Improper locking in Linux kernel - CVE-2025-23134

Vulnerability identifier: #VU107737

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-2025-23134

CWE-ID: CWE-667

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the snd_timer_user_copy_id(), snd_timer_user_ginfo() and snd_timer_user_gstatus() functions in sound/core/timer.c. A local user can perform a denial of service (DoS) attack.

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
Ubuntu
kernel-livepatch-6_4_0-150700_7_3-rt
kernel-livepatch-SLE15-SP7-RT_Update_1-debugsource
kernel-livepatch-6_4_0-150700_7_3-rt-debuginfo
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-rt
kernel-rt-debuginfo
ocfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-rt-debugsource
cluster-md-kmp-rt-debuginfo
kernel-rt_debug-debuginfo
cluster-md-kmp-rt
kernel-syms-rt
kernel-rt_debug
kernel-devel-rt
kernel-source-rt
gfs2-kmp-rt
kernel-rt-devel-debuginfo
dlm-kmp-rt-debuginfo
kernel-rt_debug-debugsource
dlm-kmp-rt
kernel-rt_debug-devel
kernel-rt_debug-devel-debuginfo
gfs2-kmp-rt-debuginfo
kernel-rt-devel
kernel-source-azure
kernel-devel-azure
kernel-syms-azure
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-azure-devel-debuginfo
kernel-azure-devel
kernel-azure
reiserfs-kmp-default
kernel-source
ocfs2-kmp-default
kernel-default-livepatch-devel
kernel-default-livepatch
kernel-default-extra-debuginfo
kernel-default-extra
ocfs2-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default-debuginfo
kernel-syms
cluster-md-kmp-default
dlm-kmp-default-debuginfo
gfs2-kmp-default
kernel-default-debuginfo
kernel-default-debugsource
reiserfs-kmp-default-debuginfo
kernel-default
kernel-64kb-devel
kernel-64kb
kernel-obs-build
kernel-obs-build-debugsource
kernel-docs
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
kernel-macros
kernel-devel
kernel-default-devel
kernel-default-devel-debuginfo
kernel-64kb-devel-debuginfo
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-default-base
linux (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-azure (Ubuntu package)
linux-oem-6.11 (Ubuntu package)
linux-aws (Ubuntu package)

Install update from vendor's website.

Linux kernel - update to 6.14.2
kernel-livepatch-6_4_0-150700_7_3-rt - 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-debuginfo - 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-rt - update to 6.4.0-150700.7.3.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.3.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.3.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.3.1
kernel-rt-debugsource - update to 6.4.0-150700.7.3.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.3.1
kernel-rt_debug-debuginfo - update to 6.4.0-150700.7.3.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.3.1
kernel-syms-rt - update to 6.4.0-150700.7.3.1
kernel-rt_debug - update to 6.4.0-150700.7.3.1
kernel-devel-rt - update to 6.4.0-150700.7.3.1
kernel-source-rt - update to 6.4.0-150700.7.3.1
gfs2-kmp-rt - update to 6.4.0-150700.7.3.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.3.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.3.1
kernel-rt_debug-debugsource - update to 6.4.0-150700.7.3.1
dlm-kmp-rt - update to 6.4.0-150700.7.3.1
kernel-rt_debug-devel - update to 6.4.0-150700.7.3.1
kernel-rt_debug-devel-debuginfo - update to 6.4.0-150700.7.3.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.3.1
kernel-rt-devel - update to 6.4.0-150700.7.3.1
kernel-source-azure - update to 6.4.0-150700.20.3.1
kernel-devel-azure - update to 6.4.0-150700.20.3.1
kernel-syms-azure - update to 6.4.0-150700.20.3.1
kernel-azure-debuginfo - update to 6.4.0-150700.20.3.1
kernel-azure-debugsource - update to 6.4.0-150700.20.3.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.20.3.1
kernel-azure-devel - update to 6.4.0-150700.20.3.1
kernel-azure - update to 6.4.0-150700.20.3.1
reiserfs-kmp-default - update to 6.4.0-150700.53.3.1
kernel-source - update to 6.4.0-150700.53.3.1
ocfs2-kmp-default - update to 6.4.0-150700.53.3.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.3.1
kernel-default-livepatch - update to 6.4.0-150700.53.3.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.3.1
kernel-default-extra - update to 6.4.0-150700.53.3.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.3.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.3.1
dlm-kmp-default - update to 6.4.0-150700.53.3.1
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.3.1
kernel-syms - update to 6.4.0-150700.53.3.1
cluster-md-kmp-default - update to 6.4.0-150700.53.3.1
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.3.1
gfs2-kmp-default - update to 6.4.0-150700.53.3.1
kernel-default-debuginfo - update to 6.4.0-150700.53.3.1
kernel-default-debugsource - update to 6.4.0-150700.53.3.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.3.1
kernel-default - update to 6.4.0-150700.53.3.1
kernel-64kb-devel - update to 6.4.0-150700.53.3.1
kernel-64kb - update to 6.4.0-150700.53.3.1
kernel-obs-build - update to 6.4.0-150700.53.3.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.3.1
kernel-docs - update to 6.4.0-150700.53.3.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.3.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.3.1
kernel-zfcpdump - update to 6.4.0-150700.53.3.1
kernel-macros - update to 6.4.0-150700.53.3.1
kernel-devel - update to 6.4.0-150700.53.3.1
kernel-default-devel - update to 6.4.0-150700.53.3.1
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.3.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.3.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.3.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.3.1
kernel-default-base - update to 6.4.0-150700.53.3.1.150700.17.2.1
linux (Ubuntu package) - addressed in versions 6.11.0-28.28, 6.11.0-28.28~24.04.1, 6.11.0-1011.11, 6.11.0-1014.14, 6.11.0-1015.16, 6.11.0-1016.16, 6.11.0-1016.16~24.04.1, 6.11.0-1017.18, 6.14.0-22.22, 6.14.0-1004.4, 6.14.0-1007.7, 6.14.0-1008.8
linux-lowlatency (Ubuntu package) - addressed in versions 6.11.0-1015.16, 6.11.0-1015.16~24.04.2
linux-azure (Ubuntu package) - addressed in versions 6.11.0-1018.18, 6.11.0-1018.18~24.04.1, 6.14.0-1007.7
linux-oem-6.11 (Ubuntu package) - update to 6.11.0-1024.24
linux-aws (Ubuntu package) - addressed in versions 6.14.0-1007.7, 6.14.0-1007.7+1

• https://git.kernel.org/stable/c/15291b561d8cc835a2eea76b394070cf8e072771
• https://git.kernel.org/stable/c/296f7a9e15aab276db11206cbc1e2ae1215d7862
• https://git.kernel.org/stable/c/3424c8f53bc63c87712a7fc22dc13d0cc85fb0d6
• https://git.kernel.org/stable/c/b074f47e55df93832bbbca1b524c501e6fea1c0d
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14.2

• Improper locking in Linux kernel core
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux
• Ubuntu update for linux-oem-6.11
• Ubuntu update for linux-lowlatency
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws