Infinite loop in Linux kernel - CVE-2025-21872

Vulnerability identifier: #VU106128

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-2025-21872

CWE-ID: CWE-835

Exploitation vector: Local access

Exploit availability: No public exploit available

Affected software:
Linux kernel
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
Public Cloud Module
Confidential Computing Module
Legacy Module
Development Tools Module
Basesystem Module
openSUSE Leap
Ubuntu
openEuler
kernel-livepatch-6_4_0-150600_10_49-rt
kernel-livepatch-SLE15-SP6-RT_Update_14-debugsource
kernel-livepatch-6_4_0-150600_10_49-rt-debuginfo
kernel-livepatch-6_4_0-150600_23_65-default-debuginfo
kernel-livepatch-SLE15-SP6_Update_14-debugsource
kernel-livepatch-6_4_0-150600_23_65-default
kernel-livepatch-6_4_0-150700_7_13-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_13-rt
kernel-livepatch-SLE15-SP7-RT_Update_3-debugsource
kernel-livepatch-SLE15-SP7_Update_3-debugsource
kernel-livepatch-6_4_0-150700_53_11-default
kernel-livepatch-6_4_0-150700_53_11-default-debuginfo
kernel-coco_debug-debuginfo
kernel-coco
kernel-coco_debug
kernel-coco_debug-devel
kernel-coco-devel
kernel-coco_debug-devel-debuginfo
kernel-coco-debuginfo
reiserfs-kmp-coco-debuginfo
reiserfs-kmp-coco
kernel-coco-vdso-debuginfo
kernel-coco-debugsource
kernel-syms-coco
kernel-coco_debug-debugsource
kernel-devel-coco
kernel-source-coco
kernel-azure-devel
kernel-azure-devel-debuginfo
kernel-azure-debugsource
kernel-azure-optional-debuginfo
dlm-kmp-azure
cluster-md-kmp-azure-debuginfo
dlm-kmp-azure-debuginfo
gfs2-kmp-azure
ocfs2-kmp-azure
kernel-azure-extra
reiserfs-kmp-azure
kselftests-kmp-azure-debuginfo
kernel-azure-optional
cluster-md-kmp-azure
kernel-syms-azure
kselftests-kmp-azure
reiserfs-kmp-azure-debuginfo
kernel-source-azure
kernel-devel-azure
gfs2-kmp-azure-debuginfo
ocfs2-kmp-azure-debuginfo
kernel-azure-extra-debuginfo
kernel-azure
kernel-azure-vdso
kernel-azure-vdso-debuginfo
kernel-azure-debuginfo
kselftests-kmp-rt-debuginfo
kernel-devel-rt
kernel-rt-extra-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt-extra
kernel-rt_debug-devel
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt
dlm-kmp-rt-debuginfo
kselftests-kmp-rt
kernel-rt_debug-vdso-debuginfo
kernel-rt_debug-devel-debuginfo
kernel-rt-optional-debuginfo
reiserfs-kmp-rt
kernel-rt_debug-debuginfo
kernel-source-rt
kernel-rt-devel
kernel-rt-debuginfo
ocfs2-kmp-rt
kernel-rt_debug-vdso
kernel-rt-devel-debuginfo
kernel-rt_debug-debugsource
kernel-rt-livepatch-devel
kernel-rt-vdso-debuginfo
gfs2-kmp-rt
gfs2-kmp-rt-debuginfo
kernel-rt-debugsource
dlm-kmp-rt
kernel-rt-optional
reiserfs-kmp-rt-debuginfo
kernel-syms-rt
kernel-rt-vdso
kernel-rt_debug
kernel-rt
dtb-amazon
reiserfs-kmp-default-debuginfo
dtb-renesas
dtb-aarch64
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kernel-kvmsmall
dtb-apm
cluster-md-kmp-64kb
cluster-md-kmp-64kb-debuginfo
kernel-default-livepatch-devel
kernel-default
ocfs2-kmp-default
kernel-obs-build-debugsource
kernel-obs-build
kernel-default-extra
kernel-default-extra-debuginfo
kernel-default-debugsource
kernel-syms
dlm-kmp-default-debuginfo
kernel-default-optional
kernel-default-debuginfo
gfs2-kmp-default
kselftests-kmp-64kb
dtb-amlogic
kselftests-kmp-64kb-debuginfo
gfs2-kmp-64kb
dtb-cavium
reiserfs-kmp-64kb
ocfs2-kmp-64kb
kernel-64kb-optional-debuginfo
dtb-socionext
dtb-marvell
dtb-amd
dtb-qcom
dtb-rockchip
reiserfs-kmp-64kb-debuginfo
dtb-nvidia
dlm-kmp-64kb
kernel-64kb-extra
dtb-mediatek
dtb-allwinner
dtb-hisilicon
kernel-64kb-optional
ocfs2-kmp-64kb-debuginfo
kernel-64kb-devel
gfs2-kmp-64kb-debuginfo
dtb-apple
dtb-sprd
kernel-64kb-debugsource
kernel-debug-devel-debuginfo
kernel-debug-devel
kernel-debug-debuginfo
kernel-debug-debugsource
kernel-debug
kernel-source-vanilla
kernel-macros
kernel-devel
kernel-docs-html
kernel-source
kernel-docs
kernel-64kb-debuginfo
dlm-kmp-default
kernel-64kb-devel-debuginfo
dtb-freescale
dlm-kmp-64kb-debuginfo
dtb-altera
kernel-64kb-extra-debuginfo
dtb-lg
dtb-xilinx
dtb-arm
dtb-broadcom
dtb-exynos
kernel-64kb
kernel-default-vdso-debuginfo
kselftests-kmp-default
reiserfs-kmp-default
kernel-default-devel-debuginfo
kernel-obs-qa
ocfs2-kmp-default-debuginfo
kernel-default-devel
kernel-default-livepatch
cluster-md-kmp-default
cluster-md-kmp-default-debuginfo
kselftests-kmp-default-debuginfo
kernel-default-optional-debuginfo
gfs2-kmp-default-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel
kernel-kvmsmall-vdso
kernel-debug-vdso
kernel-default-vdso
kernel-debug-vdso-debuginfo
kernel-kvmsmall-vdso-debuginfo
kernel-default-base
kernel-default-base-rebuild
kernel-headers
perf-debuginfo
python3-perf
python3-perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-debugsource
kernel-debuginfo
kernel
bpftool
bpftool-debuginfo
linux (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-azure-nvidia (Ubuntu package)
linux-azure (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oracle (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-raspi (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime (Ubuntu package)
linux-realtime-6.8 (Ubuntu package)
linux-aws (Ubuntu package)
linux-lowlatency (Ubuntu package)

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

The vulnerability exists due to infinite loop within the efi_mokvar_table_init() function in drivers/firmware/efi/mokvar-table.c. A local user can perform a denial of service (DoS) attack.

Install update from vendor's website.

• https://git.kernel.org/stable/c/2b90e7ace79774a3540ce569e000388f8d22c9e0
• https://git.kernel.org/stable/c/46c0454ffb78ce9d3355a3cccac86383ea8ddd55
• https://git.kernel.org/stable/c/65f4aebb8127708ba668dd938e83b8558abfc5cd
• https://git.kernel.org/stable/c/97bd560b6cc4c26386a53b4881bf03e96f9ba03a
• https://git.kernel.org/stable/c/ea3f0b362dfe4ef885ef812bfaf4088176422c91
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.83