Improper locking in Linux kernel - CVE-2023-52681

Vulnerability identifier: #VU93768

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-2023-52681

CWE-ID: CWE-667

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to improper locking within the efivarfs_init_fs_context() function in fs/efivarfs/super.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
Public Cloud Module
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
openSUSE Leap
Ubuntu
kernel-livepatch-6_4_0-150600_10_5-rt-debuginfo
kernel-livepatch-6_4_0-150600_10_5-rt
kernel-livepatch-SLE15-SP6-RT_Update_1-debugsource
kernel-syms-azure
kernel-azure-extra
kernel-source-azure
kernel-devel-azure
kernel-azure-vdso
kernel-azure-vdso-debuginfo
kernel-azure
kernel-azure-optional-debuginfo
kselftests-kmp-azure
kernel-azure-devel
kernel-azure-debugsource
reiserfs-kmp-azure-debuginfo
ocfs2-kmp-azure
cluster-md-kmp-azure
reiserfs-kmp-azure
kernel-azure-debuginfo
kernel-azure-extra-debuginfo
dlm-kmp-azure-debuginfo
dlm-kmp-azure
kernel-azure-optional
gfs2-kmp-azure
kernel-azure-livepatch-devel
gfs2-kmp-azure-debuginfo
kernel-azure-devel-debuginfo
ocfs2-kmp-azure-debuginfo
kselftests-kmp-azure-debuginfo
cluster-md-kmp-azure-debuginfo
kernel-rt-devel-debuginfo
kernel-rt-vdso
gfs2-kmp-rt-debuginfo
kernel-rt-devel
kernel-rt-vdso-debuginfo
kernel-rt_debug-devel-debuginfo
ocfs2-kmp-rt
kselftests-kmp-rt
kernel-rt_debug-debuginfo
kernel-rt_debug-vdso-debuginfo
kernel-rt-livepatch-devel
kernel-rt-optional-debuginfo
dlm-kmp-rt
kernel-rt-extra
dlm-kmp-rt-debuginfo
kernel-rt-debugsource
kernel-syms-rt
kernel-rt-optional
ocfs2-kmp-rt-debuginfo
kernel-devel-rt
kernel-source-rt
kernel-rt_debug
kernel-rt
kernel-rt_debug-vdso
kernel-rt-extra-debuginfo
gfs2-kmp-rt
kernel-rt-debuginfo
kernel-rt_debug-livepatch-devel
reiserfs-kmp-rt
cluster-md-kmp-rt
reiserfs-kmp-rt-debuginfo
kernel-rt_debug-debugsource
cluster-md-kmp-rt-debuginfo
kselftests-kmp-rt-debuginfo
kernel-rt_debug-devel
linux-image-6.5.0-41-generic-64k (Ubuntu package)
linux-image-6.5.0-41-generic (Ubuntu package)
linux-image-generic-64k-hwe-22.04 (Ubuntu package)
linux-image-generic-hwe-22.04 (Ubuntu package)
linux-image-virtual-hwe-22.04 (Ubuntu package)
linux-image-6.5.0-1017-laptop (Ubuntu package)
linux-image-laptop-23.10 (Ubuntu package)
linux-image-6.5.0-1021-nvidia-64k (Ubuntu package)
linux-image-6.5.0-1021-nvidia (Ubuntu package)
linux-image-nvidia-hwe-22.04 (Ubuntu package)
linux-image-nvidia-64k-hwe-22.04 (Ubuntu package)
linux-image-nvidia-64k-6.5 (Ubuntu package)
linux-image-nvidia-6.5 (Ubuntu package)

Install update from vendor's website.

Linux kernel - addressed in versions 6.1.75, 6.6.14, 6.7.2, 6.8
kernel-livepatch-6_4_0-150600_10_5-rt-debuginfo - update to 1-150600.1.5.1
kernel-livepatch-6_4_0-150600_10_5-rt - update to 1-150600.1.5.1
kernel-livepatch-SLE15-SP6-RT_Update_1-debugsource - update to 1-150600.1.5.1
kernel-syms-azure - update to 6.4.0-150600.8.5.1
kernel-azure-extra - update to 6.4.0-150600.8.5.4
kernel-source-azure - update to 6.4.0-150600.8.5.4
kernel-devel-azure - update to 6.4.0-150600.8.5.4
kernel-azure-vdso - update to 6.4.0-150600.8.5.4
kernel-azure-vdso-debuginfo - update to 6.4.0-150600.8.5.4
kernel-azure - update to 6.4.0-150600.8.5.4
kernel-azure-optional-debuginfo - update to 6.4.0-150600.8.5.4
kselftests-kmp-azure - update to 6.4.0-150600.8.5.4
kernel-azure-devel - update to 6.4.0-150600.8.5.4
kernel-azure-debugsource - update to 6.4.0-150600.8.5.4
reiserfs-kmp-azure-debuginfo - update to 6.4.0-150600.8.5.4
ocfs2-kmp-azure - update to 6.4.0-150600.8.5.4
cluster-md-kmp-azure - update to 6.4.0-150600.8.5.4
reiserfs-kmp-azure - update to 6.4.0-150600.8.5.4
kernel-azure-debuginfo - update to 6.4.0-150600.8.5.4
kernel-azure-extra-debuginfo - update to 6.4.0-150600.8.5.4
dlm-kmp-azure-debuginfo - update to 6.4.0-150600.8.5.4
dlm-kmp-azure - update to 6.4.0-150600.8.5.4
kernel-azure-optional - update to 6.4.0-150600.8.5.4
gfs2-kmp-azure - update to 6.4.0-150600.8.5.4
kernel-azure-livepatch-devel - update to 6.4.0-150600.8.5.4
gfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.5.4
kernel-azure-devel-debuginfo - update to 6.4.0-150600.8.5.4
ocfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.5.4
kselftests-kmp-azure-debuginfo - update to 6.4.0-150600.8.5.4
cluster-md-kmp-azure-debuginfo - update to 6.4.0-150600.8.5.4
kernel-rt-devel-debuginfo - update to 6.4.0-150600.10.5.1
kernel-rt-vdso - update to 6.4.0-150600.10.5.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150600.10.5.1
kernel-rt-devel - update to 6.4.0-150600.10.5.1
kernel-rt-vdso-debuginfo - update to 6.4.0-150600.10.5.1
kernel-rt_debug-devel-debuginfo - update to 6.4.0-150600.10.5.1
ocfs2-kmp-rt - update to 6.4.0-150600.10.5.1
kselftests-kmp-rt - update to 6.4.0-150600.10.5.1
kernel-rt_debug-debuginfo - update to 6.4.0-150600.10.5.1
kernel-rt_debug-vdso-debuginfo - update to 6.4.0-150600.10.5.1
kernel-rt-livepatch-devel - update to 6.4.0-150600.10.5.1
kernel-rt-optional-debuginfo - update to 6.4.0-150600.10.5.1
dlm-kmp-rt - update to 6.4.0-150600.10.5.1
kernel-rt-extra - update to 6.4.0-150600.10.5.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150600.10.5.1
kernel-rt-debugsource - update to 6.4.0-150600.10.5.1
kernel-syms-rt - update to 6.4.0-150600.10.5.1
kernel-rt-optional - update to 6.4.0-150600.10.5.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150600.10.5.1
kernel-devel-rt - update to 6.4.0-150600.10.5.1
kernel-source-rt - update to 6.4.0-150600.10.5.1
kernel-rt_debug - update to 6.4.0-150600.10.5.1
kernel-rt - update to 6.4.0-150600.10.5.1
kernel-rt_debug-vdso - update to 6.4.0-150600.10.5.1
kernel-rt-extra-debuginfo - update to 6.4.0-150600.10.5.1
gfs2-kmp-rt - update to 6.4.0-150600.10.5.1
kernel-rt-debuginfo - update to 6.4.0-150600.10.5.1
kernel-rt_debug-livepatch-devel - update to 6.4.0-150600.10.5.1
reiserfs-kmp-rt - update to 6.4.0-150600.10.5.1
cluster-md-kmp-rt - update to 6.4.0-150600.10.5.1
reiserfs-kmp-rt-debuginfo - update to 6.4.0-150600.10.5.1
kernel-rt_debug-debugsource - update to 6.4.0-150600.10.5.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150600.10.5.1
kselftests-kmp-rt-debuginfo - update to 6.4.0-150600.10.5.1
kernel-rt_debug-devel - update to 6.4.0-150600.10.5.1
linux-image-6.5.0-41-generic-64k (Ubuntu package) - update to 6.5.0-41.41~22.04.2
linux-image-6.5.0-41-generic (Ubuntu package) - update to 6.5.0-41.41~22.04.2
linux-image-generic-64k-hwe-22.04 (Ubuntu package) - update to 6.5.0.41.41~22.04.2
linux-image-generic-hwe-22.04 (Ubuntu package) - update to 6.5.0.41.41~22.04.2
linux-image-virtual-hwe-22.04 (Ubuntu package) - update to 6.5.0.41.41~22.04.2
linux-image-6.5.0-1017-laptop (Ubuntu package) - update to 6.5.0-1017.20
linux-image-laptop-23.10 (Ubuntu package) - update to 6.5.0.1017.20
linux-image-6.5.0-1021-nvidia-64k (Ubuntu package) - update to 6.5.0-1021.22
linux-image-6.5.0-1021-nvidia (Ubuntu package) - update to 6.5.0-1021.22
linux-image-nvidia-hwe-22.04 (Ubuntu package) - update to 6.5.0.1021.29
linux-image-nvidia-64k-hwe-22.04 (Ubuntu package) - update to 6.5.0.1021.29
linux-image-nvidia-64k-6.5 (Ubuntu package) - update to 6.5.0.1021.29
linux-image-nvidia-6.5 (Ubuntu package) - update to 6.5.0.1021.29

• https://git.kernel.org/stable/c/ea6b597fcaca99562fa56a473bcbbbd79b40af03
• https://git.kernel.org/stable/c/48be1364dd387e375e1274b76af986cb8747be2c
• https://git.kernel.org/stable/c/92be3095c6ca1cdc46237839c6087555be9160e3
• https://git.kernel.org/stable/c/547713d502f7b4b8efccd409cff84d731a23853b
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.75
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.14
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.7.2
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.8

• Improper locking in Linux kernel efivarfs
• SUSE update for the Linux Kernel
• Ubuntu update for linux-laptop
• Ubuntu update for linux-nvidia-6.5
• Ubuntu update for linux-hwe-6.5
• SUSE update for the Linux Kernel