NULL pointer dereference in Linux kernel - CVE-2021-47257

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Main Vulnerability Database Vulnerabilities #VU93262

NULL pointer dereference in Linux kernel - CVE-2021-47257

Published: June 25, 2024 / Updated: May 13, 2025


Vulnerability identifier: #VU93262
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2021-47257
CWE-ID: CWE-476
Exploitation vector: Local access
Exploit availability: No public exploit available
Affected software:
Linux kernel
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise High Availability Extension 12
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Anolis OS
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
SUSE Linux Enterprise Workstation Extension 12
SUSE Linux Enterprise Live Patching
openEuler
Technical Support Appliance
Robotic Process Automation for Cloud Pak
RecoverPoint for Virtual Machines
IBM Qradar SIEM
Juniper Secure Analytics (JSA)
kgraft-patch-4_12_14-122_228-default
kernel-rt-devel
kernel-rt-debugsource
gfs2-kmp-rt
kernel-rt_debug-devel-debuginfo
kernel-syms-rt
kernel-rt-base
gfs2-kmp-rt-debuginfo
kernel-rt-debuginfo
kernel-rt_debug-debuginfo
cluster-md-kmp-rt
dlm-kmp-rt
kernel-source-rt
kernel-rt-base-debuginfo
kernel-rt_debug-debugsource
ocfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-rt_debug-devel
kernel-rt-devel-debuginfo
dlm-kmp-rt-debuginfo
kernel-devel-rt
cluster-md-kmp-rt-debuginfo
kernel-rt
kernel-rt_debug
kernel-source-azure
kernel-azure
kernel-azure-base
kernel-azure-devel
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-syms-azure
kernel-azure-base-debuginfo
kernel-devel-azure
kernel-default-extra
dlm-kmp-default
cluster-md-kmp-default
ocfs2-kmp-default-debuginfo
kernel-default-base-debuginfo
dlm-kmp-default-debuginfo
kernel-default-debugsource
gfs2-kmp-default
kernel-default
kernel-devel
kernel-macros
kernel-source
kernel-default-devel-debuginfo
kernel-default-kgraft-devel
kernel-default-kgraft
kernel-default-man
kernel-default-base
kernel-default-debuginfo
ocfs2-kmp-default
gfs2-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-devel
kernel-syms
kernel-default-extra-debuginfo
kernel-obs-build
kernel-obs-build-debugsource
kernel-docs
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-core
kernel-cross-headers
kernel-debug
kernel
bpftool
kernel-debug-core
kernel-debug-devel
kernel-debug-modules
kernel-debug-modules-extra
kernel-headers
kernel-modules
kernel-modules-extra
kernel-tools
kernel-tools-libs
kernel-tools-libs-devel
perf
python3-perf
kernel-abi-stablelists
kernel-doc
kernel-debugsource
python2-perf-debuginfo
kernel-tools-devel
perf-debuginfo
python3-perf-debuginfo
kernel-tools-debuginfo
python2-perf
kernel-debuginfo
bpftool-debuginfo
Red Hat OpenShift Container Platform
Session Smart Router

Detailed vulnerability description

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

The vulnerability exists due to NULL pointer dereference within the ieee802154_llsec_parse_dev_addr() function in net/ieee802154/nl802154.c. A local user can perform a denial of service (DoS) attack.


How to mitigate CVE-2021-47257

Install update from vendor's website.

Sources