NULL pointer dereference in Linux kernel - CVE-2022-50405

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Main Vulnerability Database Vulnerabilities #VU115920

NULL pointer dereference in Linux kernel - CVE-2022-50405

Published: September 19, 2025 / Updated: September 22, 2025


Vulnerability identifier: #VU115920
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-2022-50405
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 EXPORT_SYMBOL_GPL() function in net/ipv4/udp_tunnel.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Live Patching
openEuler
kgraft-patch-4_12_14-122_275-default
kernel-macros
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-default-devel-debuginfo
kernel-default-man
kernel-default
dlm-kmp-default-debuginfo
kernel-default-base-debuginfo
kernel-default-debugsource
kernel-default-devel
cluster-md-kmp-default-debuginfo
kernel-syms
kernel-default-base
kernel-source
kernel-devel
ocfs2-kmp-default
gfs2-kmp-default-debuginfo
cluster-md-kmp-default
dlm-kmp-default
ocfs2-kmp-default-debuginfo
kernel-default-debuginfo
gfs2-kmp-default
python3-perf-debuginfo
python3-perf
python2-perf-debuginfo
python2-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel

How to mitigate CVE-2022-50405

Install update from vendor's repository.

Linux kernel - update to 4.9.337
kgraft-patch-4_12_14-122_275-default - update to 1-8.3.1
kernel-macros - update to 4.12.14-122.275.1
kernel-default-kgraft - update to 4.12.14-122.275.1
kernel-default-kgraft-devel - update to 4.12.14-122.275.1
kernel-default-devel-debuginfo - update to 4.12.14-122.275.1
kernel-default-man - update to 4.12.14-122.275.1
kernel-default - update to 4.12.14-122.275.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.275.1
kernel-default-base-debuginfo - update to 4.12.14-122.275.1
kernel-default-debugsource - update to 4.12.14-122.275.1
kernel-default-devel - update to 4.12.14-122.275.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.275.1
kernel-syms - update to 4.12.14-122.275.1
kernel-default-base - update to 4.12.14-122.275.1
kernel-source - update to 4.12.14-122.275.1
kernel-devel - update to 4.12.14-122.275.1
ocfs2-kmp-default - update to 4.12.14-122.275.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.275.1
cluster-md-kmp-default - update to 4.12.14-122.275.1
dlm-kmp-default - update to 4.12.14-122.275.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.275.1
kernel-default-debuginfo - update to 4.12.14-122.275.1
gfs2-kmp-default - update to 4.12.14-122.275.1
python3-perf-debuginfo - update to 4.19.90-2510.4.0.0349
python3-perf - update to 4.19.90-2510.4.0.0349
python2-perf-debuginfo - update to 4.19.90-2510.4.0.0349
python2-perf - update to 4.19.90-2510.4.0.0349
perf-debuginfo - update to 4.19.90-2510.4.0.0349
perf - update to 4.19.90-2510.4.0.0349
kernel-tools-devel - update to 4.19.90-2510.4.0.0349
kernel-tools-debuginfo - update to 4.19.90-2510.4.0.0349
kernel-tools - update to 4.19.90-2510.4.0.0349
kernel-source - update to 4.19.90-2510.4.0.0349
kernel-devel - update to 4.19.90-2510.4.0.0349
kernel-debugsource - update to 4.19.90-2510.4.0.0349
kernel-debuginfo - update to 4.19.90-2510.4.0.0349
bpftool-debuginfo - update to 4.19.90-2510.4.0.0349
bpftool - update to 4.19.90-2510.4.0.0349
kernel - update to 4.19.90-2510.4.0.0349

External References

Related Security Bulletins