Buffer overflow in Linux kernel - CVE-2025-21758

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Main Vulnerability Database Vulnerabilities #VU105082

Buffer overflow in Linux kernel - CVE-2025-21758

Published: February 27, 2025 / Updated: May 11, 2025


Vulnerability identifier: #VU105082
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-2025-21758
CWE-ID: CWE-119
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 memory corruption within the mld_newpack() function in net/ipv6/mcast.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Live Patching
Public Cloud Module
SUSE Real Time Module
Confidential Computing Module
Development Tools Module
Legacy Module
Basesystem Module
openSUSE Leap
Ubuntu
openEuler
kgraft-patch-4_12_14-122_258-default
kernel-livepatch-SLE15-SP6-RT_Update_11-debugsource
kernel-livepatch-6_4_0-150600_10_39-rt-debuginfo
kernel-livepatch-6_4_0-150600_10_39-rt
kernel-livepatch-6_4_0-150700_7_3-rt-debuginfo
kernel-livepatch-SLE15-SP7-RT_Update_1-debugsource
kernel-livepatch-6_4_0-150700_7_3-rt
kernel-livepatch-6_4_0-150700_53_3-default
kernel-livepatch-6_4_0-150700_53_3-default-debuginfo
kernel-livepatch-SLE15-SP7_Update_1-debugsource
kernel-syms
kernel-default-devel
dlm-kmp-default
gfs2-kmp-default
cluster-md-kmp-default
kernel-default-base-debuginfo
cluster-md-kmp-default-debuginfo
kernel-default-man
dlm-kmp-default-debuginfo
kernel-default-debugsource
kernel-default-devel-debuginfo
kernel-default-base
ocfs2-kmp-default
kernel-default-debuginfo
ocfs2-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
kernel-default-kgraft
kernel-default
kernel-devel
kernel-macros
kernel-source
kernel-default-kgraft-devel
linux (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-aws (Ubuntu package)
linux-azure (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-gke (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-gcp (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-azure-fips (Ubuntu package)
kernel-coco_debug
kernel-coco
kernel-coco_debug-debuginfo
kernel-syms-coco
kernel-coco-devel
kernel-coco_debug-devel
kernel-coco-debugsource
reiserfs-kmp-coco
kernel-coco_debug-debugsource
kernel-coco_debug-devel-debuginfo
kernel-coco-debuginfo
kernel-coco-vdso-debuginfo
reiserfs-kmp-coco-debuginfo
kernel-devel-coco
kernel-source-coco
kernel-azure-optional-debuginfo
kernel-azure-optional
kernel-azure-vdso
kernel-devel-azure
kernel-syms-azure
reiserfs-kmp-azure
kselftests-kmp-azure
kernel-azure-devel-debuginfo
kernel-source-azure
kselftests-kmp-azure-debuginfo
gfs2-kmp-azure-debuginfo
kernel-azure-extra-debuginfo
dlm-kmp-azure
kernel-azure-extra
reiserfs-kmp-azure-debuginfo
kernel-azure-debugsource
kernel-azure-devel
cluster-md-kmp-azure-debuginfo
ocfs2-kmp-azure
gfs2-kmp-azure
kernel-azure-vdso-debuginfo
kernel-azure
cluster-md-kmp-azure
ocfs2-kmp-azure-debuginfo
dlm-kmp-azure-debuginfo
kernel-azure-debuginfo
reiserfs-kmp-rt
kernel-rt
gfs2-kmp-rt
kernel-rt_debug-vdso-debuginfo
kernel-rt-livepatch-devel
kselftests-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
reiserfs-kmp-rt-debuginfo
kernel-source-rt
kernel-devel-rt
kernel-rt-devel
kernel-rt-extra-debuginfo
kernel-syms-rt
kernel-rt_debug-debuginfo
kernel-rt_debug-vdso
kernel-rt_debug-devel-debuginfo
kernel-rt-debuginfo
ocfs2-kmp-rt
kernel-rt-optional
kernel-rt_debug
dlm-kmp-rt
kernel-rt_debug-debugsource
kselftests-kmp-rt
kernel-rt_debug-devel
kernel-rt-vdso
kernel-rt-extra
kernel-rt-debugsource
cluster-md-kmp-rt
dlm-kmp-rt-debuginfo
kernel-rt-vdso-debuginfo
kernel-rt-optional-debuginfo
kernel-rt-devel-debuginfo
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-default-extra
kernel-default-extra-debuginfo
kernel-default-livepatch
kernel-default-livepatch-devel
kernel-64kb
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb-debuginfo
kernel-64kb-devel-debuginfo
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-docs
kernel-obs-build-debugsource
kernel-obs-build
bpftool
kernel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-headers
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
linux-aws-6.8 (Ubuntu package)
linux-oracle (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-lowlatency (Ubuntu package)

How to mitigate CVE-2025-21758

Install update from vendor's website.

Linux kernel - update to 6.1.129
kgraft-patch-4_12_14-122_258-default - update to 1-8.3.1
kernel-livepatch-SLE15-SP6-RT_Update_11-debugsource - update to 1-150600.1.3.2
kernel-livepatch-6_4_0-150600_10_39-rt-debuginfo - update to 1-150600.1.3.2
kernel-livepatch-6_4_0-150600_10_39-rt - update to 1-150600.1.3.2
kernel-livepatch-6_4_0-150700_7_3-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7-RT_Update_1-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_3-rt - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_53_3-default - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_3-default-debuginfo - update to 1-150700.15.3.1
kernel-livepatch-SLE15-SP7_Update_1-debugsource - update to 1-150700.15.3.1
kernel-syms - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-default-devel - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
dlm-kmp-default - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
gfs2-kmp-default - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-default-base-debuginfo - update to 4.12.14-122.258.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-default-man - update to 4.12.14-122.258.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-default-debugsource - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-default-base - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1.150700.17.2.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-default-kgraft - update to 4.12.14-122.258.1
kernel-default - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-devel - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-macros - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-source - addressed in versions 4.12.14-122.258.1, 6.4.0-150700.53.3.1
kernel-default-kgraft-devel - update to 4.12.14-122.258.1
linux (Ubuntu package) - addressed in versions 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, 6.8.0-78.78, 6.8.0-78.78.1, 6.8.0-78.78.1~22.04.1, 6.8.0-1035.37, 6.8.1-1030.31, 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-5.15 (Ubuntu package) - addressed in versions 5.15.0-142.152~20.04.1, 5.15.0.142.152~20.04.1
linux-aws (Ubuntu package) - addressed in versions 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-azure (Ubuntu package) - addressed in versions 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, 6.8.0-1022.23, 6.8.0-1034.39, 6.8.0-1034.39~22.04.1
linux-xilinx-zynqmp (Ubuntu package) - addressed in versions 5.15.0.1050.53, 5.15.0-1050.54
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, 6.8.0-78.78~22.04.1, 6.8.0-1032.36, 6.8.0-1035.38, 6.8.0-1035.38.1, 6.8.0-1035.38~22.04.1, 6.8.0-1035.39
linux-gcp-fips (Ubuntu package) - addressed in versions 5.15.0.1083.73, 5.15.0-1083.92+fips1
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-fips (Ubuntu package) - addressed in versions 5.15.0.1084.80, 5.15.0-1084.91+fips1
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-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1089.74, 5.15.0-1089.98+fips1
kernel-coco_debug - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-syms-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco-devel - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug-devel - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco-debugsource - update to 6.4.0-15061.21.coco15sp6.1
reiserfs-kmp-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug-debugsource - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco_debug-devel-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-coco-vdso-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
reiserfs-kmp-coco-debuginfo - update to 6.4.0-15061.21.coco15sp6.1
kernel-devel-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-source-coco - update to 6.4.0-15061.21.coco15sp6.1
kernel-azure-optional-debuginfo - update to 6.4.0-150600.8.37.1
kernel-azure-optional - update to 6.4.0-150600.8.37.1
kernel-azure-vdso - update to 6.4.0-150600.8.37.1
kernel-devel-azure - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
kernel-syms-azure - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
reiserfs-kmp-azure - update to 6.4.0-150600.8.37.1
kselftests-kmp-azure - update to 6.4.0-150600.8.37.1
kernel-azure-devel-debuginfo - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
kernel-source-azure - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
kselftests-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
gfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
kernel-azure-extra-debuginfo - update to 6.4.0-150600.8.37.1
dlm-kmp-azure - update to 6.4.0-150600.8.37.1
kernel-azure-extra - update to 6.4.0-150600.8.37.1
reiserfs-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
kernel-azure-debugsource - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
kernel-azure-devel - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
cluster-md-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
ocfs2-kmp-azure - update to 6.4.0-150600.8.37.1
gfs2-kmp-azure - update to 6.4.0-150600.8.37.1
kernel-azure-vdso-debuginfo - update to 6.4.0-150600.8.37.1
kernel-azure - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
cluster-md-kmp-azure - update to 6.4.0-150600.8.37.1
ocfs2-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
dlm-kmp-azure-debuginfo - update to 6.4.0-150600.8.37.1
kernel-azure-debuginfo - addressed in versions 6.4.0-150600.8.37.1, 6.4.0-150700.20.3.1
reiserfs-kmp-rt - update to 6.4.0-150600.10.39.1
kernel-rt - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
gfs2-kmp-rt - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kernel-rt_debug-vdso-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-livepatch-devel - update to 6.4.0-150600.10.39.1
kselftests-kmp-rt-debuginfo - update to 6.4.0-150600.10.39.1
ocfs2-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
gfs2-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
cluster-md-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
reiserfs-kmp-rt-debuginfo - update to 6.4.0-150600.10.39.1
kernel-source-rt - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kernel-devel-rt - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kernel-rt-devel - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kernel-rt-extra-debuginfo - update to 6.4.0-150600.10.39.1
kernel-syms-rt - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kernel-rt_debug-debuginfo - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kernel-rt_debug-vdso - update to 6.4.0-150600.10.39.1
kernel-rt_debug-devel-debuginfo - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kernel-rt-debuginfo - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
ocfs2-kmp-rt - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kernel-rt-optional - update to 6.4.0-150600.10.39.1
kernel-rt_debug - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
dlm-kmp-rt - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kernel-rt_debug-debugsource - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kselftests-kmp-rt - update to 6.4.0-150600.10.39.1
kernel-rt_debug-devel - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kernel-rt-vdso - update to 6.4.0-150600.10.39.1
kernel-rt-extra - update to 6.4.0-150600.10.39.1
kernel-rt-debugsource - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
cluster-md-kmp-rt - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
dlm-kmp-rt-debuginfo - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
kernel-rt-vdso-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-optional-debuginfo - update to 6.4.0-150600.10.39.1
kernel-rt-devel-debuginfo - addressed in versions 6.4.0-150600.10.39.1, 6.4.0-150700.7.3.1
reiserfs-kmp-default - update to 6.4.0-150700.53.3.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.3.1
kernel-default-extra - update to 6.4.0-150700.53.3.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.3.1
kernel-default-livepatch - update to 6.4.0-150700.53.3.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.3.1
kernel-64kb - update to 6.4.0-150700.53.3.1
kernel-64kb-devel - update to 6.4.0-150700.53.3.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.3.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.3.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.3.1
kernel-zfcpdump - update to 6.4.0-150700.53.3.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.3.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.3.1
kernel-docs - update to 6.4.0-150700.53.3.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.3.1
kernel-obs-build - update to 6.4.0-150700.53.3.1
bpftool - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
perf - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
perf-debuginfo - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
python3-perf - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
python3-perf-debuginfo - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools-devel - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools-debuginfo - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-tools - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-headers - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-devel - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
bpftool-debuginfo - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-debuginfo - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-debugsource - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
kernel-source - addressed in versions 6.6.0-87.0.0.82, 6.6.0-87.0.0.93
linux-aws-6.8 (Ubuntu package) - addressed in versions 6.8.0-1019.21~22.04.1, 6.8.0-1033.33, 6.8.0-1033.33~22.04.1, 6.8.0-1035.37~22.04.1, 6.8.0-1036.38, 6.8.0-1036.38~22.04.1
linux-oracle (Ubuntu package) - update to 6.8.0-1032.33~22.04.1
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2028.29
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