NULL pointer dereference in Linux kernel - CVE-2023-6915

Vulnerability identifier: #VU85423

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-2023-6915

CWE-ID: CWE-476

Exploitation vector: Local access

Exploit availability: No public exploit available

Affected software:
Linux kernel
Amazon Linux AMI
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 High Performance Computing LTSS 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Manager Retail Branch Server
SUSE Manager Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
openSUSE Leap Micro
SUSE Enterprise Storage
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Real Time
Anolis OS
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Ubuntu
Slackware Linux
SUSE Linux Enterprise High Performance Computing 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 LTSS
SUSE Linux Enterprise Server 15 SP2 Business Critical Linux
SUSE Linux Enterprise Live Patching
SUSE Linux Enterprise Server 15 SP3 LTSS
SUSE Linux Enterprise Server 15 SP3 Business Critical Linux
SUSE Linux Enterprise Server 15 SP4 LTSS
SUSE Linux Enterprise Desktop 15 SP4 LTSS
Legacy Module
Public Cloud Module
Development Tools Module
Basesystem Module
SUSE Real Time Module
openSUSE Leap
openEuler
Fedora
Juniper Secure Analytics (JSA)
linux-image-kvm (Ubuntu package)
linux-image-4.15.0-1151-kvm (Ubuntu package)
linux-image-4.15.0-1161-gcp (Ubuntu package)
linux-image-virtual-hwe-16.04 (Ubuntu package)
linux-image-4.15.0-1167-aws (Ubuntu package)
linux-image-4.15.0-1176-azure (Ubuntu package)
linux-image-4.15.0-224-generic (Ubuntu package)
linux-image-4.15.0-224-lowlatency (Ubuntu package)
linux-image-aws-lts-18.04 (Ubuntu package)
linux-image-azure-lts-18.04 (Ubuntu package)
linux-image-gcp-lts-18.04 (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-5.4.0-172-lowlatency (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-oracle-lts-18.04 (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-aws-hwe (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-generic-hwe-16.04 (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-lowlatency-hwe-16.04 (Ubuntu package)
linux-image-oem (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-raspi-hwe-18.04 (Ubuntu package)
linux-image-oem-osp1 (Ubuntu package)
linux-image-5.4.0-1066-ibm (Ubuntu package)
linux-image-snapdragon-hwe-18.04 (Ubuntu package)
linux-image-virtual-hwe-18.04 (Ubuntu package)
linux-image-5.4.0-1124-azure (Ubuntu package)
linux-image-5.4.0-1103-raspi (Ubuntu package)
linux-image-lowlatency-hwe-18.04 (Ubuntu package)
linux-image-5.4.0-1118-oracle (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-5.4.0-1119-aws (Ubuntu package)
linux-image-generic-hwe-18.04 (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-4.15.0-1130-oracle (Ubuntu package)
linux-image-5.4.0-172-generic (Ubuntu package)
kernel-livepatch-5_3_18-150200_24_178-default
kernel-livepatch-SLE15-SP2_Update_45-debugsource
kernel-livepatch-5_3_18-150200_24_178-default-debuginfo
kernel-livepatch-5_3_18-150300_59_150-preempt-debuginfo
kernel-livepatch-5_3_18-150300_59_150-preempt
kernel-livepatch-SLE15-SP3_Update_41-debugsource
kernel-livepatch-5_3_18-150300_59_150-default-debuginfo
kernel-livepatch-5_3_18-150300_59_150-default
kernel-livepatch-SLE15-SP4-RT_Update_18-debugsource
kernel-livepatch-5_14_21-150400_15_68-rt
kernel-livepatch-5_14_21-150400_15_68-rt-debuginfo
kernel-livepatch-5_14_21-150400_24_108-default
kernel-livepatch-SLE15-SP4_Update_23-debugsource
kernel-livepatch-5_14_21-150400_24_108-default-debuginfo
kernel-livepatch-5_14_21-150500_13_35-rt
kernel-livepatch-SLE15-SP5-RT_Update_10-debugsource
kernel-livepatch-SLE15-SP5_Update_10-debugsource
kernel-livepatch-5_14_21-150500_55_49-default
kernel-livepatch-5_14_21-150500_55_49-default-debuginfo
kernel-livepatch-5_14_21-150500_13_35-rt-debuginfo
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-headers
kernel-tools-libs
kernel-tools
kernel-modules-extra
kernel-modules
kernel-devel
perf
kernel-tools-libs-devel
bpftool
kernel
kernel-core
python3-perf
kernel-abi-stablelists
kernel-doc
kernel-cross-headers
kernel-debug
kernel-debug-core
kernel-debug-devel
kernel-debug-modules
kernel-debug-modules-extra
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
ocfs2-kmp-default-debuginfo
dlm-kmp-default-debuginfo
cluster-md-kmp-default
cluster-md-kmp-default-debuginfo
kernel-default-livepatch
kernel-default-debugsource
kernel-default-livepatch-devel
kernel-default-debuginfo
kernel-default
dlm-kmp-default
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-docs
kernel-macros
kernel-source
kernel-default-devel-debuginfo
kernel-syms
kernel-preempt-debugsource
kernel-preempt-devel
kernel-preempt-debuginfo
kernel-default-devel
kernel-preempt-devel-debuginfo
kernel-obs-build
kernel-obs-build-debugsource
kernel-preempt
gfs2-kmp-default
kernel-default-base
ocfs2-kmp-64kb
kselftests-kmp-64kb
ocfs2-kmp-64kb-debuginfo
dtb-exynos
dtb-arm
dtb-zte
dtb-allwinner
dtb-hisilicon
dtb-socionext
dtb-sprd
dtb-apm
reiserfs-kmp-64kb
dtb-lg
dtb-cavium
dlm-kmp-64kb-debuginfo
kselftests-kmp-64kb-debuginfo
dtb-al
cluster-md-kmp-64kb
dtb-broadcom
dtb-marvell
gfs2-kmp-64kb-debuginfo
dtb-qcom
kernel-64kb-optional-debuginfo
dlm-kmp-64kb
kernel-64kb-optional
kernel-kvmsmall-debugsource
kernel-source-vanilla
kernel-docs-html
kernel-kvmsmall
kernel-debug-devel-debuginfo
kernel-debug-debugsource
kernel-debug-debuginfo
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-devel
kernel-debug-livepatch-devel
kernel-default-optional
kernel-64kb
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-64kb-devel
kernel-64kb-devel-debuginfo
dtb-altera
cluster-md-kmp-64kb-debuginfo
ocfs2-kmp-preempt
cluster-md-kmp-preempt-debuginfo
dlm-kmp-preempt
kselftests-kmp-preempt-debuginfo
ocfs2-kmp-preempt-debuginfo
kernel-zfcpdump
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
dtb-aarch64
kernel-64kb-extra
reiserfs-kmp-64kb-debuginfo
reiserfs-kmp-preempt-debuginfo
dtb-freescale
dtb-nvidia
kernel-64kb-extra-debuginfo
kernel-64kb-livepatch-devel
dtb-rockchip
dtb-renesas
dtb-mediatek
dtb-amd
dtb-xilinx
dtb-amlogic
gfs2-kmp-64kb
kernel-preempt-optional-debuginfo
kernel-default-optional-debuginfo
kernel-default-extra
kselftests-kmp-default
kernel-obs-qa
kernel-default-extra-debuginfo
cluster-md-kmp-preempt
kselftests-kmp-default-debuginfo
kernel-preempt-extra
kselftests-kmp-preempt
kernel-preempt-extra-debuginfo
kernel-preempt-optional
kernel-preempt-livepatch-devel
gfs2-kmp-preempt-debuginfo
dlm-kmp-preempt-debuginfo
reiserfs-kmp-preempt
gfs2-kmp-preempt
kernel-default-base-rebuild
kernel-rt-debuginfo
kernel-rt
kernel-rt-debugsource
linux-image-generic-lpae (Ubuntu package)
linux-image-5.4.0-172-generic-lpae (Ubuntu package)
linux-image-5.4.0-1031-iot (Ubuntu package)
linux-image-xilinx-zynqmp (Ubuntu package)
linux-image-5.4.0-1038-xilinx-zynqmp (Ubuntu package)
linux-image-ibm-lts-20.04 (Ubuntu package)
linux-image-bluefield (Ubuntu package)
linux-image-5.4.0-1079-bluefield (Ubuntu package)
linux-image-gkeop (Ubuntu package)
linux-image-gkeop-5.4 (Ubuntu package)
linux-image-5.4.0-1086-gkeop (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-raspi2 (Ubuntu package)
linux-image-5.4.0-1107-kvm (Ubuntu package)
linux-image-oracle-lts-20.04 (Ubuntu package)
linux-image-aws-lts-20.04 (Ubuntu package)
linux-image-gcp-lts-20.04 (Ubuntu package)
linux-image-5.4.0-1123-gcp (Ubuntu package)
linux-image-azure-lts-20.04 (Ubuntu package)
bpftool-debuginfo
kernel-debugsource
kernel-debuginfo
kernel-tools-debuginfo
python3-perf-debuginfo
kernel-tools-devel
perf-debuginfo
kernel-modules-internal
dtb-amazon
dtb-apple
ocfs2-kmp-rt
kernel-rt-devel-debuginfo
kernel-rt-devel
kernel-rt_debug
kernel-rt-optional
kernel-rt-extra
kernel-rt-vdso-debuginfo
kernel-source-rt
kernel-rt-extra-debuginfo
kernel-syms-rt
cluster-md-kmp-rt-debuginfo
kernel-rt_debug-devel
kernel-rt_debug-livepatch-devel
dlm-kmp-rt-debuginfo
kernel-rt-vdso
kselftests-kmp-rt
gfs2-kmp-rt-debuginfo
kernel-rt_debug-devel-debuginfo
kernel-rt_debug-debugsource
kernel-rt_debug-debuginfo
ocfs2-kmp-rt-debuginfo
reiserfs-kmp-rt
kernel-rt-optional-debuginfo
kernel-rt-livepatch
reiserfs-kmp-rt-debuginfo
gfs2-kmp-rt
dlm-kmp-rt
kernel-rt_debug-vdso
cluster-md-kmp-rt
kernel-rt-livepatch-devel
kernel-rt_debug-vdso-debuginfo
kselftests-kmp-rt-debuginfo
kernel-devel-rt
gfs2-kmp-azure-debuginfo
reiserfs-kmp-azure
kernel-azure-extra-debuginfo
kselftests-kmp-azure-debuginfo
kernel-azure-debugsource
kernel-syms-azure
kernel-azure-optional
kselftests-kmp-azure
cluster-md-kmp-azure
kernel-azure-devel-debuginfo
reiserfs-kmp-azure-debuginfo
kernel-azure-devel
kernel-azure-extra
cluster-md-kmp-azure-debuginfo
kernel-azure-livepatch-devel
dlm-kmp-azure
kernel-azure
kernel-azure-vdso-debuginfo
kernel-azure-vdso
kernel-devel-azure
kernel-source-azure
ocfs2-kmp-azure-debuginfo
ocfs2-kmp-azure
dlm-kmp-azure-debuginfo
gfs2-kmp-azure
kernel-azure-optional-debuginfo
kernel-azure-debuginfo
kernel-debug-vdso
kernel-kvmsmall-vdso
kernel-debug-vdso-debuginfo
kernel-default-vdso-debuginfo
kernel-default-vdso
kernel-kvmsmall-vdso-debuginfo
linux-image-generic-64k (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-5.15.0-97-generic-64k (Ubuntu package)
linux-image-5.15.0-97-generic (Ubuntu package)
linux-image-5.15.0-97-generic-lpae (Ubuntu package)
linux-image-5.15.0-97-lowlatency-64k (Ubuntu package)
linux-image-5.15.0-97-lowlatency (Ubuntu package)
linux-image-lowlatency-64k-hwe-20.04 (Ubuntu package)
linux-image-lowlatency-hwe-20.04 (Ubuntu package)
linux-image-generic-hwe-20.04 (Ubuntu package)
linux-image-generic-64k-hwe-20.04 (Ubuntu package)
linux-image-generic-lpae-hwe-20.04 (Ubuntu package)
linux-image-oem-20.04b (Ubuntu package)
linux-image-oem-20.04c (Ubuntu package)
linux-image-oem-20.04d (Ubuntu package)
linux-image-virtual-hwe-20.04 (Ubuntu package)
linux-image-oem-20.04 (Ubuntu package)
linux-image-gkeop-5.15 (Ubuntu package)
linux-image-5.15.0-1037-gkeop (Ubuntu package)
linux-image-5.15.0-1045-nvidia (Ubuntu package)
linux-image-5.15.0-1045-nvidia-lowlatency (Ubuntu package)
linux-image-nvidia-lowlatency (Ubuntu package)
linux-image-nvidia (Ubuntu package)
linux-image-raspi-nolpae (Ubuntu package)
linux-image-5.15.0-1047-ibm (Ubuntu package)
linux-image-5.15.0-1047-raspi (Ubuntu package)
linux-image-5.15.0-1049-intel-iotg (Ubuntu package)
linux-image-gke-5.15 (Ubuntu package)
linux-image-5.15.0-1051-gke (Ubuntu package)
linux-image-5.15.0-1051-kvm (Ubuntu package)
linux-image-oracle-lts-22.04 (Ubuntu package)
linux-image-gcp-lts-22.04 (Ubuntu package)
linux-image-5.15.0-1052-oracle (Ubuntu package)
linux-image-5.15.0-1052-gcp (Ubuntu package)
linux-image-aws-lts-22.04 (Ubuntu package)
linux-image-5.15.0-1055-aws (Ubuntu package)
linux-image-azure-lts-22.04 (Ubuntu package)
linux-image-5.15.0-1057-azure (Ubuntu package)
linux-image-5.15.0-1057-azure-fde (Ubuntu package)
linux-image-azure-cvm (Ubuntu package)
linux-image-azure-fde-lts-22.04 (Ubuntu package)
linux-5.15.160/kernel-modules
linux-5.15.160/kernel-huge
linux-5.15.160/kernel-generic
linux-5.15.160/kernel-headers
linux-image-6.1.0-1034-oem (Ubuntu package)
linux-image-oem-22.04b (Ubuntu package)
linux-image-oem-22.04c (Ubuntu package)
linux-image-oem-22.04a (Ubuntu package)
linux-image-oem-22.04 (Ubuntu package)
linux-image-6.5.0-21-lowlatency (Ubuntu package)
linux-image-6.5.0-21-lowlatency-64k (Ubuntu package)
linux-image-lowlatency-hwe-22.04 (Ubuntu package)
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package)
linux-image-6.5.0-21-generic (Ubuntu package)
linux-image-6.5.0-21-generic-64k (Ubuntu package)
linux-image-generic-64k-hwe-22.04 (Ubuntu package)
linux-image-virtual-hwe-22.04 (Ubuntu package)
linux-image-generic-hwe-22.04 (Ubuntu package)
linux-image-6.5.0-1008-starfive (Ubuntu package)
linux-image-starfive (Ubuntu package)
linux-image-6.5.0-1010-laptop (Ubuntu package)
linux-image-laptop-23.10 (Ubuntu package)
linux-image-6.5.0-1011-raspi (Ubuntu package)
linux-image-6.5.0-1014-aws (Ubuntu package)
linux-image-6.5.0-1014-gcp (Ubuntu package)
linux-image-6.5.0-1015-azure-fde (Ubuntu package)
linux-image-6.5.0-1015-azure (Ubuntu package)
linux-image-6.5.0-1015-oem (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-oem-22.04d (Ubuntu package)
linux-image-6.5.0-1016-oracle (Ubuntu package)
Storage Copy Data Management
Technical Support Appliance
IBM Cloud Pak for Watson AIOps
Storage Protect Plus Server
EMC Cloud Tiering Appliance
linux-image-intel-iotg (Ubuntu package)
linux-image-intel (Ubuntu package)
IBM Storage Scale System
IBM Qradar SIEM

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

The vulnerability exists due to a NULL pointer dereference error within the ida_free() function in lib/idr.c. A local user can pass specially crafted data to the system and perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://access.redhat.com/security/cve/CVE-2023-6915
• https://bugzilla.redhat.com/show_bug.cgi?id=2254982
• https://github.com/torvalds/linux/commit/af73483f4e8b6f5c68c9aa63257bdd929a9c194a