Use of uninitialized resource in Linux kernel - CVE-2025-37961

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Main Vulnerability Database Vulnerabilities #VU109552

Use of uninitialized resource in Linux kernel - CVE-2025-37961

Published: May 21, 2025


Vulnerability identifier: #VU109552
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-2025-37961
CWE-ID: CWE-908
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 use of uninitialized resource within the __mtu_check_toobig_v6(), do_output_route4() and __ip_vs_get_out_rt() functions in net/netfilter/ipvs/ip_vs_xmit.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Debian Linux
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Real Time 15
Basesystem Module
Confidential Computing Module
SUSE Linux Enterprise Live Patching
Legacy Module
Development Tools Module
openSUSE Leap
Ubuntu
Anolis OS
kernel-livepatch-6_4_0-150600_23_60-default
kernel-livepatch-SLE15-SP6_Update_13-debugsource
kernel-livepatch-6_4_0-150600_23_60-default-debuginfo
linux (Debian package)
kernel-syms-coco
kernel-devel-coco
kernel-source-coco
kernel-coco_debug-debugsource
kernel-coco
kernel-coco_debug
kernel-coco_debug-devel
kernel-coco-devel
kernel-coco_debug-devel-debuginfo
kernel-coco-debuginfo
reiserfs-kmp-coco-debuginfo
kernel-coco-debugsource
reiserfs-kmp-coco
kernel-coco-vdso-debuginfo
kernel-coco_debug-debuginfo
kernel-obs-qa
dtb-cavium
dtb-sprd
dtb-amlogic
dtb-exynos
dtb-altera
dtb-lg
dtb-apple
dtb-arm
dtb-amd
dtb-aarch64
kernel-docs
dtb-rockchip
dtb-xilinx
dtb-qcom
dtb-amazon
dtb-hisilicon
dtb-socionext
dtb-allwinner
dtb-nvidia
dtb-apm
dtb-broadcom
dtb-freescale
dtb-marvell
dtb-mediatek
dtb-renesas
kernel-docs-html
kernel-obs-build
kernel-obs-build-debugsource
kernel-syms
kernel-kvmsmall-vdso
reiserfs-kmp-64kb-debuginfo
kernel-64kb-optional-debuginfo
kernel-64kb
kernel-64kb-optional
kernel-64kb-devel-debuginfo
gfs2-kmp-64kb
kselftests-kmp-64kb
kernel-debug-vdso-debuginfo
ocfs2-kmp-64kb-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-64kb-extra
kernel-64kb-extra-debuginfo
kernel-64kb-devel
gfs2-kmp-64kb-debuginfo
reiserfs-kmp-64kb
dlm-kmp-64kb-debuginfo
kernel-kvmsmall-devel
ocfs2-kmp-64kb
kernel-kvmsmall-debuginfo
kernel-kvmsmall-debugsource
kernel-64kb-debuginfo
kernel-debug-debuginfo
kernel-macros
kernel-source
kernel-devel
kernel-source-vanilla
kernel-debug
kernel-debug-devel-debuginfo
kernel-kvmsmall
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-debug-devel
kernel-kvmsmall-vdso-debuginfo
kernel-debug-debugsource
kernel-debug-vdso
dlm-kmp-64kb
kernel-64kb-debugsource
kselftests-kmp-64kb-debuginfo
cluster-md-kmp-64kb
cluster-md-kmp-64kb-debuginfo
kernel-default-vdso
kernel-default-vdso-debuginfo
kernel-default-livepatch
kernel-default-extra
ocfs2-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-optional-debuginfo
dlm-kmp-default
kernel-default-debugsource
kernel-default-devel
kernel-default-optional
kselftests-kmp-default
reiserfs-kmp-default-debuginfo
kernel-default-livepatch-devel
kernel-default
kernel-default-extra-debuginfo
cluster-md-kmp-default
kernel-default-debuginfo
ocfs2-kmp-default
gfs2-kmp-default
kselftests-kmp-default-debuginfo
reiserfs-kmp-default
dlm-kmp-default-debuginfo
kernel-default-devel-debuginfo
kernel-default-base
kernel-default-base-rebuild
bpftool
python3-perf
perf
kernel-tools-libs-devel
kernel-tools-libs
kernel-tools
kernel-headers
kernel
kernel-64k-devel
kernel-64k
kernel-64k-debug
kernel-64k-debug-devel
linux (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-xilinx (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-ibm (Ubuntu package)
linux-nvidia-lowlatency (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-gcp-6.8 (Ubuntu package)
linux-azure-6.8 (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime-6.8 (Ubuntu package)
linux-hwe-6.14 (Ubuntu package)

How to mitigate CVE-2025-37961

Install update from vendor's website.

kernel-livepatch-6_4_0-150600_23_60-default - 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-debuginfo - update to 1-150600.13.6.4
linux (Debian package) - update to 6.1.140-1
kernel-syms-coco - 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-coco_debug-debugsource - update to 6.4.0-15061.28.coco15sp6.1
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-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-coco_debug-debuginfo - update to 6.4.0-15061.28.coco15sp6.1
kernel-obs-qa - update to 6.4.0-150600.23.60.2
dtb-cavium - update to 6.4.0-150600.23.60.3
dtb-sprd - update to 6.4.0-150600.23.60.3
dtb-amlogic - update to 6.4.0-150600.23.60.3
dtb-exynos - update to 6.4.0-150600.23.60.3
dtb-altera - update to 6.4.0-150600.23.60.3
dtb-lg - update to 6.4.0-150600.23.60.3
dtb-apple - update to 6.4.0-150600.23.60.3
dtb-arm - update to 6.4.0-150600.23.60.3
dtb-amd - update to 6.4.0-150600.23.60.3
dtb-aarch64 - update to 6.4.0-150600.23.60.3
kernel-docs - update to 6.4.0-150600.23.60.3
dtb-rockchip - 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-allwinner - update to 6.4.0-150600.23.60.3
dtb-nvidia - 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
dtb-renesas - update to 6.4.0-150600.23.60.3
kernel-docs-html - update to 6.4.0-150600.23.60.3
kernel-obs-build - update to 6.4.0-150600.23.60.3
kernel-obs-build-debugsource - update to 6.4.0-150600.23.60.3
kernel-syms - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-vdso - 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 - update to 6.4.0-150600.23.60.4
kernel-64kb-optional - update to 6.4.0-150600.23.60.4
kernel-64kb-devel-debuginfo - update to 6.4.0-150600.23.60.4
gfs2-kmp-64kb - update to 6.4.0-150600.23.60.4
kselftests-kmp-64kb - update to 6.4.0-150600.23.60.4
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.60.4
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.60.4
kernel-64kb-extra - update to 6.4.0-150600.23.60.4
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.60.4
kernel-64kb-devel - 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 - update to 6.4.0-150600.23.60.4
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-devel - update to 6.4.0-150600.23.60.4
ocfs2-kmp-64kb - 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-64kb-debuginfo - update to 6.4.0-150600.23.60.4
kernel-debug-debuginfo - update to 6.4.0-150600.23.60.4
kernel-macros - update to 6.4.0-150600.23.60.4
kernel-source - update to 6.4.0-150600.23.60.4
kernel-devel - update to 6.4.0-150600.23.60.4
kernel-source-vanilla - update to 6.4.0-150600.23.60.4
kernel-debug - update to 6.4.0-150600.23.60.4
kernel-debug-devel-debuginfo - 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-debug-devel - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.60.4
kernel-debug-debugsource - update to 6.4.0-150600.23.60.4
kernel-debug-vdso - update to 6.4.0-150600.23.60.4
dlm-kmp-64kb - update to 6.4.0-150600.23.60.4
kernel-64kb-debugsource - update to 6.4.0-150600.23.60.4
kselftests-kmp-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-default-vdso - update to 6.4.0-150600.23.60.5
kernel-default-vdso-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
ocfs2-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
cluster-md-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
dlm-kmp-default - update to 6.4.0-150600.23.60.5
kernel-default-debugsource - 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
kselftests-kmp-default - update to 6.4.0-150600.23.60.5
reiserfs-kmp-default-debuginfo - update to 6.4.0-150600.23.60.5
kernel-default-livepatch-devel - update to 6.4.0-150600.23.60.5
kernel-default - update to 6.4.0-150600.23.60.5
kernel-default-extra-debuginfo - 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
ocfs2-kmp-default - update to 6.4.0-150600.23.60.5
gfs2-kmp-default - update to 6.4.0-150600.23.60.5
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.60.5
reiserfs-kmp-default - update to 6.4.0-150600.23.60.5
dlm-kmp-default-debuginfo - update to 6.4.0-150600.23.60.5
kernel-default-devel-debuginfo - update to 6.4.0-150600.23.60.5
kernel-default-base - update to 6.4.0-150600.23.60.5.150600.12.26.4
kernel-default-base-rebuild - update to 6.4.0-150600.23.60.5.150600.12.26.4
bpftool - update to 6.6.102-5
python3-perf - update to 6.6.102-5
perf - update to 6.6.102-5
kernel-tools-libs-devel - update to 6.6.102-5
kernel-tools-libs - update to 6.6.102-5
kernel-tools - update to 6.6.102-5
kernel-headers - update to 6.6.102-5
kernel-devel - update to 6.6.102-5
kernel-debug-devel - update to 6.6.102-5
kernel-debug - update to 6.6.102-5
kernel - update to 6.6.102-5
kernel-64k-devel - update to 6.6.102-5
kernel-64k - update to 6.6.102-5
kernel-64k-debug - update to 6.6.102-5
kernel-64k-debug-devel - update to 6.6.102-5
linux (Ubuntu package) - addressed in versions 6.8.0-100.100, 6.8.0-1047.51, 6.14.0-28.28, 6.14.0-1010.10~24.04.1, 6.14.0-1011.11, 6.14.0-1011.11~24.04.1, 6.14.0-1012.12~24.04.1, 6.14.0-1014.15, 6.14.0-1014.15~24.04.1
linux-aws-fips (Ubuntu package) - addressed in versions 6.8.0-100.100+fips1, 6.8.0-1046.49+fips1
linux-lowlatency (Ubuntu package) - update to 6.8.0-100.100.1
linux-hwe-6.8 (Ubuntu package) - addressed in versions 6.8.0-100.100.1~22.04.1, 6.8.0-100.100~22.04.1
linux-xilinx (Ubuntu package) - addressed in versions 6.8.0-1023.24, 6.8.0.1023.24
linux-aws (Ubuntu package) - addressed in versions 6.8.0-1030.33, 6.8.0-1043.44, 6.8.0-1043.44~22.04.1, 6.8.0-1046.49~22.04.1
linux-gcp (Ubuntu package) - addressed in versions 6.8.0-1043.48, 6.8.0-1047.50~22.04.2
linux-ibm (Ubuntu package) - addressed in versions 6.8.0-1044.44, 6.8.0-1044.44~22.04.1
linux-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1046.49.1
linux-azure (Ubuntu package) - update to 6.8.0-1046.52
linux-azure-fips (Ubuntu package) - update to 6.8.0-1046.52+fips1
linux-gcp-fips (Ubuntu package) - update to 6.8.0-1047.50+fips1
linux-gcp-6.8 (Ubuntu package) - update to 6.8.0-1047.50~22.04.2
linux-azure-6.8 (Ubuntu package) - update to 6.8.0-1051.57~22.04.1
linux-raspi-realtime (Ubuntu package) - addressed in versions 6.8.0-2037.38, 6.8.1-1041.42
linux-realtime-6.8 (Ubuntu package) - update to 6.8.1-1041.42~22.04.1
linux-hwe-6.14 (Ubuntu package) - addressed in versions 6.14.0-28.28~24.04.1, 6.14.0-1010.10

External References

Related Security Bulletins