Memory leak in Linux kernel - CVE-2021-47250

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Main Vulnerability Database Vulnerabilities #VU89951

Memory leak in Linux kernel - CVE-2021-47250

Published: May 30, 2024 / Updated: May 14, 2025


Vulnerability identifier: #VU89951
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-2021-47250
CWE-ID: CWE-401
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 memory leak within the cipso_v4_doi_free() function in net/ipv4/cipso_ipv4.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise High Availability Extension 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Workstation Extension 12
kgraft-patch-4_12_14-122_219-default
ocfs2-kmp-rt
kernel-rt-base-debuginfo
kernel-rt-base
kernel-rt-devel-debuginfo
kernel-rt-debuginfo
gfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-syms-rt
kernel-rt_debug-devel-debuginfo
cluster-md-kmp-rt
dlm-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt_debug-debugsource
kernel-rt-debugsource
kernel-rt-devel
gfs2-kmp-rt-debuginfo
dlm-kmp-rt
kernel-rt_debug-debuginfo
kernel-rt_debug-devel
kernel-devel-rt
kernel-source-rt
kernel-rt
kernel-rt_debug
kernel-azure-base
kernel-devel-azure
kernel-azure-debugsource
kernel-azure-base-debuginfo
kernel-azure-devel
kernel-azure-debuginfo
kernel-syms-azure
kernel-source-azure
kernel-azure
kernel-macros
ocfs2-kmp-default-debuginfo
kernel-source
kernel-devel
kernel-default-devel-debuginfo
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-docs
kernel-obs-build
kernel-obs-build-debugsource
kernel-default-man
kernel-default-extra-debuginfo
kernel-default-extra
kernel-default
gfs2-kmp-default
kernel-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-devel
dlm-kmp-default
kernel-default-debugsource
cluster-md-kmp-default
kernel-syms
dlm-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
kernel-default-base
kernel-default-base-debuginfo
Dell Secure Connect Gateway

How to mitigate CVE-2021-47250

Install update from vendor's website.

Linux kernel - addressed in versions 4.4.274, 4.9.274, 4.14.238, 4.19.196, 5.4.128, 5.10.46, 5.12.13, 5.13
kgraft-patch-4_12_14-122_219-default - update to 1-8.3.1
ocfs2-kmp-rt - update to 4.12.14-10.188.1
kernel-rt-base-debuginfo - update to 4.12.14-10.188.1
kernel-rt-base - update to 4.12.14-10.188.1
kernel-rt-devel-debuginfo - update to 4.12.14-10.188.1
kernel-rt-debuginfo - update to 4.12.14-10.188.1
gfs2-kmp-rt - update to 4.12.14-10.188.1
ocfs2-kmp-rt-debuginfo - update to 4.12.14-10.188.1
kernel-syms-rt - update to 4.12.14-10.188.1
kernel-rt_debug-devel-debuginfo - update to 4.12.14-10.188.1
cluster-md-kmp-rt - update to 4.12.14-10.188.1
dlm-kmp-rt-debuginfo - update to 4.12.14-10.188.1
cluster-md-kmp-rt-debuginfo - update to 4.12.14-10.188.1
kernel-rt_debug-debugsource - update to 4.12.14-10.188.1
kernel-rt-debugsource - update to 4.12.14-10.188.1
kernel-rt-devel - update to 4.12.14-10.188.1
gfs2-kmp-rt-debuginfo - update to 4.12.14-10.188.1
dlm-kmp-rt - update to 4.12.14-10.188.1
kernel-rt_debug-debuginfo - update to 4.12.14-10.188.1
kernel-rt_debug-devel - update to 4.12.14-10.188.1
kernel-devel-rt - update to 4.12.14-10.188.1
kernel-source-rt - update to 4.12.14-10.188.1
kernel-rt - update to 4.12.14-10.188.1
kernel-rt_debug - update to 4.12.14-10.188.1
kernel-azure-base - update to 4.12.14-16.188.1
kernel-devel-azure - update to 4.12.14-16.188.1
kernel-azure-debugsource - update to 4.12.14-16.188.1
kernel-azure-base-debuginfo - update to 4.12.14-16.188.1
kernel-azure-devel - update to 4.12.14-16.188.1
kernel-azure-debuginfo - update to 4.12.14-16.188.1
kernel-syms-azure - update to 4.12.14-16.188.1
kernel-source-azure - update to 4.12.14-16.188.1
kernel-azure - update to 4.12.14-16.188.1
kernel-macros - update to 4.12.14-122.219.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.219.1
kernel-source - update to 4.12.14-122.219.1
kernel-devel - update to 4.12.14-122.219.1
kernel-default-devel-debuginfo - update to 4.12.14-122.219.1
kernel-default-kgraft - update to 4.12.14-122.219.1
kernel-default-kgraft-devel - update to 4.12.14-122.219.1
kernel-docs - update to 4.12.14-122.219.1
kernel-obs-build - update to 4.12.14-122.219.1
kernel-obs-build-debugsource - update to 4.12.14-122.219.1
kernel-default-man - update to 4.12.14-122.219.1
kernel-default-extra-debuginfo - update to 4.12.14-122.219.1
kernel-default-extra - update to 4.12.14-122.219.1
kernel-default - update to 4.12.14-122.219.1
gfs2-kmp-default - update to 4.12.14-122.219.1
kernel-default-debuginfo - update to 4.12.14-122.219.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.219.1
kernel-default-devel - update to 4.12.14-122.219.1
dlm-kmp-default - update to 4.12.14-122.219.1
kernel-default-debugsource - update to 4.12.14-122.219.1
cluster-md-kmp-default - update to 4.12.14-122.219.1
kernel-syms - update to 4.12.14-122.219.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.219.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.219.1
ocfs2-kmp-default - update to 4.12.14-122.219.1
kernel-default-base - update to 4.12.14-122.219.1
kernel-default-base-debuginfo - update to 4.12.14-122.219.1
Dell Secure Connect Gateway - update to 5.26.00.18

External References

Related Security Bulletins