Information disclosure in Linux kernel - CVE-2026-74278

Vulnerability identifier: #VU142910

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-74278

CWE-ID: CWE-200

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to improper exposure of sensitive information in bounce_error_event() when delivering bounce error events to a user client via snd_seq_read(). A local user can trigger delivery of a bounce error event and read the returned fixed-length event to disclose sensitive information.

The issue exposes a raw kernel heap pointer from struct snd_seq_event to userspace through copy_to_user() in the fixed-length event handling path.

Linux kernel
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Micro
SUSE Linux Micro Extras
SUSE Linux Enterprise Live Patching
Public Cloud Module
Legacy Module
SUSE Real Time Module
Development Tools Module
Basesystem Module
Ubuntu
linux (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-raspi (Ubuntu package)
linux-azure (Ubuntu package)
linux-gcp (Ubuntu package)
linux-aws (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oracle (Ubuntu package)
linux-azure-fde (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-realtime (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-lowlatency-hwe-6.8 (Ubuntu package)
linux-fips (Ubuntu package)
linux-azure-fde-6.8 (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-azure-6.8 (Ubuntu package)
linux-nvidia-lowlatency (Ubuntu package)
linux-gkeop (Ubuntu package)
linux-gke (Ubuntu package)
linux-ibm-6.8 (Ubuntu package)
linux-gcp-6.8 (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-raspi-realtime (Ubuntu package)
linux-realtime-6.8 (Ubuntu package)
linux-nvidia-bos (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oracle-7.0 (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-aws-7.0 (Ubuntu package)
linux-nvidia-7.0 (Ubuntu package)
kgraft-patch-4_12_14-122_339-default
kgraft-patch-4_12_14-122_328-default
kernel-livepatch-6_4_0-150700_7_78-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_78-rt
kernel-livepatch-SLE15-SP7-RT_Update_21-debugsource
kernel-livepatch-6_4_0-150700_53_84-default
kernel-livepatch-SLE15-SP7_Update_22-debugsource
kernel-livepatch-6_4_0-150700_53_84-default-debuginfo
kernel-default-debugsource
kernel-default
kernel-default-man
kernel-macros
kernel-devel
kernel-source
kernel-default-devel-debuginfo
kernel-default-base
cluster-md-kmp-default
kernel-default-devel
kernel-default-base-debuginfo
dlm-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-syms
kernel-default-kgraft
kernel-default-debuginfo
kernel-default-kgraft-devel
ocfs2-kmp-default
dlm-kmp-default
gfs2-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
gfs2-kmp-default
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt-debugsource
kernel-rt-debuginfo
kernel-rt-devel-debuginfo
kernel-rt-devel
dlm-kmp-rt
kernel-syms-rt
cluster-md-kmp-rt
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-source-rt
kernel-devel-rt
kernel-rt
kernel-64kb
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-zfcpdump
kernel-azure-debuginfo
kernel-64kb-devel-debuginfo
kernel-azure-devel-debuginfo
kernel-default-extra
kernel-default-extra-debuginfo
kernel-azure-debugsource
kernel-azure
kernel-default-livepatch
kernel-default-livepatch-devel
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-obs-build-debugsource
kernel-obs-build
kernel-docs
kernel-azure-devel
kernel-64kb-debugsource
kernel-64kb-devel
kernel-64kb-debuginfo
linux-azure-7.0 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 6.8.0-147.147, 7.0.0-38.38
linux-lowlatency (Ubuntu package) - update to 6.8.0-147.147.1
linux-raspi (Ubuntu package) - addressed in versions 6.8.0-1068.72, 7.0.0-1023.23
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1071.79, 7.0.0-1016.16, 7.0.0-1017.17
linux-gcp (Ubuntu package) - addressed in versions 6.8.0-1071.79, 7.0.0-1014.14
linux-aws (Ubuntu package) - addressed in versions 6.8.0-1067.70, 7.0.0-1014.14
linux-ibm (Ubuntu package) - addressed in versions 6.8.0-1067.68, 7.0.0-1015.15
linux-oracle (Ubuntu package) - addressed in versions 6.8.0-1064.67, 7.0.0-1013.13
linux-azure-fde (Ubuntu package) - update to 6.8.0-1069.76
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1067.70, 7.0.0-1025.26
linux-realtime (Ubuntu package) - addressed in versions 6.8.1-1062.63, 7.0.0-38.38.1
linux-hwe-6.8 (Ubuntu package) - update to 6.8.0-149.149~22.04.1
linux-lowlatency-hwe-6.8 (Ubuntu package) - update to 6.8.0-149.149.1~22.04.1
linux-fips (Ubuntu package) - update to 6.8.0-147.147+fips1
linux-azure-fde-6.8 (Ubuntu package) - update to 6.8.0-1071.78~22.04.1
linux-aws-6.8 (Ubuntu package) - update to 6.8.0-1069.74~22.04.1
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1067.71~22.04.1
linux-azure-6.8 (Ubuntu package) - update to 6.8.0-1073.82~22.04.1
linux-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1067.70.1
linux-gkeop (Ubuntu package) - update to 6.8.0-1052.56
linux-gke (Ubuntu package) - addressed in versions 6.8.0-1066.74, 7.0.0-1008.9
linux-ibm-6.8 (Ubuntu package) - update to 6.8.0-1069.70~22.04.1
linux-gcp-6.8 (Ubuntu package) - update to 6.8.0-1073.81~22.04.1
linux-aws-fips (Ubuntu package) - update to 6.8.0-1067.70+fips1
linux-gcp-fips (Ubuntu package) - update to 6.8.0-1071.79+fips1
linux-azure-fips (Ubuntu package) - update to 6.8.0-1071.79+fips1
linux-raspi-realtime (Ubuntu package) - update to 6.8.0-2056.58
linux-realtime-6.8 (Ubuntu package) - update to 6.8.1-1064.65~22.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2022.23
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-38.38~24.04.4
linux-oracle-7.0 (Ubuntu package) - update to 7.0.0-1013.13~24.04.1
linux-gcp-7.0 (Ubuntu package) - update to 7.0.0-1014.14~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1015.15
linux-aws-7.0 (Ubuntu package) - update to 7.0.0-1014.14~24.04.1
linux-nvidia-7.0 (Ubuntu package) - update to 7.0.0-1024.25~24.04.1
kgraft-patch-4_12_14-122_339-default - update to 1-8.3.1
kgraft-patch-4_12_14-122_328-default - update to 1-8.5.1
kernel-livepatch-6_4_0-150700_7_78-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_78-rt - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7-RT_Update_21-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_53_84-default - update to 1-150700.15.3.1
kernel-livepatch-SLE15-SP7_Update_22-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_84-default-debuginfo - update to 1-150700.15.3.1
kernel-default-debugsource - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1, 6.4.0-159998.55.1
kernel-default - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1, 6.4.0-159998.55.1
kernel-default-man - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1
kernel-macros - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
kernel-devel - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
kernel-source - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1, 6.4.0-159998.55.1
kernel-default-base - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1.150700.17.47.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
kernel-default-devel - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1, 6.4.0-159998.55.1
kernel-default-base-debuginfo - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
kernel-syms - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1, 6.4.0-159998.55.1
kernel-default-kgraft - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
kernel-default-kgraft-devel - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
dlm-kmp-default - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
gfs2-kmp-default - addressed in versions 4.12.14-122.328.1, 4.12.14-122.339.1, 6.4.0-150700.53.84.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.78.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.78.1
kernel-rt-debugsource - update to 6.4.0-150700.7.78.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.78.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.78.1
kernel-rt-devel - update to 6.4.0-150700.7.78.1
dlm-kmp-rt - update to 6.4.0-150700.7.78.1
kernel-syms-rt - update to 6.4.0-150700.7.78.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.78.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.78.1
gfs2-kmp-rt - update to 6.4.0-150700.7.78.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.78.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.78.1
kernel-source-rt - update to 6.4.0-150700.7.78.1
kernel-devel-rt - update to 6.4.0-150700.7.78.1
kernel-rt - update to 6.4.0-150700.7.78.1
kernel-64kb - addressed in versions 6.4.0-150700.53.84.1, 6.4.0-159998.55.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.84.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.84.1
kernel-zfcpdump - update to 6.4.0-150700.53.84.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.84.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.84.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.84.1
kernel-default-extra - update to 6.4.0-150700.53.84.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.84.1
kernel-azure-debugsource - update to 6.4.0-150700.53.84.1
kernel-azure - update to 6.4.0-150700.53.84.1
kernel-default-livepatch - update to 6.4.0-150700.53.84.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.84.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.84.1
reiserfs-kmp-default - update to 6.4.0-150700.53.84.1
kernel-obs-build-debugsource - addressed in versions 6.4.0-150700.53.84.1, 6.4.0-159998.55.1
kernel-obs-build - addressed in versions 6.4.0-150700.53.84.1, 6.4.0-159998.55.1
kernel-docs - update to 6.4.0-150700.53.84.1
kernel-azure-devel - update to 6.4.0-150700.53.84.1
kernel-64kb-debugsource - addressed in versions 6.4.0-150700.53.84.1, 6.4.0-159998.55.1
kernel-64kb-devel - addressed in versions 6.4.0-150700.53.84.1, 6.4.0-159998.55.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.84.1
linux-azure-7.0 (Ubuntu package) - addressed in versions 7.0.0-1016.16~24.04.1, 7.0.0-1017.17~24.04.1

• https://git.kernel.org/stable/c/0527a56cb327021cb73167cfddf0e49efa043500
• https://git.kernel.org/stable/c/93d260ce43a81df579c98bee92b91316df9c1c57
• https://git.kernel.org/stable/c/dae23c545eb5a2be3b27a82fd0f611894fb8ab69
• https://git.kernel.org/stable/c/efc86691e4d8083d9e380ea95042c2cf679f65fd

• Information disclosure in Linux kernel core seq
• SUSE update for the Linux Kernel
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-azure-7.0
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-oem-7.0
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Ubuntu update for linux, linux-aws, linux-aws-fips and more
• Ubuntu update for linux-azure, linux-azure-fde, linux-azure-fips
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Ubuntu update for linux-aws-7.0
• Ubuntu update for linux-nvidia-7.0, linux-nvidia-bos
• Ubuntu update for linux-azure-6.8, linux-azure-fde-6.8
• Ubuntu update for linux-oracle-6.8, linux-raspi, linux-raspi-realtime
• Ubuntu update for linux-aws-6.8, linux-gcp-6.8, linux-ibm-6.8 and more
• Ubuntu update for linux-raspi
• Ubuntu update for linux-nvidia-lowlatency
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-hwe-6.8