Division by zero in Linux kernel - CVE-2025-21898

 

Division by zero in Linux kernel - CVE-2025-21898

Published: April 2, 2025 / Updated: May 11, 2025


Vulnerability identifier: #VU106846
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-2025-21898
CWE-ID: CWE-369
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a division by zero error within the function_stat_show() function in kernel/trace/ftrace.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Debian Linux
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 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
Confidential Computing Module
SUSE Linux Enterprise Live Patching
Legacy Module
Development Tools Module
Basesystem Module
openSUSE Leap
Ubuntu
openEuler
kernel-livepatch-6_4_0-150600_23_60-default-debuginfo
kernel-livepatch-SLE15-SP6_Update_13-debugsource
kernel-livepatch-6_4_0-150600_23_60-default
linux (Ubuntu package)
linux-hwe-5.4 (Ubuntu package)
linux-iot (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-ibm (Ubuntu package)
linux-ibm-5.4 (Ubuntu package)
linux-bluefield (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-raspi (Ubuntu package)
linux-raspi-5.4 (Ubuntu package)
linux-azure (Ubuntu package)
linux-oracle-5.4 (Ubuntu package)
linux-aws (Ubuntu package)
linux-aws-5.4 (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-azure-fips (Ubuntu package)
kernel-debugsource
kernel-devel
kernel-headers
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
kernel
kernel-debuginfo
python3-perf
python3-perf-debuginfo
bpftool
bpftool-debuginfo
linux-hwe-5.15 (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-gke (Ubuntu package)
linux-gcp (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux (Debian package)
kernel-coco
kernel-coco_debug
kernel-coco_debug-devel
kernel-coco-devel
kernel-coco_debug-debuginfo
kernel-coco_debug-devel-debuginfo
kernel-coco-debuginfo
reiserfs-kmp-coco-debuginfo
kernel-coco-debugsource
reiserfs-kmp-coco
kernel-coco-vdso-debuginfo
kernel-syms-coco
kernel-coco_debug-debugsource
kernel-devel-coco
kernel-source-coco
kernel-obs-qa
dtb-apple
dtb-rockchip
kernel-obs-build
dtb-cavium
kernel-obs-build-debugsource
dtb-aarch64
dtb-amd
dtb-arm
dtb-sprd
dtb-xilinx
dtb-qcom
dtb-amazon
dtb-hisilicon
dtb-socionext
dtb-renesas
dtb-lg
dtb-allwinner
kernel-docs-html
dtb-altera
dtb-exynos
dtb-nvidia
dtb-amlogic
dtb-apm
dtb-broadcom
dtb-freescale
dtb-marvell
dtb-mediatek
kernel-docs
kernel-64kb-debugsource
kernel-debug
kernel-64kb
kernel-64kb-optional
kernel-kvmsmall
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-macros
kernel-64kb-devel-debuginfo
kernel-64kb-extra-debuginfo
reiserfs-kmp-64kb
dlm-kmp-64kb
kernel-debug-devel-debuginfo
dlm-kmp-64kb-debuginfo
kselftests-kmp-64kb-debuginfo
kernel-64kb-debuginfo
cluster-md-kmp-64kb
cluster-md-kmp-64kb-debuginfo
kernel-64kb-extra
ocfs2-kmp-64kb
gfs2-kmp-64kb-debuginfo
reiserfs-kmp-64kb-debuginfo
kernel-64kb-optional-debuginfo
kernel-64kb-devel
ocfs2-kmp-64kb-debuginfo
kselftests-kmp-64kb
gfs2-kmp-64kb
kernel-debug-devel
kernel-syms
kernel-source-vanilla
kernel-kvmsmall-devel
kernel-kvmsmall-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-devel-debuginfo
kernel-debug-vdso-debuginfo
kernel-kvmsmall-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-debug-vdso
kernel-debug-debugsource
kernel-debug-debuginfo
kernel-default-vdso-debuginfo
kernel-default-vdso
dlm-kmp-default-debuginfo
kernel-default-optional-debuginfo
reiserfs-kmp-default
kselftests-kmp-default-debuginfo
ocfs2-kmp-default
dlm-kmp-default
cluster-md-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
kselftests-kmp-default
kernel-default-debugsource
reiserfs-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-default-livepatch
kernel-default-extra
kernel-default-devel-debuginfo
kernel-default-extra-debuginfo
kernel-default
kernel-default-livepatch-devel
kernel-default-devel
kernel-default-optional
cluster-md-kmp-default
kernel-default-debuginfo
gfs2-kmp-default
kernel-default-base-rebuild
kernel-default-base
linux-hwe-6.8 (Ubuntu package)
linux-azure-nvidia (Ubuntu package)
linux-oracle (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime (Ubuntu package)
linux-realtime-6.8 (Ubuntu package)
linux-lowlatency (Ubuntu package)
PowerSwitch Z9864F-ON

How to mitigate CVE-2025-21898

Install update from vendor's website.

Linux kernel - update to 6.6.81
kernel-livepatch-6_4_0-150600_23_60-default-debuginfo - update to 1-150600.13.6.4
kernel-livepatch-SLE15-SP6_Update_13-debugsource - update to 1-150600.13.6.4
kernel-livepatch-6_4_0-150600_23_60-default - update to 1-150600.13.6.4
PowerSwitch Z9864F-ON - update to 3.5.0
linux (Ubuntu package) - addressed in versions 5.4.0.216.208, 5.4.0-216.236, 5.4.0.1144.138, 5.4.0-1144.154, 5.4.0.1149.151, 5.4.0-1149.158, 5.4.0.1149.158~18.04.1, 5.4.0-1149.158~18.04.1, 5.4.0.1151.158~18.04.1, 5.4.0-1151.158~18.04.1, 5.15.0.140.126, 5.15.0.140.135, 5.15.0-140.150, 5.15.0.140.150~20.04.1, 5.15.0-140.150~20.04.1, 5.15.0.1066.65, 5.15.0-1066.74, 5.15.0.1076.72, 5.15.0-1076.79, 5.15.0-1076.79~20.04.1, 5.15.0.1076.79~20.04.1, 5.15.0.1078.78, 5.15.0-1078.79, 5.15.0.1079.79, 5.15.0-1079.85, 5.15.0.1080.76, 5.15.0-1080.85, 5.15.0.1081.77, 5.15.0-1081.87, 5.15.0-1081.87~20.04.1, 5.15.0.1081.87~20.04.1, 6.8.0-84.84, 6.8.0-84.84.1, 6.8.0-84.84.1~22.04.1, 6.8.0-1023.25, 6.8.0-1036.40, 6.8.0-1039.41, 6.8.0-1040.42, 6.11.0-26.26, 6.11.0-26.26~24.04.1, 6.11.0-1010.10, 6.11.0-1013.13, 6.11.0-1015.15, 6.11.0-1015.15~24.04.1, 6.11.0-1022.22
linux-hwe-5.4 (Ubuntu package) - addressed in versions 5.4.0-216.236~18.04.1, 5.4.0.216.236~18.04.1
linux-iot (Ubuntu package) - update to 5.4.0-1051.54
linux-xilinx-zynqmp (Ubuntu package) - addressed in versions 5.4.0.1064.64, 5.4.0-1064.68, 5.15.0.1050.53, 5.15.0-1050.54
linux-ibm (Ubuntu package) - addressed in versions 5.4.0-1092.97, 5.4.0.1092.121, 6.8.0-1037.37, 6.8.0-1037.37~22.04.1
linux-ibm-5.4 (Ubuntu package) - addressed in versions 5.4.0-1092.97~18.04.1, 5.4.0.1092.97~18.04.1
linux-bluefield (Ubuntu package) - addressed in versions 5.4.0.1105.101, 5.4.0-1105.112
linux-aws-fips (Ubuntu package) - addressed in versions 5.4.0.1120.117, 5.4.0-1120.130, 5.4.0.1146.93, 5.4.0-1146.156+fips1, 5.15.0.1084.80, 5.15.0-1084.91+fips1
linux-raspi (Ubuntu package) - addressed in versions 5.4.0-1129.142, 5.4.0.1129.160, 6.8.0-1039.43
linux-raspi-5.4 (Ubuntu package) - addressed in versions 5.4.0-1129.142~18.04.1, 5.4.0.1129.142~18.04.1
linux-azure (Ubuntu package) - addressed in versions 5.4.0.1133.129, 5.4.0-1133.142, 5.4.0.1151.145, 5.4.0-1151.158, 5.15.0.1037.37, 5.15.0-1037.37, 5.15.0.1089.87, 5.15.0-1089.98, 5.15.0-1089.98~20.04.1, 5.15.0.1089.98~20.04.1, 6.8.0-1036.42~22.04.1, 6.8.0-1038.44
linux-oracle-5.4 (Ubuntu package) - addressed in versions 5.4.0-1144.154~18.04.1, 5.4.0.1144.154~18.04.1
linux-aws (Ubuntu package) - addressed in versions 5.4.0.1146.143, 5.4.0-1146.156, 5.15.0-1026.26, 5.15.0.1026.28, 5.15.0.1078.76, 5.15.0-1078.81, 5.15.0-1079.85~20.04.1, 5.15.0.1079.85~20.04.1, 5.15.0.1084.86, 5.15.0-1084.91, 6.11.0-1014.15
linux-aws-5.4 (Ubuntu package) - addressed in versions 5.4.0-1146.156~18.04.1, 5.4.0.1146.156~18.04.1
linux-gcp-fips (Ubuntu package) - addressed in versions 5.4.0.1149.91, 5.4.0-1149.158+fips1, 5.15.0.1083.73, 5.15.0-1083.92+fips1
linux-azure-fips (Ubuntu package) - addressed in versions 5.4.0.1151.88, 5.4.0-1151.158+fips1, 5.15.0.1089.74, 5.15.0-1089.98+fips1
kernel-debugsource - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-devel - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-headers - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-source - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools-debuginfo - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools-devel - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
perf - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
perf-debuginfo - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-debuginfo - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
python3-perf - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
python3-perf-debuginfo - addressed in versions 5.10.0-261.0.0.163, 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
bpftool - addressed in versions 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
bpftool-debuginfo - addressed in versions 5.10.0-261.0.0.164, 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
linux-hwe-5.15 (Ubuntu package) - addressed in versions 5.15.0-142.152~20.04.1, 5.15.0.142.152~20.04.1
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1077.79, 5.15.0.1077.81, 5.15.0.1084.88, 5.15.0-1084.93
linux-gke (Ubuntu package) - addressed in versions 5.15.0.1081.80, 5.15.0-1081.87
linux-gcp (Ubuntu package) - addressed in versions 5.15.0.1083.79, 5.15.0-1083.92
linux-gcp-5.15 (Ubuntu package) - addressed in versions 5.15.0-1083.92~20.04.1, 5.15.0.1083.92~20.04.1
linux-aws-5.15 (Ubuntu package) - addressed in versions 5.15.0-1084.91~20.04.1, 5.15.0.1084.91~20.04.1
linux (Debian package) - update to 6.1.133-1
kernel-coco - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco_debug - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco_debug-devel - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco-devel - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco_debug-debuginfo - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco_debug-devel-debuginfo - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco-debuginfo - update to 6.4.0-15061.28.coco15sp6.1
reiserfs-kmp-coco-debuginfo - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco-debugsource - update to 6.4.0-15061.28.coco15sp6.1
reiserfs-kmp-coco - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco-vdso-debuginfo - update to 6.4.0-15061.28.coco15sp6.1
kernel-syms-coco - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco_debug-debugsource - update to 6.4.0-15061.28.coco15sp6.1
kernel-devel-coco - update to 6.4.0-15061.28.coco15sp6.1
kernel-source-coco - update to 6.4.0-15061.28.coco15sp6.1
kernel-obs-qa - update to 6.4.0-150600.23.60.2
dtb-apple - update to 6.4.0-150600.23.60.3
dtb-rockchip - update to 6.4.0-150600.23.60.3
kernel-obs-build - update to 6.4.0-150600.23.60.3
dtb-cavium - update to 6.4.0-150600.23.60.3
kernel-obs-build-debugsource - update to 6.4.0-150600.23.60.3
dtb-aarch64 - update to 6.4.0-150600.23.60.3
dtb-amd - update to 6.4.0-150600.23.60.3
dtb-arm - update to 6.4.0-150600.23.60.3
dtb-sprd - update to 6.4.0-150600.23.60.3
dtb-xilinx - update to 6.4.0-150600.23.60.3
dtb-qcom - update to 6.4.0-150600.23.60.3
dtb-amazon - update to 6.4.0-150600.23.60.3
dtb-hisilicon - update to 6.4.0-150600.23.60.3
dtb-socionext - update to 6.4.0-150600.23.60.3
dtb-renesas - update to 6.4.0-150600.23.60.3
dtb-lg - update to 6.4.0-150600.23.60.3
dtb-allwinner - update to 6.4.0-150600.23.60.3
kernel-docs-html - update to 6.4.0-150600.23.60.3
dtb-altera - update to 6.4.0-150600.23.60.3
dtb-exynos - update to 6.4.0-150600.23.60.3
dtb-nvidia - update to 6.4.0-150600.23.60.3
dtb-amlogic - update to 6.4.0-150600.23.60.3
dtb-apm - update to 6.4.0-150600.23.60.3
dtb-broadcom - update to 6.4.0-150600.23.60.3
dtb-freescale - update to 6.4.0-150600.23.60.3
dtb-marvell - update to 6.4.0-150600.23.60.3
dtb-mediatek - update to 6.4.0-150600.23.60.3
kernel-docs - update to 6.4.0-150600.23.60.3
kernel-64kb-debugsource - update to 6.4.0-150600.23.60.4
kernel-source - update to 6.4.0-150600.23.60.4
kernel-debug - update to 6.4.0-150600.23.60.4
kernel-64kb - update to 6.4.0-150600.23.60.4
kernel-64kb-optional - update to 6.4.0-150600.23.60.4
kernel-kvmsmall - update to 6.4.0-150600.23.60.4
kernel-zfcpdump - update to 6.4.0-150600.23.60.4
kernel-zfcpdump-debuginfo - update to 6.4.0-150600.23.60.4
kernel-zfcpdump-debugsource - update to 6.4.0-150600.23.60.4
kernel-macros - update to 6.4.0-150600.23.60.4
kernel-64kb-devel-debuginfo - update to 6.4.0-150600.23.60.4
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.60.4
reiserfs-kmp-64kb - update to 6.4.0-150600.23.60.4
dlm-kmp-64kb - update to 6.4.0-150600.23.60.4
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.60.4
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.60.4
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.60.4
kernel-64kb-debuginfo - update to 6.4.0-150600.23.60.4
cluster-md-kmp-64kb - update to 6.4.0-150600.23.60.4
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.60.4
kernel-64kb-extra - update to 6.4.0-150600.23.60.4
ocfs2-kmp-64kb - update to 6.4.0-150600.23.60.4
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.60.4
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.60.4
kernel-64kb-optional-debuginfo - update to 6.4.0-150600.23.60.4
kernel-64kb-devel - update to 6.4.0-150600.23.60.4
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.60.4
kselftests-kmp-64kb - update to 6.4.0-150600.23.60.4
gfs2-kmp-64kb - update to 6.4.0-150600.23.60.4
kernel-debug-devel - update to 6.4.0-150600.23.60.4
kernel-syms - update to 6.4.0-150600.23.60.4
kernel-source-vanilla - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-devel - update to 6.4.0-150600.23.60.4
kernel-devel - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.60.4
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.60.4
kernel-debug-vdso - update to 6.4.0-150600.23.60.4
kernel-debug-debugsource - update to 6.4.0-150600.23.60.4
kernel-debug-debuginfo - update to 6.4.0-150600.23.60.4
kernel-default-vdso-debuginfo - update to 6.4.0-150600.23.60.5
kernel-default-vdso - update to 6.4.0-150600.23.60.5
dlm-kmp-default-debuginfo - update to 6.4.0-150600.23.60.5
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.60.5
reiserfs-kmp-default - update to 6.4.0-150600.23.60.5
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.60.5
ocfs2-kmp-default - update to 6.4.0-150600.23.60.5
dlm-kmp-default - update to 6.4.0-150600.23.60.5
cluster-md-kmp-default-debuginfo - update to 6.4.0-150600.23.60.5
gfs2-kmp-default-debuginfo - update to 6.4.0-150600.23.60.5
kselftests-kmp-default - update to 6.4.0-150600.23.60.5
kernel-default-debugsource - update to 6.4.0-150600.23.60.5
reiserfs-kmp-default-debuginfo - update to 6.4.0-150600.23.60.5
ocfs2-kmp-default-debuginfo - update to 6.4.0-150600.23.60.5
kernel-default-livepatch - update to 6.4.0-150600.23.60.5
kernel-default-extra - update to 6.4.0-150600.23.60.5
kernel-default-devel-debuginfo - update to 6.4.0-150600.23.60.5
kernel-default-extra-debuginfo - update to 6.4.0-150600.23.60.5
kernel-default - update to 6.4.0-150600.23.60.5
kernel-default-livepatch-devel - update to 6.4.0-150600.23.60.5
kernel-default-devel - update to 6.4.0-150600.23.60.5
kernel-default-optional - update to 6.4.0-150600.23.60.5
cluster-md-kmp-default - update to 6.4.0-150600.23.60.5
kernel-default-debuginfo - update to 6.4.0-150600.23.60.5
gfs2-kmp-default - update to 6.4.0-150600.23.60.5
kernel-default-base-rebuild - update to 6.4.0-150600.23.60.5.150600.12.26.4
kernel-default-base - update to 6.4.0-150600.23.60.5.150600.12.26.4
linux-hwe-6.8 (Ubuntu package) - addressed in versions 6.8.0-84.84~22.04.1, 6.8.0-85.85~22.04.1
linux-azure-nvidia (Ubuntu package) - update to 6.8.0-1025.27
linux-oracle (Ubuntu package) - update to 6.8.0-1037.38
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1037.38~22.04.1
linux-aws-6.8 (Ubuntu package) - addressed in versions 6.8.0-1039.41~22.04.1, 6.8.0-1040.42~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1039.42, 6.8.0-1039.42.1, 6.8.0-1039.42~22.04.1
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2031.32
linux-realtime (Ubuntu package) - update to 6.8.1-1034.35
linux-realtime-6.8 (Ubuntu package) - update to 6.8.1-1034.35~22.04.1
linux-lowlatency (Ubuntu package) - addressed in versions 6.11.0-1014.15, 6.11.0-1014.15~24.04.1, 6.11.0-1016.17

External References

Related Security Bulletins