Improper error handling in Linux kernel - CVE-2026-23056

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Main Vulnerability Database Vulnerabilities #VU122368

Improper error handling in Linux kernel - CVE-2026-23056

Published: February 5, 2026


Vulnerability identifier: #VU122368
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-2026-23056
CWE-ID: CWE-388
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 improper error handling within the uacce_vma_close() function in drivers/misc/uacce/uacce.c. A local user can perform a denial of service (DoS) attack.


Affected software

Linux kernel
Debian Linux
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
Legacy Module
Public Cloud Module
Basesystem Module
SUSE Real Time Module
SUSE Linux Enterprise Live Patching
Development Tools Module
Ubuntu
openEuler
kernel-livepatch-SLE15-SP7-RT_Update_10-debugsource
kernel-livepatch-6_4_0-150700_7_34-rt
kernel-livepatch-6_4_0-150700_7_34-rt-debuginfo
kernel-livepatch-SLE15-SP7_Update_10-debugsource
kernel-livepatch-6_4_0-150700_53_34-default
kernel-livepatch-6_4_0-150700_53_34-default-debuginfo
linux (Ubuntu package)
linux-fips (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-xilinx-zynqmp (Ubuntu package)
linux-azure (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-ibm (Ubuntu package)
linux-raspi (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux (Debian package)
kernel-rt-debuginfo
kernel-rt
kernel-source-rt
kernel-devel-rt
cluster-md-kmp-rt-debuginfo
dlm-kmp-rt
dlm-kmp-rt-debuginfo
kernel-rt-debugsource
cluster-md-kmp-rt
ocfs2-kmp-rt
kernel-rt-devel
kernel-rt-devel-debuginfo
ocfs2-kmp-rt-debuginfo
kernel-syms-rt
gfs2-kmp-rt
gfs2-kmp-rt-debuginfo
kernel-devel
kernel-default-devel
kernel-default-debuginfo
kernel-default-devel-debuginfo
kernel-default-debugsource
kernel-default
kernel-64kb-debuginfo
kernel-64kb-devel-debuginfo
kernel-64kb-debugsource
kernel-64kb-devel
kernel-64kb
kernel-default-extra-debuginfo
kernel-zfcpdump
kernel-macros
cluster-md-kmp-default-debuginfo
kernel-default-extra
kernel-default-livepatch
dlm-kmp-default
kernel-default-livepatch-devel
gfs2-kmp-default
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
dlm-kmp-default-debuginfo
cluster-md-kmp-default
ocfs2-kmp-default-debuginfo
kernel-azure-devel-debuginfo
kernel-azure-devel
kernel-azure-debugsource
kernel-azure-debuginfo
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-docs
kernel-obs-build
kernel-obs-build-debugsource
kernel-syms
kernel-source
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-azure
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
linux-nvidia (Ubuntu package)
linux-nvidia-6.8 (Ubuntu package)
linux-azure-fde-6.17 (Ubuntu package)
linux-gcp-6.17 (Ubuntu package)
linux-oracle-6.17 (Ubuntu package)
linux-azure-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)

How to mitigate CVE-2026-23056

Install update from vendor's repository.

kernel-livepatch-SLE15-SP7-RT_Update_10-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_34-rt - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_34-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7_Update_10-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_34-default - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_34-default-debuginfo - update to 1-150700.15.3.1
linux (Ubuntu package) - addressed in versions 5.15.0.175.148, 5.15.0-175.185, 5.15.0-175.185~20.04.1, 5.15.0.176.161, 5.15.0-176.186, 5.15.0.1088.87, 5.15.0-1088.96, 5.15.0.1100.100, 5.15.0-1100.101, 5.15.0.1101.100, 5.15.0-1101.107~20.04.1, 5.15.0.1102.98, 5.15.0-1102.108, 5.15.0.1105.101, 5.15.0.1105.108, 5.15.0-1105.112, 5.15.0-1105.112~20.04.1, 5.15.0-1105.114, 6.8.0-117.117, 6.8.0-117.117.1, 6.8.0-117.117.1~22.04.1, 6.8.0-1041.44, 6.8.0-1054.60, 6.8.0-1055.56, 6.8.0-1055.56~22.04.1, 6.8.0-1055.58+fips1, 6.8.0-1056.60, 6.8.0-1058.61, 6.8.0-1058.61+fips1, 6.8.0-2045.46, 6.8.1-1051.52, 6.8.1-1051.52~22.04.1
linux-fips (Ubuntu package) - addressed in versions 5.15.0.176.102, 5.15.0-176.186+fips1, 5.15.0.1105.95, 5.15.0-1105.114+fips1, 6.8.0-116.116+fips1
linux-hwe-5.15 (Ubuntu package) - update to 5.15.0-176.186~20.04.1
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1046.46+1, 5.15.0.1046.48, 5.15.0-1057.57, 6.8.0-1024.24
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1057.57~20.04.1
linux-xilinx-zynqmp (Ubuntu package) - addressed in versions 5.15.0.1070.73, 5.15.0-1070.74
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1097.93, 5.15.0-1097.102, 5.15.0.1100.99, 5.15.0-1100.106, 5.15.0-1100.106~20.04.1, 5.15.0-1102.108~20.04.1, 5.15.0.1110.108, 5.15.0-1110.119, 6.8.0-1056.62
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1097.99, 5.15.0.1097.101, 5.15.0.1104.108, 5.15.0-1104.113
linux-ibm (Ubuntu package) - addressed in versions 5.15.0.1099.95, 5.15.0-1099.102, 5.15.0-1099.102~20.04.1
linux-raspi (Ubuntu package) - addressed in versions 5.15.0.1099.97, 5.15.0-1099.102
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1110.95, 5.15.0-1110.119+fips1
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-rt-debuginfo - update to 6.4.0-150700.7.34.1
kernel-rt - update to 6.4.0-150700.7.34.1
kernel-source-rt - update to 6.4.0-150700.7.34.1
kernel-devel-rt - update to 6.4.0-150700.7.34.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.34.1
dlm-kmp-rt - update to 6.4.0-150700.7.34.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.34.1
kernel-rt-debugsource - update to 6.4.0-150700.7.34.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.34.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.34.1
kernel-rt-devel - update to 6.4.0-150700.7.34.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.34.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.34.1
kernel-syms-rt - update to 6.4.0-150700.7.34.1
gfs2-kmp-rt - update to 6.4.0-150700.7.34.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.34.1
kernel-devel - update to 6.4.0-150700.53.34.1
kernel-default-devel - update to 6.4.0-150700.53.34.1
kernel-default-debuginfo - update to 6.4.0-150700.53.34.1
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.34.1
kernel-default-debugsource - update to 6.4.0-150700.53.34.1
kernel-default - update to 6.4.0-150700.53.34.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.34.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.34.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.34.1
kernel-64kb-devel - update to 6.4.0-150700.53.34.1
kernel-64kb - update to 6.4.0-150700.53.34.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.34.1
kernel-zfcpdump - update to 6.4.0-150700.53.34.1
kernel-macros - update to 6.4.0-150700.53.34.1
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.34.1
kernel-default-extra - update to 6.4.0-150700.53.34.1
kernel-default-livepatch - update to 6.4.0-150700.53.34.1
dlm-kmp-default - update to 6.4.0-150700.53.34.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.34.1
gfs2-kmp-default - update to 6.4.0-150700.53.34.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.34.1
ocfs2-kmp-default - update to 6.4.0-150700.53.34.1
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.34.1
cluster-md-kmp-default - update to 6.4.0-150700.53.34.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.34.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.34.1
kernel-azure-devel - update to 6.4.0-150700.53.34.1
kernel-azure-debugsource - update to 6.4.0-150700.53.34.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.34.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.34.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.34.1
kernel-docs - update to 6.4.0-150700.53.34.1
kernel-obs-build - update to 6.4.0-150700.53.34.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.34.1
kernel-syms - update to 6.4.0-150700.53.34.1
kernel-source - update to 6.4.0-150700.53.34.1
reiserfs-kmp-default - update to 6.4.0-150700.53.34.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.34.1
kernel-azure - update to 6.4.0-150700.53.34.1
kernel-default-base - update to 6.4.0-150700.53.34.1.150700.17.23.1
kernel - update to 6.6.0-145.0.12.138
bpftool - update to 6.6.0-145.0.12.138
bpftool-debuginfo - update to 6.6.0-145.0.12.138
kernel-debuginfo - update to 6.6.0-145.0.12.138
kernel-debugsource - update to 6.6.0-145.0.12.138
kernel-devel - update to 6.6.0-145.0.12.138
kernel-headers - update to 6.6.0-145.0.12.138
kernel-source - update to 6.6.0-145.0.12.138
kernel-tools - update to 6.6.0-145.0.12.138
kernel-tools-debuginfo - update to 6.6.0-145.0.12.138
kernel-tools-devel - update to 6.6.0-145.0.12.138
perf - update to 6.6.0-145.0.12.138
perf-debuginfo - update to 6.6.0-145.0.12.138
python3-perf - update to 6.6.0-145.0.12.138
python3-perf-debuginfo - update to 6.6.0-145.0.12.138
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1054.57, 6.8.0-1054.57.1
linux-nvidia-6.8 (Ubuntu package) - update to 6.8.0-1054.57~22.04.1
linux-azure-fde-6.17 (Ubuntu package) - update to 6.17.0-1018.18~24.04.1
linux-gcp-6.17 (Ubuntu package) - addressed in versions 6.17.0-1018.20~24.04.1, 6.17.0-1021.24~24.04.1
linux-oracle-6.17 (Ubuntu package) - addressed in versions 6.17.0-1019.19~24.04.3, 6.17.0-1019.19~24.04.3+1
linux-azure-6.17 (Ubuntu package) - update to 6.17.0-1021.21~24.04.1
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1030.30
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1031.31

External References

Related Security Bulletins