21-150500.55.124.1
kernel-default-optional-debuginfo - update to 5.14.21-150500.55.124.1
kernel-source-vanilla - update to 5.14.21-150500.55.124.1
kernel-docs-html - update to 5.14.21-150500.55.124.1
kernel-kvmsmall-devel-debuginfo - update to 5.14.21-150500.55.124.1
kernel-kvmsmall-debugsource - update to 5.14.21-150500.55.124.1
kernel-kvmsmall-debuginfo - update to 5.14.21-150500.55.124.1
kernel-kvmsmall-devel - update to 5.14.21-150500.55.124.1
kernel-default-extra - update to 5.14.21-150500.55.124.1
kernel-kvmsmall - update to 5.14.21-150500.55.124.1
kernel-obs-build-debugsource - update to 5.14.21-150500.55.124.1
kernel-obs-qa - update to 5.14.21-150500.55.124.1
dlm-kmp-64kb - update to 5.14.21-150500.55.124.1
kernel-zfcpdump - update to 5.14.21-150500.55.124.1
dtb-marvell - update to 5.14.21-150500.55.124.1
kernel-64kb-extra-debuginfo - update to 5.14.21-150500.55.124.1
dtb-rockchip - update to 5.14.21-150500.55.124.1
kernel-64kb-extra - update to 5.14.21-150500.55.124.1
dtb-lg - update to 5.14.21-150500.55.124.1
reiserfs-kmp-64kb-debuginfo - update to 5.14.21-150500.55.124.1
dtb-nvidia - update to 5.14.21-150500.55.124.1
dtb-socionext - update to 5.14.21-150500.55.124.1
cluster-md-kmp-64kb - update to 5.14.21-150500.55.124.1
dtb-apple - update to 5.14.21-150500.55.124.1
kselftests-kmp-64kb-debuginfo - update to 5.14.21-150500.55.124.1
dtb-apm - update to 5.14.21-150500.55.124.1
ocfs2-kmp-64kb - update to 5.14.21-150500.55.124.1
dtb-qcom - update to 5.14.21-150500.55.124.1
dtb-xilinx - update to 5.14.21-150500.55.124.1
dtb-amd - update to 5.14.21-150500.55.124.1
dlm-kmp-64kb-debuginfo - update to 5.14.21-150500.55.124.1
dtb-allwinner - update to 5.14.21-150500.55.124.1
kernel-docs - update to 5.14.21-150500.55.124.1
kernel-64kb-optional - update to 5.14.21-150500.55.124.1
kernel-zfcpdump-debugsource - update to 5.14.21-150500.55.124.1
kernel-zfcpdump-debuginfo - update to 5.14.21-150500.55.124.1
dtb-aarch64 - update to 5.14.21-150500.55.124.1
dtb-amlogic - update to 5.14.21-150500.55.124.1
dtb-altera - update to 5.14.21-150500.55.124.1
dtb-cavium - update to 5.14.21-150500.55.124.1
cluster-md-kmp-64kb-debuginfo - update to 5.14.21-150500.55.124.1
gfs2-kmp-64kb-debuginfo - update to 5.14.21-150500.55.124.1
kselftests-kmp-64kb - update to 5.14.21-150500.55.124.1
reiserfs-kmp-64kb - update to 5.14.21-150500.55.124.1
kernel-64kb-debugsource - update to 5.14.21-150500.55.124.1
kernel-64kb-optional-debuginfo - update to 5.14.21-150500.55.124.1
dtb-freescale - update to 5.14.21-150500.55.124.1
dtb-renesas - update to 5.14.21-150500.55.124.1
dtb-arm - update to 5.14.21-150500.55.124.1
dtb-mediatek - update to 5.14.21-150500.55.124.1
dtb-sprd - update to 5.14.21-150500.55.124.1
kernel-64kb-devel - update to 5.14.21-150500.55.124.1
gfs2-kmp-64kb - update to 5.14.21-150500.55.124.1
dtb-hisilicon - update to 5.14.21-150500.55.124.1
kernel-default-base-rebuild - update to 5.14.21-150500.55.124.1.150500.6.59.1

External References

Related Security Bulletins