Memory leak in Linux kernel - CVE-2021-3923

Vulnerability identifier: #VU74626

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-3923

CWE-ID: CWE-401

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due memory leak within RDMA over infiniband implementation in Linux kernel. A local user can force the application to leak memory by sensing commands to the /dev/infiniband/rdma_cm device node and gain access to sensitive information.

Linux kernel
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Availability Extension 12
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 Software Development Kit 12
SUSE CaaS Platform
SUSE Manager Proxy
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Anolis OS
SUSE Enterprise Storage
SUSE OpenStack Cloud Crowbar
SUSE OpenStack Cloud
SUSE Linux Enterprise Server 12 SP4 LTSS
SUSE Linux Enterprise Server 12 SP4 ESPOS
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Workstation Extension 12
SUSE Linux Enterprise Server 15 SP1 Business Critical Linux
SUSE Linux Enterprise Server 15 SP1 LTSS
SUSE Linux Enterprise High Performance Computing 15 SP1 LTSS
SUSE Linux Enterprise Server 15 SP2 Business Critical Linux
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Real Time Module
SUSE Linux Enterprise Server 15 SP3 Business Critical Linux
openSUSE Leap
openEuler
Dell EMC PowerProtect Data Protection
Dell Data Protection Central
Storage Protect Plus Server
EMC Cloud Tiering Appliance
kgraft-patch-4_12_14-95_125-default
kgraft-patch-4_12_14-122_156-default
kernel-livepatch-4_12_14-150100_197_142-default
kernel-livepatch-5_3_18-150200_24_148-default-debuginfo
kernel-livepatch-5_3_18-150200_24_148-default
kernel-livepatch-SLE15-SP2_Update_35-debugsource
kernel-livepatch-5_3_18-150300_59_118-default
ocfs2-kmp-rt-debuginfo
kernel-rt_debug-debuginfo
kernel-rt-base-debuginfo
kernel-rt
kernel-rt_debug
kernel-source-rt
kernel-devel-rt
gfs2-kmp-rt-debuginfo
cluster-md-kmp-rt
kernel-rt-devel
kernel-rt_debug-devel-debuginfo
kernel-rt_debug-debugsource
dlm-kmp-rt
gfs2-kmp-rt
kernel-rt-debugsource
ocfs2-kmp-rt
kernel-rt_debug-devel
kernel-rt-base
kernel-rt-devel-debuginfo
kernel-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-syms-rt
dlm-kmp-rt-debuginfo
kernel-azure-base-debuginfo
kernel-azure-debugsource
kernel-syms-azure
kernel-azure-base
kernel-azure-debuginfo
kernel-azure-devel
kernel-source-azure
kernel-devel-azure
kernel-azure
kernel-default-base-debuginfo
ocfs2-kmp-default
kernel-default-kgraft-devel
dlm-kmp-default
dlm-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
gfs2-kmp-default
cluster-md-kmp-default
kernel-devel
kernel-default-man
kernel-default-kgraft
kernel-macros
kernel-source
kernel-syms
kernel-default-debugsource
kernel-default-debuginfo
kernel-default-devel
kernel-default-devel-debuginfo
kernel-default-base
kernel-default
kernel-obs-build
kernel-docs
kernel-default-extra
kernel-default-extra-debuginfo
kernel-obs-build-debugsource
kernel-default-livepatch-devel
kernel-default-livepatch
kernel-vanilla-base-debuginfo
kernel-zfcpdump-man
kernel-kvmsmall-base
kernel-kvmsmall-base-debuginfo
kernel-vanilla-base
kernel-vanilla-debugsource
kernel-vanilla
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-vanilla-debuginfo
kernel-zfcpdump
kernel-kvmsmall
kernel-debug
kernel-debug-base-debuginfo
kernel-debug-base
kernel-vanilla-livepatch-devel
kernel-vanilla-devel
kernel-vanilla-devel-debuginfo
python2-perf
kernel
kernel-debugsource
python3-perf-debuginfo
kernel-tools
bpftool-debuginfo
kernel-tools-devel
bpftool
perf-debuginfo
kernel-debuginfo
kernel-tools-debuginfo
python2-perf-debuginfo
perf
python3-perf
kernel-debug-core
kernel-debug-modules-extra
kernel-debug-modules
kernel-debug-devel
kernel-headers
kernel-modules
kernel-modules-extra
kernel-modules-internal
kernel-tools-libs
kernel-tools-libs-devel
kernel-core
python-perf
kernel-preempt-devel
kernel-preempt-devel-debuginfo
kernel-preempt-debugsource
kernel-preempt
kernel-preempt-debuginfo
kernel-64kb
kernel-64kb-devel-debuginfo
kernel-64kb-devel
dtb-al
dtb-zte
dtb-aarch64
kernel-64kb-debuginfo
kernel-64kb-debugsource
drbd-debugsource
drbd
drbd-kmp-default
drbd-kmp-default-debuginfo

Install updates from vendor's website.

kgraft-patch-4_12_14-95_125-default - update to 1-6.5.1
kgraft-patch-4_12_14-122_156-default - update to 1-8.3.1
kernel-livepatch-4_12_14-150100_197_142-default - update to 1-150100.3.5.1
kernel-livepatch-5_3_18-150200_24_148-default-debuginfo - update to 1-150200.5.3.1
kernel-livepatch-5_3_18-150200_24_148-default - update to 1-150200.5.3.1
kernel-livepatch-SLE15-SP2_Update_35-debugsource - update to 1-150200.5.3.1
kernel-livepatch-5_3_18-150300_59_118-default - update to 1-150300.7.3.1
ocfs2-kmp-rt-debuginfo - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-rt_debug-debuginfo - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-rt-base-debuginfo - update to 4.12.14-10.121.1
kernel-rt - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-rt_debug - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-source-rt - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-devel-rt - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
gfs2-kmp-rt-debuginfo - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
cluster-md-kmp-rt - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-rt-devel - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-rt_debug-devel-debuginfo - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-rt_debug-debugsource - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
dlm-kmp-rt - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
gfs2-kmp-rt - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-rt-debugsource - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
ocfs2-kmp-rt - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-rt_debug-devel - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-rt-base - update to 4.12.14-10.121.1
kernel-rt-devel-debuginfo - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-rt-debuginfo - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
cluster-md-kmp-rt-debuginfo - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-syms-rt - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
dlm-kmp-rt-debuginfo - addressed in versions 4.12.14-10.121.1, 5.3.18-150300.124.1
kernel-azure-base-debuginfo - update to 4.12.14-16.130.1
kernel-azure-debugsource - update to 4.12.14-16.130.1
kernel-syms-azure - update to 4.12.14-16.130.1
kernel-azure-base - update to 4.12.14-16.130.1
kernel-azure-debuginfo - update to 4.12.14-16.130.1
kernel-azure-devel - update to 4.12.14-16.130.1
kernel-source-azure - update to 4.12.14-16.130.1
kernel-devel-azure - update to 4.12.14-16.130.1
kernel-azure - update to 4.12.14-16.130.1
kernel-default-base-debuginfo - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1
ocfs2-kmp-default - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-default-kgraft-devel - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1
dlm-kmp-default - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
gfs2-kmp-default - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
cluster-md-kmp-default - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-devel - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-default-man - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1
kernel-default-kgraft - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1
kernel-macros - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-source - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-syms - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-default-debugsource - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-default-debuginfo - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-default-devel - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-default-base - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1.150200.9.71.1, 5.3.18-150300.59.118.1.150300.18.68.1
kernel-default - addressed in versions 4.12.14-95.125.1, 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-obs-build - addressed in versions 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-docs - addressed in versions 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-default-extra - update to 4.12.14-122.156.1
kernel-default-extra-debuginfo - update to 4.12.14-122.156.1
kernel-obs-build-debugsource - addressed in versions 4.12.14-122.156.1, 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-default-livepatch-devel - addressed in versions 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-default-livepatch - addressed in versions 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-vanilla-base-debuginfo - update to 4.12.14-150100.197.142.1
kernel-zfcpdump-man - update to 4.12.14-150100.197.142.1
kernel-kvmsmall-base - update to 4.12.14-150100.197.142.1
kernel-kvmsmall-base-debuginfo - update to 4.12.14-150100.197.142.1
kernel-vanilla-base - update to 4.12.14-150100.197.142.1
kernel-vanilla-debugsource - update to 4.12.14-150100.197.142.1
kernel-vanilla - update to 4.12.14-150100.197.142.1
kernel-zfcpdump-debuginfo - addressed in versions 4.12.14-150100.197.142.1, 5.3.18-150300.59.118.1
kernel-zfcpdump-debugsource - addressed in versions 4.12.14-150100.197.142.1, 5.3.18-150300.59.118.1
reiserfs-kmp-default-debuginfo - addressed in versions 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
reiserfs-kmp-default - addressed in versions 4.12.14-150100.197.142.1, 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-vanilla-debuginfo - update to 4.12.14-150100.197.142.1
kernel-zfcpdump - addressed in versions 4.12.14-150100.197.142.1, 5.3.18-150300.59.118.1
kernel-kvmsmall - update to 4.12.14-150100.197.142.1
kernel-debug - update to 4.12.14-150100.197.142.1
kernel-debug-base-debuginfo - update to 4.12.14-150100.197.142.1
kernel-debug-base - update to 4.12.14-150100.197.142.1
kernel-vanilla-livepatch-devel - update to 4.12.14-150100.197.142.1
kernel-vanilla-devel - update to 4.12.14-150100.197.142.1
kernel-vanilla-devel-debuginfo - update to 4.12.14-150100.197.142.1
python2-perf - update to 4.19.90-2304.3.0.0197
kernel - update to 4.19.90-2304.3.0.0197
kernel-debugsource - update to 4.19.90-2304.3.0.0197
python3-perf-debuginfo - update to 4.19.90-2304.3.0.0197
kernel-tools - update to 4.19.90-2304.3.0.0197
bpftool-debuginfo - update to 4.19.90-2304.3.0.0197
kernel-tools-devel - update to 4.19.90-2304.3.0.0197
kernel-devel - update to 4.19.90-2304.3.0.0197
bpftool - update to 4.19.90-2304.3.0.0197
perf-debuginfo - update to 4.19.90-2304.3.0.0197
kernel-debuginfo - update to 4.19.90-2304.3.0.0197
kernel-tools-debuginfo - update to 4.19.90-2304.3.0.0197
kernel-source - update to 4.19.90-2304.3.0.0197
python2-perf-debuginfo - update to 4.19.90-2304.3.0.0197
perf - update to 4.19.90-2304.3.0.0197
python3-perf - update to 4.19.90-2304.3.0.0197
kernel-debug-core - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-debug-modules-extra - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-debug-modules - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-debug-devel - addressed in versions 4.19.91-27.2, 4.19.91-28
python3-perf - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-devel - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-headers - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-modules - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-modules-extra - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-modules-internal - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-tools - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-tools-libs - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-tools-libs-devel - addressed in versions 4.19.91-27.2, 4.19.91-28
perf - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-debug - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-core - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel - addressed in versions 4.19.91-27.2, 4.19.91-28
bpftool - addressed in versions 4.19.91-27.2, 4.19.91-28
python-perf - addressed in versions 4.19.91-27.2, 4.19.91-28
kernel-preempt-devel - addressed in versions 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-preempt-devel-debuginfo - addressed in versions 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-preempt-debugsource - addressed in versions 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-preempt - addressed in versions 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-preempt-debuginfo - addressed in versions 5.3.18-150200.24.148.1, 5.3.18-150300.59.118.1
kernel-64kb - update to 5.3.18-150300.59.118.1
kernel-64kb-devel-debuginfo - update to 5.3.18-150300.59.118.1
kernel-64kb-devel - update to 5.3.18-150300.59.118.1
dtb-al - update to 5.3.18-150300.59.118.1
dtb-zte - update to 5.3.18-150300.59.118.1
dtb-aarch64 - update to 5.3.18-150300.59.118.1
kernel-64kb-debuginfo - update to 5.3.18-150300.59.118.1
kernel-64kb-debugsource - update to 5.3.18-150300.59.118.1
drbd-debugsource - update to 9.0.14+git.62f906cf-4.26.2
drbd - update to 9.0.14+git.62f906cf-4.26.2
drbd-kmp-default - update to 9.0.14+git.62f906cf_k4.12.14_95.125-4.26.2
drbd-kmp-default-debuginfo - update to 9.0.14+git.62f906cf_k4.12.14_95.125-4.26.2
Storage Protect Plus Server - update to 10.1.16.1
EMC Cloud Tiering Appliance - addressed in versions 13.1.0.2.33, 13.2.0.2.22

• https://bugzilla.redhat.com/show_bug.cgi?id=2019643
• https://lore.kernel.org/all/20220204100036.GA12348@kili/

• Information disclosure in Linux kernel RDMA over infiniband
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Multiple vulnerabilities in Dell Cloud Tiering Appliance
• Multiple vulnerabilities in Dell Data Protection Central
• Multiple vulnerabilities in Dell Cloud Tiering Appliance
• openEuler 20.03 LTS SP1 update for kernel
• openEuler 20.03 LTS SP3 update for kernel
• Multiple vulnerabilities in IBM Storage Protect Plus Server
• Anolis OS update for kernel
• Anolis OS update for kernel
• Anolis OS update for kernel
• Anolis OS update for kernel