Improper locking in Linux kernel - CVE-2024-40966

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Main Vulnerability Database Vulnerabilities #VU94275

Improper locking in Linux kernel - CVE-2024-40966

Published: July 13, 2024 / Updated: May 13, 2025


Vulnerability identifier: #VU94275
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-2024-40966
CWE-ID: CWE-667
Exploitation vector: Local access
Exploit availability: No public exploit available
Affected software:
Linux kernel
Debian Linux
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise High Availability Extension 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Software Development Kit 12
SUSE Linux Enterprise Real Time 12
SUSE Linux Enterprise Micro
openSUSE Leap Micro
SUSE Linux Enterprise Workstation Extension 12
SUSE Linux Enterprise Live Patching
Development Tools Module
Legacy Module
Basesystem Module
Public Cloud Module
SUSE Real Time Module
openSUSE Leap
openEuler
Ubuntu
RecoverPoint for Virtual Machines
IBM DataPower Gateway
kgraft-patch-4_12_14-122_225-default
kernel-livepatch-SLE15-SP5-RT_Update_18-debugsource
kernel-livepatch-5_14_21-150500_13_64-rt-debuginfo
kernel-livepatch-5_14_21-150500_13_64-rt
kernel-livepatch-5_14_21-150500_55_73-default-debuginfo
kernel-livepatch-5_14_21-150500_55_73-default
kernel-livepatch-SLE15-SP5_Update_17-debugsource
kernel-livepatch-SLE15-SP6-RT_Update_1-debugsource
kernel-livepatch-6_4_0-150600_10_5-rt
kernel-livepatch-6_4_0-150600_10_5-rt-debuginfo
kernel-livepatch-SLE15-SP6_Update_3-debugsource
kernel-livepatch-6_4_0-150600_23_17-default
kernel-livepatch-6_4_0-150600_23_17-default-debuginfo
kernel-rt-devel-debuginfo
kernel-rt_debug
kernel-rt
kernel-devel-rt
kernel-source-rt
ocfs2-kmp-rt
gfs2-kmp-rt
gfs2-kmp-rt-debuginfo
kernel-rt-devel
kernel-rt_debug-devel-debuginfo
kernel-rt-debugsource
ocfs2-kmp-rt-debuginfo
kernel-rt_debug-devel
dlm-kmp-rt-debuginfo
dlm-kmp-rt
kernel-rt_debug-debugsource
cluster-md-kmp-rt
kernel-rt-base
cluster-md-kmp-rt-debuginfo
kernel-rt-debuginfo
kernel-rt_debug-debuginfo
kernel-rt-base-debuginfo
kernel-syms-rt
kernel-devel-azure
kernel-source-azure
kernel-azure
kernel-azure-debugsource
kernel-azure-devel
kernel-azure-base
kernel-azure-base-debuginfo
kernel-syms-azure
kernel-azure-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-extra-debuginfo
kernel-default-debuginfo
kernel-default-devel
gfs2-kmp-default
kernel-default-base-debuginfo
ocfs2-kmp-default-debuginfo
kernel-macros
dlm-kmp-default-debuginfo
ocfs2-kmp-default
cluster-md-kmp-default
kernel-default-base
kernel-syms
gfs2-kmp-default-debuginfo
kernel-default
kernel-source
kernel-devel
kernel-default-debugsource
kernel-default-devel-debuginfo
kernel-default-kgraft-devel
dlm-kmp-default
kernel-default-kgraft
kernel-obs-build-debugsource
kernel-obs-build
kernel-default-man
kernel-default-extra
kernel-docs
perf-debuginfo
kernel-tools-debuginfo
kernel-tools
kernel-headers
kernel-debugsource
kernel-debuginfo
kernel
python3-perf
python3-perf-debuginfo
kernel-tools-devel
perf
bpftool-debuginfo
bpftool
kselftests-kmp-rt-debuginfo
reiserfs-kmp-rt
kernel-rt-optional-debuginfo
kernel-rt_debug-livepatch-devel
kernel-rt_debug-vdso
reiserfs-kmp-rt-debuginfo
kernel-rt_debug-vdso-debuginfo
kernel-rt-optional
kernel-rt-vdso
kernel-rt-extra-debuginfo
kselftests-kmp-rt
kernel-rt-extra
kernel-rt-livepatch
kernel-rt-vdso-debuginfo
kernel-rt-livepatch-devel
kernel-azure-livepatch-devel
ocfs2-kmp-azure-debuginfo
kernel-azure-vdso
kernel-azure-vdso-debuginfo
gfs2-kmp-azure-debuginfo
kernel-azure-extra
kernel-azure-optional
kselftests-kmp-azure
kernel-azure-devel-debuginfo
dlm-kmp-azure-debuginfo
kselftests-kmp-azure-debuginfo
cluster-md-kmp-azure-debuginfo
kernel-azure-extra-debuginfo
dlm-kmp-azure
reiserfs-kmp-azure
reiserfs-kmp-azure-debuginfo
ocfs2-kmp-azure
kernel-azure-optional-debuginfo
gfs2-kmp-azure
cluster-md-kmp-azure
dlm-kmp-64kb-debuginfo
kernel-default-livepatch-devel
kselftests-kmp-default-debuginfo
kernel-default-optional
kernel-obs-qa
kernel-default-optional-debuginfo
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-default-livepatch
kernel-kvmsmall-vdso
kernel-source-vanilla
kernel-debug
kernel-debug-livepatch-devel
kernel-debug-debuginfo
kernel-debug-debugsource
kernel-debug-devel
kernel-debug-devel-debuginfo
kernel-kvmsmall-vdso-debuginfo
ocfs2-kmp-64kb-debuginfo
kernel-default-vdso
kernel-default-vdso-debuginfo
kernel-debug-vdso
kernel-debug-vdso-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-devel
kernel-kvmsmall-livepatch-devel
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel-debuginfo
kselftests-kmp-default
dtb-qcom
cluster-md-kmp-64kb-debuginfo
dtb-nvidia
dtb-socionext
dtb-cavium
dtb-apple
dtb-amd
dtb-apm
dtb-amlogic
dtb-arm
dtb-mediatek
dtb-altera
dtb-broadcom
kernel-zfcpdump
kernel-64kb-optional
kselftests-kmp-64kb-debuginfo
dtb-amazon
dtb-sprd
dtb-hisilicon
dtb-marvell
gfs2-kmp-64kb-debuginfo
kernel-64kb-devel-debuginfo
dtb-exynos
dtb-freescale
kernel-64kb
kernel-64kb-extra-debuginfo
kernel-kvmsmall
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
reiserfs-kmp-64kb
dtb-aarch64
dtb-xilinx
dtb-lg
cluster-md-kmp-64kb
gfs2-kmp-64kb
kernel-64kb-optional-debuginfo
dtb-allwinner
kernel-64kb-extra
kernel-64kb-debugsource
kernel-64kb-livepatch-devel
kernel-64kb-devel
kselftests-kmp-64kb
kernel-64kb-debuginfo
reiserfs-kmp-64kb-debuginfo
dlm-kmp-64kb
dtb-renesas
dtb-rockchip
ocfs2-kmp-64kb
kernel-default-base-rebuild
kernel-docs-html
linux (Debian package)
linux-image-virtual-hwe-24.04 (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-generic-hwe-24.04 (Ubuntu package)
linux-image-generic-64k-hwe-24.04 (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-6.8.0-44-generic-64k (Ubuntu package)
linux-image-6.8.0-44-generic (Ubuntu package)
linux-image-6.8.0-44-lowlatency-64k (Ubuntu package)
linux-image-6.8.0-44-lowlatency (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package)
linux-image-lowlatency-hwe-22.04 (Ubuntu package)
linux-image-oem-22.04b (Ubuntu package)
linux-image-oem-22.04a (Ubuntu package)
linux-image-oem-22.04 (Ubuntu package)
linux-image-oem-22.04c (Ubuntu package)
linux-image-generic-hwe-22.04 (Ubuntu package)
linux-image-generic-64k-hwe-22.04 (Ubuntu package)
linux-image-6.8.0-45-generic-64k (Ubuntu package)
linux-image-6.8.0-45-generic (Ubuntu package)
linux-image-oem-22.04d (Ubuntu package)
linux-image-virtual-hwe-22.04 (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-6.8.0-1010-gke (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-6.8.0-1011-raspi (Ubuntu package)
linux-image-6.8.0-1012-ibm (Ubuntu package)
linux-image-6.8.0-1012-oem (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-ibm-classic (Ubuntu package)
linux-image-ibm-lts-24.04 (Ubuntu package)
linux-image-6.8.0-1012-oracle-64k (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-oracle-64k (Ubuntu package)
linux-image-6.8.0-1012-oracle (Ubuntu package)
linux-image-nvidia-64k (Ubuntu package)
linux-image-nvidia (Ubuntu package)
linux-image-6.8.0-1013-nvidia (Ubuntu package)
linux-image-6.8.0-1013-nvidia-64k (Ubuntu package)
linux-image-6.8.0-1013-nvidia-lowlatency-64k (Ubuntu package)
linux-image-nvidia-lowlatency (Ubuntu package)
linux-image-6.8.0-1013-nvidia-lowlatency (Ubuntu package)
linux-image-nvidia-lowlatency-64k (Ubuntu package)
linux-image-nvidia-64k-6.8 (Ubuntu package)
linux-image-nvidia-6.8 (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-6.8.0-1014-azure-fde (Ubuntu package)
linux-image-6.8.0-1014-azure (Ubuntu package)
linux-image-6.8.0-1014-gcp (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-6.8.0-1015-aws (Ubuntu package)
Dell Secure Connect Gateway

Detailed vulnerability description

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

The vulnerability exists due to improper locking within the con_cleanup() function in drivers/tty/vt/vt.c, within the tty_set_ldisc() function in drivers/tty/tty_ldisc.c. A local user can perform a denial of service (DoS) attack.


How to mitigate CVE-2024-40966

Install update from vendor's website.

Sources