Use-after-free in Linux kernel - CVE-2025-40012

Vulnerability identifier: #VU117400

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-2025-40012

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

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

The vulnerability exists due to a use-after-free error within the smc_lo_register_dmb() and __smc_lo_unregister_dmb() functions in net/smc/smc_loopback.c. A local user can escalate privileges on the system.

Linux kernel
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
Development Tools Module
SUSE Real Time Module
SUSE Linux Enterprise Live Patching
Public Cloud Module
Legacy Module
Basesystem Module
openEuler
kernel-livepatch-SLE15-SP7-RT_Update_6-debugsource
kernel-livepatch-6_4_0-150700_7_22-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_22-rt
kernel-livepatch-SLE15-SP7_Update_6-debugsource
kernel-livepatch-6_4_0-150700_53_22-default
kernel-livepatch-6_4_0-150700_53_22-default-debuginfo
kernel-rt-devel
kernel-rt-debuginfo
kernel-rt-debugsource
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
dlm-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt
kernel-syms-rt
kernel-rt
cluster-md-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
gfs2-kmp-rt
kernel-source-rt
kernel-devel-rt
dlm-kmp-rt
kernel-azure-devel
kernel-azure
kernel-azure-debugsource
kernel-syms-azure
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
kernel-devel-azure
kernel-source-azure
kernel-default-livepatch
kernel-64kb-debuginfo
kernel-default-livepatch-devel
kernel-default-extra
kernel-default-extra-debuginfo
kernel-64kb
kernel-64kb-devel
kernel-64kb-devel-debuginfo
kernel-64kb-debugsource
kernel-default
kernel-default-debuginfo
kernel-default-debugsource
kernel-default-devel-debuginfo
kernel-default-devel
kernel-macros
kernel-devel
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-obs-build-debugsource
kernel-docs
gfs2-kmp-default
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default
ocfs2-kmp-default-debuginfo
dlm-kmp-default-debuginfo
cluster-md-kmp-default
dlm-kmp-default
gfs2-kmp-default-debuginfo
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-source
kernel-obs-build
kernel-syms
kernel-default-base
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-headers
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
python3-perf-debuginfo
kernel-extra-modules

Install update from vendor's repository.

kernel-livepatch-SLE15-SP7-RT_Update_6-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_22-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_22-rt - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7_Update_6-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_22-default - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_22-default-debuginfo - update to 1-150700.15.3.1
kernel-rt-devel - update to 6.4.0-150700.7.22.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.22.1
kernel-rt-debugsource - update to 6.4.0-150700.7.22.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.22.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.22.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.22.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.22.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.22.1
kernel-syms-rt - update to 6.4.0-150700.7.22.1
kernel-rt - update to 6.4.0-150700.7.22.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.22.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.22.1
gfs2-kmp-rt - update to 6.4.0-150700.7.22.1
kernel-source-rt - update to 6.4.0-150700.7.22.1
kernel-devel-rt - update to 6.4.0-150700.7.22.1
dlm-kmp-rt - update to 6.4.0-150700.7.22.1
kernel-azure-devel - update to 6.4.0-150700.20.18.1
kernel-azure - update to 6.4.0-150700.20.18.1
kernel-azure-debugsource - update to 6.4.0-150700.20.18.1
kernel-syms-azure - update to 6.4.0-150700.20.18.1
kernel-azure-debuginfo - update to 6.4.0-150700.20.18.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.20.18.1
kernel-devel-azure - update to 6.4.0-150700.20.18.1
kernel-source-azure - update to 6.4.0-150700.20.18.1
kernel-default-livepatch - update to 6.4.0-150700.53.22.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.22.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.22.1
kernel-default-extra - update to 6.4.0-150700.53.22.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.22.1
kernel-64kb - update to 6.4.0-150700.53.22.1
kernel-64kb-devel - update to 6.4.0-150700.53.22.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.22.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.22.1
kernel-default - update to 6.4.0-150700.53.22.1
kernel-default-debuginfo - update to 6.4.0-150700.53.22.1
kernel-default-debugsource - update to 6.4.0-150700.53.22.1
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.22.1
kernel-default-devel - update to 6.4.0-150700.53.22.1
kernel-macros - update to 6.4.0-150700.53.22.1
kernel-devel - update to 6.4.0-150700.53.22.1
kernel-zfcpdump - update to 6.4.0-150700.53.22.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.22.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.22.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.22.1
kernel-docs - update to 6.4.0-150700.53.22.1
gfs2-kmp-default - update to 6.4.0-150700.53.22.1
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
ocfs2-kmp-default - update to 6.4.0-150700.53.22.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
cluster-md-kmp-default - update to 6.4.0-150700.53.22.1
dlm-kmp-default - update to 6.4.0-150700.53.22.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
reiserfs-kmp-default - update to 6.4.0-150700.53.22.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.22.1
kernel-source - update to 6.4.0-150700.53.22.1
kernel-obs-build - update to 6.4.0-150700.53.22.1
kernel-syms - update to 6.4.0-150700.53.22.1
kernel-default-base - update to 6.4.0-150700.53.22.1.150700.17.15.1
kernel - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
bpftool - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
bpftool-debuginfo - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
kernel-debuginfo - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
kernel-debugsource - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
kernel-devel - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
kernel-headers - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
kernel-source - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
kernel-tools - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
kernel-tools-debuginfo - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
kernel-tools-devel - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
perf - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
perf-debuginfo - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
python3-perf - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
python3-perf-debuginfo - addressed in versions 6.6.0-121.0.0.111, 6.6.0-121.0.0.123, 6.6.0-121.0.0.124
kernel-extra-modules - update to 6.6.0-121.0.0.124

• https://git.kernel.org/stable/c/14fc4fdae42e34d7ee871b292ac2ecc61c2c5de7
• https://git.kernel.org/stable/c/a35c04de2565db191726b5741e6b66a35002c652
• https://git.kernel.org/stable/c/d5411685dc2f6ac7bdf01a0a204d56cae38c6cf6

• Use-after-free in Linux kernel smc
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• openEuler 24.03 LTS SP1 update for kernel
• openEuler 24.03 LTS update for kernel
• openEuler 24.03 LTS SP2 update for kernel