Resource management error in Linux kernel - CVE-2025-21938

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Main Vulnerability Database Vulnerabilities #VU106851

Resource management error in Linux kernel - CVE-2025-21938

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


Vulnerability identifier: #VU106851
CSH Severity: Low
CVSS v4 BT: 4.3 [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-2025-21938
CWE-ID: CWE-399
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 resource management error within the __mptcp_pm_release_addr_entry(), mptcp_pm_nl_append_new_local_addr(), mptcp_pm_nl_get_local_id() and mptcp_pm_nl_add_addr_doit() functions in net/mptcp/pm_netlink.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
SUSE Linux Micro Extras
SUSE Linux Micro
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 (Debian package)
kernel-rt-devel-debuginfo
kernel-rt-devel
kernel-rt-debugsource
kernel-rt-debuginfo
kernel-rt-livepatch
kernel-rt
kernel-devel-rt
kernel-source-rt
kernel-source-coco
kernel-coco
kernel-coco_debug-devel
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-coco-debuginfo
kernel-coco_debug-devel-debuginfo
kernel-coco_debug-debuginfo
kernel-coco-devel
kernel-coco_debug
kernel-obs-qa
dtb-rockchip
dtb-cavium
dtb-amlogic
dtb-xilinx
dtb-qcom
dtb-sprd
dtb-exynos
dtb-altera
dtb-lg
dtb-apple
dtb-arm
dtb-amd
dtb-aarch64
kernel-docs
kernel-docs-html
kernel-obs-build
kernel-obs-build-debugsource
dtb-amazon
dtb-marvell
dtb-freescale
dtb-broadcom
dtb-apm
dtb-nvidia
dtb-mediatek
dtb-renesas
dtb-allwinner
dtb-socionext
dtb-hisilicon
kernel-64kb-optional
kernel-debug-devel-debuginfo
kernel-debug-devel
kernel-debug-debuginfo
kernel-debug-debugsource
kernel-zfcpdump
kernel-debug-vdso
kernel-kvmsmall
kernel-kvmsmall-vdso-debuginfo
kselftests-kmp-64kb
kernel-64kb
kernel-kvmsmall-vdso
kernel-syms
kernel-debug-vdso-debuginfo
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debugsource
kernel-kvmsmall-debuginfo
kernel-kvmsmall-devel
reiserfs-kmp-64kb
kernel-64kb-extra-debuginfo
kernel-64kb-devel-debuginfo
kernel-source-vanilla
gfs2-kmp-64kb
ocfs2-kmp-64kb-debuginfo
kernel-64kb-optional-debuginfo
reiserfs-kmp-64kb-debuginfo
kernel-64kb-devel
kernel-64kb-extra
cluster-md-kmp-64kb-debuginfo
cluster-md-kmp-64kb
gfs2-kmp-64kb-debuginfo
kselftests-kmp-64kb-debuginfo
dlm-kmp-64kb
ocfs2-kmp-64kb
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-macros
kernel-source
dlm-kmp-64kb-debuginfo
kernel-debug
kernel-devel
gfs2-kmp-default-debuginfo
kselftests-kmp-default
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
dlm-kmp-default-debuginfo
kernel-default-optional-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-vdso
kernel-default-vdso-debuginfo
reiserfs-kmp-default
kselftests-kmp-default-debuginfo
gfs2-kmp-default
ocfs2-kmp-default
cluster-md-kmp-default
kernel-default-optional
kernel-default-devel
kernel-default-debugsource
dlm-kmp-default
kernel-default-debuginfo
kernel-default-base
kernel-default-base-rebuild
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-headers
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel
linux (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-gcp (Ubuntu package)
linux-azure-nvidia (Ubuntu package)
linux-gke (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-azure (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-realtime (Ubuntu package)
linux-aws (Ubuntu package)
linux-lowlatency (Ubuntu package)

How to mitigate CVE-2025-21938

Install update from vendor's website.

Linux kernel - update to 6.6.83
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
linux (Debian package) - update to 6.1.133-1
kernel-rt-devel-debuginfo - update to 6.4.0-33.1
kernel-rt-devel - update to 6.4.0-33.1
kernel-rt-debugsource - update to 6.4.0-33.1
kernel-rt-debuginfo - update to 6.4.0-33.1
kernel-rt-livepatch - update to 6.4.0-33.1
kernel-rt - update to 6.4.0-33.1
kernel-devel-rt - update to 6.4.0-33.1
kernel-source-rt - update to 6.4.0-33.1
kernel-source-coco - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco_debug-devel - 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-coco-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_debug-debuginfo - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco-devel - update to 6.4.0-15061.28.coco15sp6.1
kernel-coco_debug - update to 6.4.0-15061.28.coco15sp6.1
kernel-obs-qa - update to 6.4.0-150600.23.60.2
dtb-rockchip - update to 6.4.0-150600.23.60.3
dtb-cavium - update to 6.4.0-150600.23.60.3
dtb-amlogic - 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-sprd - 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
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
dtb-amazon - update to 6.4.0-150600.23.60.3
dtb-marvell - update to 6.4.0-150600.23.60.3
dtb-freescale - update to 6.4.0-150600.23.60.3
dtb-broadcom - update to 6.4.0-150600.23.60.3
dtb-apm - update to 6.4.0-150600.23.60.3
dtb-nvidia - 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
dtb-allwinner - update to 6.4.0-150600.23.60.3
dtb-socionext - update to 6.4.0-150600.23.60.3
dtb-hisilicon - update to 6.4.0-150600.23.60.3
kernel-64kb-optional - update to 6.4.0-150600.23.60.4
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.60.4
kernel-debug-devel - update to 6.4.0-150600.23.60.4
kernel-debug-debuginfo - update to 6.4.0-150600.23.60.4
kernel-debug-debugsource - update to 6.4.0-150600.23.60.4
kernel-zfcpdump - update to 6.4.0-150600.23.60.4
kernel-debug-vdso - update to 6.4.0-150600.23.60.4
kernel-kvmsmall - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.60.4
kselftests-kmp-64kb - update to 6.4.0-150600.23.60.4
kernel-64kb - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.60.4
kernel-syms - update to 6.4.0-150600.23.60.4
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.60.4
kernel-kvmsmall-devel - update to 6.4.0-150600.23.60.4
reiserfs-kmp-64kb - 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-debuginfo - update to 6.4.0-150600.23.60.4
kernel-source-vanilla - update to 6.4.0-150600.23.60.4
gfs2-kmp-64kb - update to 6.4.0-150600.23.60.4
ocfs2-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
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.60.4
kernel-64kb-devel - update to 6.4.0-150600.23.60.4
kernel-64kb-extra - update to 6.4.0-150600.23.60.4
cluster-md-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
gfs2-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
dlm-kmp-64kb - update to 6.4.0-150600.23.60.4
ocfs2-kmp-64kb - update to 6.4.0-150600.23.60.4
kernel-zfcpdump-debugsource - update to 6.4.0-150600.23.60.4
kernel-zfcpdump-debuginfo - update to 6.4.0-150600.23.60.4
kernel-64kb-debuginfo - update to 6.4.0-150600.23.60.4
kernel-64kb-debugsource - 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
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.60.4
kernel-debug - update to 6.4.0-150600.23.60.4
kernel-devel - update to 6.4.0-150600.23.60.4
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
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
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
cluster-md-kmp-default-debuginfo - update to 6.4.0-150600.23.60.5
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
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
gfs2-kmp-default - update to 6.4.0-150600.23.60.5
ocfs2-kmp-default - update to 6.4.0-150600.23.60.5
cluster-md-kmp-default - update to 6.4.0-150600.23.60.5
kernel-default-optional - update to 6.4.0-150600.23.60.5
kernel-default-devel - update to 6.4.0-150600.23.60.5
kernel-default-debugsource - update to 6.4.0-150600.23.60.5
dlm-kmp-default - update to 6.4.0-150600.23.60.5
kernel-default-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
python3-perf-debuginfo - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
python3-perf - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
perf-debuginfo - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
perf - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
kernel-tools-devel - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
kernel-tools-debuginfo - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
kernel-tools - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
kernel-source - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
kernel-headers - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
kernel-devel - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
kernel-debugsource - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
kernel-debuginfo - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
bpftool-debuginfo - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
bpftool - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
kernel - addressed in versions 6.6.0-101.0.0.93, 6.6.0-102.0.0.105
linux (Ubuntu package) - addressed in versions 6.8.0-60.63, 6.8.0-60.63.1, 6.8.0-60.63.1~22.04.1, 6.8.0-1026.26, 6.8.0-1026.27, 6.8.0-1029.31, 6.8.0-1029.31~22.04.1, 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-6.8 (Ubuntu package) - update to 6.8.0-60.63~22.04.1
linux-gcp (Ubuntu package) - addressed in versions 6.8.0-1012.14, 6.8.0-1030.32, 6.8.0-1030.32~22.04.1
linux-azure-nvidia (Ubuntu package) - update to 6.8.0-1016.17
linux-gke (Ubuntu package) - update to 6.8.0-1025.29
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1026.27~22.04.1
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1028.28, 6.8.0-1029.34, 6.8.0-1029.34~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1028.31, 6.8.0-1028.31.1, 6.8.0-1028.31~22.04.1
linux-realtime (Ubuntu package) - update to 6.8.1-1022.23
linux-aws (Ubuntu package) - update to 6.11.0-1014.15
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