Use-after-free in Linux kernel - CVE-2025-68801

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Main Vulnerability Database Vulnerabilities #VU121378

Use-after-free in Linux kernel - CVE-2025-68801

Published: January 14, 2026


Vulnerability identifier: #VU121378
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-68801
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the mlxsw_sp_neigh_entry_alloc(), mlxsw_sp_nexthop_dead_neigh_replace(), mlxsw_sp_nexthop_neigh_init() and mlxsw_sp_nexthop_neigh_fini() functions in drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c. A local user can escalate privileges on the system.


Affected software

Linux kernel
Debian Linux
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Real Time Module
SUSE Linux Enterprise Live Patching
Public Cloud Module
Legacy Module
Development Tools Module
Basesystem Module
Ubuntu
openEuler
kernel-livepatch-SLE15-SP7-RT_Update_9-debugsource
kernel-livepatch-6_4_0-150700_7_31-rt
kernel-livepatch-6_4_0-150700_7_31-rt-debuginfo
kernel-livepatch-6_4_0-150700_53_31-default-debuginfo
kernel-livepatch-SLE15-SP7_Update_9-debugsource
kernel-livepatch-6_4_0-150700_53_31-default
bpftool
kernel
python3-perf-debuginfo
python3-perf
perf-debuginfo
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-headers
kernel-source
perf
linux-aws-fips (Ubuntu package)
linux (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-raspi (Ubuntu package)
linux-realtime (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux (Debian package)
kernel-source-rt
kernel-devel-rt
kernel-syms-rt
kernel-rt-debugsource
cluster-md-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-rt-debuginfo
ocfs2-kmp-rt-debuginfo
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
kernel-rt-devel
cluster-md-kmp-rt
kernel-rt-devel-debuginfo
dlm-kmp-rt
kernel-rt
kernel-devel-azure
kernel-source-azure
kernel-azure-devel-debuginfo
kernel-azure-debugsource
kernel-syms-azure
kernel-azure-devel
kernel-azure-debuginfo
kernel-azure
kernel-docs
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kernel-default
kernel-macros
kernel-default-debuginfo
kernel-default-devel
kernel-default-devel-debuginfo
kernel-default-debugsource
kernel-64kb-devel
kernel-64kb-devel-debuginfo
kernel-64kb-debugsource
kernel-64kb-debuginfo
kernel-64kb
dlm-kmp-default
kernel-obs-build
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
gfs2-kmp-default
gfs2-kmp-default-debuginfo
cluster-md-kmp-default
dlm-kmp-default-debuginfo
kernel-default-extra-debuginfo
kernel-default-extra
kernel-default-livepatch
kernel-obs-build-debugsource
kernel-syms
kernel-default-livepatch-devel
reiserfs-kmp-default
ocfs2-kmp-default
reiserfs-kmp-default-debuginfo
kernel-default-base
kernel-extra-modules
linux-hwe-6.8 (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-xilinx (Ubuntu package)
linux-oracle (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-lowlatency (Ubuntu package)
linux-gcp-6.8 (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-aws (Ubuntu package)
linux-realtime-6.17 (Ubuntu package)
linux-gcp (Ubuntu package)

How to mitigate CVE-2025-68801

Install update from vendor's repository.

kernel-livepatch-SLE15-SP7-RT_Update_9-debugsource - update to 1-150700.1.3.2
kernel-livepatch-6_4_0-150700_7_31-rt - update to 1-150700.1.3.2
kernel-livepatch-6_4_0-150700_7_31-rt-debuginfo - update to 1-150700.1.3.2
kernel-livepatch-6_4_0-150700_53_31-default-debuginfo - update to 1-150700.15.3.1
kernel-livepatch-SLE15-SP7_Update_9-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_31-default - update to 1-150700.15.3.1
bpftool - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
kernel - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
python3-perf-debuginfo - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
python3-perf - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
perf-debuginfo - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
kernel-tools-devel - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
kernel-tools-debuginfo - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
kernel-tools - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
bpftool-debuginfo - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
kernel-debuginfo - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
kernel-debugsource - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
kernel-devel - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
kernel-headers - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
kernel-source - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
perf - addressed in versions 5.10.0-299.0.0.202, 6.6.0-138.0.0.119, 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
linux-aws-fips (Ubuntu package) - addressed in versions 5.15.0.173.100, 5.15.0-173.183+fips1, 5.15.0.1103.93, 5.15.0.1103.99, 5.15.0-1103.110+fips1, 5.15.0-1103.112+fips1, 6.8.0-110.110+fips2, 6.8.0-1052.55+fips1, 6.8.0-1054.57+fips1
linux (Ubuntu package) - addressed in versions 5.15.0.173.146, 5.15.0.173.161, 5.15.0-173.183, 5.15.0-1055.55, 5.15.0-1055.55~20.04.1, 5.15.0.1067.70, 5.15.0-1067.71, 5.15.0.1086.85, 5.15.0-1086.94, 5.15.0.1095.91, 5.15.0-1095.100, 5.15.0.1097.93, 5.15.0.1097.100, 5.15.0-1097.100~20.04.1, 5.15.0.1098.98, 5.15.0-1098.99, 5.15.0-1098.104, 5.15.0.1100.96, 5.15.0-1100.106, 5.15.0.1103.99, 5.15.0.1103.106, 5.15.0-1103.110, 5.15.0-1103.112~20.04.1, 6.8.0-110.110, 6.8.0-110.110.1, 6.8.0-110.110.1~22.04.1, 6.8.0-1037.40, 6.8.0-1050.56, 6.8.0-1051.51, 6.8.0-1052.55~22.04.1, 6.8.0-1054.57, 6.17.0-22.22, 6.17.0-1010.11
linux-aws-5.15 (Ubuntu package) - addressed in versions 5.15.0-173.183~20.04.1, 5.15.0-1098.104~20.04.1, 5.15.0.1099.98, 5.15.0-1099.105, 5.15.0-1100.106~20.04.1, 5.15.0-1103.110~20.04.1, 5.15.0-1103.112~20.04.1
linux-nvidia-tegra-igx (Ubuntu package) - addressed in versions 5.15.0-1044.44, 5.15.0.1044.46
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1094.96, 5.15.0.1094.98
linux-raspi (Ubuntu package) - addressed in versions 5.15.0.1097.95, 5.15.0-1097.100, 6.17.0-1014.14
linux-realtime (Ubuntu package) - addressed in versions 5.15.0.1102.106, 5.15.0-1102.111, 6.8.1-1047.48
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1109.94, 5.15.0-1109.118+fips1, 6.8.0-1054.60+fips1
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1109.107, 5.15.0-1109.118, 6.8.0-1054.60, 6.17.0-1013.13, 6.17.0-1013.13~24.04.1, 6.17.0-1020.20
linux-azure-5.15 (Ubuntu package) - update to 5.15.0-1110.119~20.04.1
linux (Debian package) - addressed in versions 6.1.162-1, 6.12.69-1
kernel-source-rt - update to 6.4.0-150700.7.31.1
kernel-devel-rt - update to 6.4.0-150700.7.31.1
kernel-syms-rt - update to 6.4.0-150700.7.31.1
kernel-rt-debugsource - update to 6.4.0-150700.7.31.2
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.31.2
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.31.2
ocfs2-kmp-rt - update to 6.4.0-150700.7.31.2
kernel-rt-debuginfo - update to 6.4.0-150700.7.31.2
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.31.2
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.31.2
gfs2-kmp-rt - update to 6.4.0-150700.7.31.2
kernel-rt-devel - update to 6.4.0-150700.7.31.2
cluster-md-kmp-rt - update to 6.4.0-150700.7.31.2
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.31.2
dlm-kmp-rt - update to 6.4.0-150700.7.31.2
kernel-rt - update to 6.4.0-150700.7.31.2
kernel-devel-azure - update to 6.4.0-150700.20.27.1
kernel-source-azure - update to 6.4.0-150700.20.27.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.20.27.1
kernel-azure-debugsource - update to 6.4.0-150700.20.27.1
kernel-syms-azure - update to 6.4.0-150700.20.27.1
kernel-azure-devel - update to 6.4.0-150700.20.27.1
kernel-azure-debuginfo - update to 6.4.0-150700.20.27.1
kernel-azure - update to 6.4.0-150700.20.27.1
kernel-devel - update to 6.4.0-150700.53.31.1
kernel-docs - update to 6.4.0-150700.53.31.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.31.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.31.1
kernel-zfcpdump - update to 6.4.0-150700.53.31.1
kernel-default - update to 6.4.0-150700.53.31.1
kernel-macros - update to 6.4.0-150700.53.31.1
kernel-default-debuginfo - update to 6.4.0-150700.53.31.1
kernel-default-devel - update to 6.4.0-150700.53.31.1
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.31.1
kernel-default-debugsource - update to 6.4.0-150700.53.31.1
kernel-64kb-devel - update to 6.4.0-150700.53.31.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.31.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.31.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.31.1
kernel-64kb - update to 6.4.0-150700.53.31.1
dlm-kmp-default - update to 6.4.0-150700.53.31.1
kernel-obs-build - update to 6.4.0-150700.53.31.1
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.31.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.31.1
gfs2-kmp-default - update to 6.4.0-150700.53.31.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.31.1
cluster-md-kmp-default - update to 6.4.0-150700.53.31.1
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.31.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.31.1
kernel-default-extra - update to 6.4.0-150700.53.31.1
kernel-default-livepatch - update to 6.4.0-150700.53.31.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.31.1
kernel-syms - update to 6.4.0-150700.53.31.1
kernel-source - update to 6.4.0-150700.53.31.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.31.1
reiserfs-kmp-default - update to 6.4.0-150700.53.31.1
ocfs2-kmp-default - update to 6.4.0-150700.53.31.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.31.1
kernel-default-base - update to 6.4.0-150700.53.31.1.150700.17.21.1
kernel-extra-modules - addressed in versions 6.6.0-138.0.0.132, 6.6.0-145.3.14.145
linux-hwe-6.8 (Ubuntu package) - addressed in versions 6.8.0-110.110~22.04.1, 6.8.0-1051.51~22.04.1, 6.8.0-1052.56
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1022.22
linux-xilinx (Ubuntu package) - update to 6.8.0-1029.30
linux-oracle (Ubuntu package) - addressed in versions 6.8.0-1049.50, 6.8.0-1049.50~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1051.54, 6.8.0-1051.54~22.04.1
linux-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1051.54.1
linux-gcp-6.8 (Ubuntu package) - update to 6.8.0-1054.57~22.04.1
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2042.43
linux-aws (Ubuntu package) - addressed in versions 6.17.0-22.22~24.04.1, 6.17.0-1011.11, 6.17.0-1011.11~24.04.1, 6.17.0-1012.12, 6.17.0-1012.12~24.04.1
linux-realtime-6.17 (Ubuntu package) - update to 6.17.0-1010.11~24.04.1
linux-gcp (Ubuntu package) - addressed in versions 6.17.0-1012.12, 6.17.0-1012.12~24.04.1

External References

Related Security Bulletins