NULL pointer dereference in Linux kernel - CVE-2022-49977

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Main Vulnerability Database Vulnerabilities #VU111519

NULL pointer dereference in Linux kernel - CVE-2022-49977

Published: June 19, 2025 / Updated: June 21, 2025


Vulnerability identifier: #VU111519
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-2022-49977
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 ftrace_startup() function in kernel/trace/ftrace.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Availability Extension 15
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 Real Time 15
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Anolis OS
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
SUSE Linux Enterprise Live Patching
openSUSE Leap
IBM Qradar SIEM
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
kernel-livepatch-SLE15-SP4_Update_42-debugsource
kernel-livepatch-5_14_21-150400_24_170-default-debuginfo
kernel-livepatch-5_14_21-150400_24_170-default
kernel-livepatch-5_14_21-150500_55_113-default
kernel-livepatch-SLE15-SP5_Update_28-debugsource
kernel-livepatch-5_14_21-150500_55_113-default-debuginfo
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-headers
kernel-devel
kernel-debug-modules-extra
kernel-debug-modules
kernel-debug-devel
kernel-debug-core
kernel-debug
kernel-cross-headers
kernel-core
kernel
bpftool
kernel-modules
kernel-modules-extra
kernel-tools
kernel-tools-libs
kernel-tools-libs-devel
perf
python3-perf
kernel-abi-stablelists
kernel-doc
dtb-cavium
dtb-amazon
dtb-apm
dtb-sprd
dtb-amlogic
dtb-marvell
dtb-rockchip
dtb-socionext
dtb-hisilicon
dtb-xilinx
dtb-lg
dtb-mediatek
dtb-freescale
dtb-altera
dtb-allwinner
kernel-docs
dtb-broadcom
kernel-source
dtb-aarch64
dtb-qcom
dtb-renesas
dtb-amd
dtb-exynos
dtb-apple
kernel-syms
dtb-arm
kernel-obs-qa
dtb-nvidia
kernel-docs-html
kernel-macros
kernel-source-vanilla
kernel-kvmsmall-debuginfo
kernel-default-livepatch
kernel-default-debuginfo
kernel-default-extra
kernel-obs-build-debugsource
kernel-default-debugsource
ocfs2-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-devel
reiserfs-kmp-default
kernel-obs-build
gfs2-kmp-default-debuginfo
kselftests-kmp-default
kernel-default-extra-debuginfo
gfs2-kmp-default
cluster-md-kmp-default
ocfs2-kmp-default
kernel-kvmsmall-devel
kernel-default-optional
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debugsource
kernel-default
kernel-default-livepatch-devel
kernel-64kb-devel
cluster-md-kmp-64kb-debuginfo
kernel-zfcpdump
kernel-default-optional-debuginfo
kernel-64kb-extra
kernel-64kb-devel-debuginfo
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
reiserfs-kmp-64kb
ocfs2-kmp-64kb
reiserfs-kmp-64kb-debuginfo
ocfs2-kmp-64kb-debuginfo
kernel-64kb-extra-debuginfo
kselftests-kmp-64kb
dlm-kmp-64kb-debuginfo
gfs2-kmp-64kb
dlm-kmp-64kb
gfs2-kmp-64kb-debuginfo
kselftests-kmp-default-debuginfo
dlm-kmp-default
reiserfs-kmp-default-debuginfo
dlm-kmp-default-debuginfo
kernel-default-devel-debuginfo
kernel-64kb
cluster-md-kmp-64kb
kernel-64kb-debugsource
kernel-64kb-optional-debuginfo
kernel-64kb-optional
kernel-kvmsmall
kselftests-kmp-64kb-debuginfo
kernel-64kb-debuginfo
kernel-default-base-rebuild
kernel-default-base
Red Hat OpenShift Container Platform

How to mitigate CVE-2022-49977

Install update from vendor's repository.

Linux kernel - update to 5.15.65
IBM Qradar SIEM - update to 7.5.0 Update Pack 13 IF01
kernel-livepatch-SLE15-SP4_Update_42-debugsource - update to 1-150400.9.3.2
kernel-livepatch-5_14_21-150400_24_170-default-debuginfo - update to 1-150400.9.3.2
kernel-livepatch-5_14_21-150400_24_170-default - update to 1-150400.9.3.2
kernel-livepatch-5_14_21-150500_55_113-default - update to 1-150500.11.3.1
kernel-livepatch-SLE15-SP5_Update_28-debugsource - update to 1-150500.11.3.1
kernel-livepatch-5_14_21-150500_55_113-default-debuginfo - update to 1-150500.11.3.1
Red Hat OpenShift Container Platform - update to 4.15.56
kernel (Red Hat package) - addressed in versions 4.18.0-193.165.1.el8_2, 4.18.0-305.170.1.el8_4, 4.18.0-372.158.1.el8_6, 4.18.0-477.107.1.el8_8, 5.14.0-70.144.1.el9_0, 5.14.0-284.134.1.el9_2
kernel-rt (Red Hat package) - addressed in versions 4.18.0-553.64.1.rt7.405.el8_10, 5.14.0-70.144.1.rt21.216.el9_0, 5.14.0-284.134.1.rt14.419.el9_2
kernel-headers - update to 4.18.0-553.64.1.0.1
kernel-devel - update to 4.18.0-553.64.1.0.1
kernel-debug-modules-extra - update to 4.18.0-553.64.1.0.1
kernel-debug-modules - update to 4.18.0-553.64.1.0.1
kernel-debug-devel - update to 4.18.0-553.64.1.0.1
kernel-debug-core - update to 4.18.0-553.64.1.0.1
kernel-debug - update to 4.18.0-553.64.1.0.1
kernel-cross-headers - update to 4.18.0-553.64.1.0.1
kernel-core - update to 4.18.0-553.64.1.0.1
kernel - update to 4.18.0-553.64.1.0.1
bpftool - update to 4.18.0-553.64.1.0.1
kernel-modules - update to 4.18.0-553.64.1.0.1
kernel-modules-extra - update to 4.18.0-553.64.1.0.1
kernel-tools - update to 4.18.0-553.64.1.0.1
kernel-tools-libs - update to 4.18.0-553.64.1.0.1
kernel-tools-libs-devel - update to 4.18.0-553.64.1.0.1
perf - update to 4.18.0-553.64.1.0.1
python3-perf - update to 4.18.0-553.64.1.0.1
kernel-abi-stablelists - update to 4.18.0-553.64.1.0.1
kernel-doc - update to 4.18.0-553.64.1.0.1
dtb-cavium - update to 5.14.21-150400.24.170.1
dtb-amazon - update to 5.14.21-150400.24.170.1
dtb-apm - update to 5.14.21-150400.24.170.1
dtb-sprd - update to 5.14.21-150400.24.170.1
dtb-amlogic - update to 5.14.21-150400.24.170.1
dtb-marvell - update to 5.14.21-150400.24.170.1
dtb-rockchip - update to 5.14.21-150400.24.170.1
dtb-socionext - update to 5.14.21-150400.24.170.1
dtb-hisilicon - update to 5.14.21-150400.24.170.1
dtb-xilinx - update to 5.14.21-150400.24.170.1
dtb-lg - update to 5.14.21-150400.24.170.1
dtb-mediatek - update to 5.14.21-150400.24.170.1
dtb-freescale - update to 5.14.21-150400.24.170.1
dtb-altera - update to 5.14.21-150400.24.170.1
dtb-allwinner - update to 5.14.21-150400.24.170.1
kernel-docs - update to 5.14.21-150400.24.170.1
dtb-broadcom - update to 5.14.21-150400.24.170.1
kernel-source - update to 5.14.21-150400.24.170.1
kernel-devel - update to 5.14.21-150400.24.170.1
dtb-aarch64 - update to 5.14.21-150400.24.170.1
dtb-qcom - update to 5.14.21-150400.24.170.1
dtb-renesas - update to 5.14.21-150400.24.170.1
dtb-amd - update to 5.14.21-150400.24.170.1
dtb-exynos - update to 5.14.21-150400.24.170.1
dtb-apple - update to 5.14.21-150400.24.170.1
kernel-syms - update to 5.14.21-150400.24.170.1
dtb-arm - update to 5.14.21-150400.24.170.1
kernel-obs-qa - update to 5.14.21-150400.24.170.1
dtb-nvidia - update to 5.14.21-150400.24.170.1
kernel-docs-html - update to 5.14.21-150400.24.170.1
kernel-macros - update to 5.14.21-150400.24.170.1
kernel-source-vanilla - update to 5.14.21-150400.24.170.1
kernel-kvmsmall-debuginfo - update to 5.14.21-150400.24.170.2
kernel-default-livepatch - addressed in versions 5.14.21-150400.24.170.2, 5.14.21-150500.55.113.1
kernel-default-debuginfo - addressed in versions 5.14.21-150400.24.170.2, 5.14.21-150500.55.113.1
kernel-default-extra - update to 5.14.21-150400.24.170.2
kernel-obs-build-debugsource - update to 5.14.21-150400.24.170.2
kernel-default-debugsource - addressed in versions 5.14.21-150400.24.170.2, 5.14.21-150500.55.113.1
ocfs2-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
cluster-md-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
kernel-default-devel - update to 5.14.21-150400.24.170.2
reiserfs-kmp-default - update to 5.14.21-150400.24.170.2
kernel-obs-build - update to 5.14.21-150400.24.170.2
gfs2-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
kselftests-kmp-default - update to 5.14.21-150400.24.170.2
kernel-default-extra-debuginfo - update to 5.14.21-150400.24.170.2
gfs2-kmp-default - update to 5.14.21-150400.24.170.2
cluster-md-kmp-default - update to 5.14.21-150400.24.170.2
ocfs2-kmp-default - update to 5.14.21-150400.24.170.2
kernel-kvmsmall-devel - update to 5.14.21-150400.24.170.2
kernel-default-optional - update to 5.14.21-150400.24.170.2
kernel-kvmsmall-devel-debuginfo - update to 5.14.21-150400.24.170.2
kernel-kvmsmall-debugsource - update to 5.14.21-150400.24.170.2
kernel-default - addressed in versions 5.14.21-150400.24.170.2, 5.14.21-150500.55.113.1
kernel-default-livepatch-devel - addressed in versions 5.14.21-150400.24.170.2, 5.14.21-150500.55.113.1
kernel-64kb-devel - update to 5.14.21-150400.24.170.2
cluster-md-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
kernel-zfcpdump - update to 5.14.21-150400.24.170.2
kernel-default-optional-debuginfo - update to 5.14.21-150400.24.170.2
kernel-64kb-extra - update to 5.14.21-150400.24.170.2
kernel-64kb-devel-debuginfo - update to 5.14.21-150400.24.170.2
kernel-zfcpdump-debugsource - update to 5.14.21-150400.24.170.2
kernel-zfcpdump-debuginfo - update to 5.14.21-150400.24.170.2
reiserfs-kmp-64kb - update to 5.14.21-150400.24.170.2
ocfs2-kmp-64kb - update to 5.14.21-150400.24.170.2
reiserfs-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
ocfs2-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
kernel-64kb-extra-debuginfo - update to 5.14.21-150400.24.170.2
kselftests-kmp-64kb - update to 5.14.21-150400.24.170.2
dlm-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
gfs2-kmp-64kb - update to 5.14.21-150400.24.170.2
dlm-kmp-64kb - update to 5.14.21-150400.24.170.2
gfs2-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
kselftests-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
dlm-kmp-default - update to 5.14.21-150400.24.170.2
reiserfs-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
dlm-kmp-default-debuginfo - update to 5.14.21-150400.24.170.2
kernel-default-devel-debuginfo - update to 5.14.21-150400.24.170.2
kernel-64kb - update to 5.14.21-150400.24.170.2
cluster-md-kmp-64kb - update to 5.14.21-150400.24.170.2
kernel-64kb-debugsource - update to 5.14.21-150400.24.170.2
kernel-64kb-optional-debuginfo - update to 5.14.21-150400.24.170.2
kernel-64kb-optional - update to 5.14.21-150400.24.170.2
kernel-kvmsmall - update to 5.14.21-150400.24.170.2
kselftests-kmp-64kb-debuginfo - update to 5.14.21-150400.24.170.2
kernel-64kb-debuginfo - update to 5.14.21-150400.24.170.2
kernel-default-base-rebuild - update to 5.14.21-150400.24.170.2.150400.24.86.2
kernel-default-base - update to 5.14.21-150400.24.170.2.150400.24.86.2

External References

Related Security Bulletins