Input validation error in Linux kernel - CVE-2026-22989

Vulnerability identifier: #VU121997

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-2026-22989

CWE-ID: CWE-20

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 input validation within the fs/nfsd/state.h. A local user can perform a denial of service (DoS) attack.

Linux kernel
Debian Linux
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Live Patching
Public Cloud Module
Legacy Module
Development Tools Module
Basesystem Module
SUSE Real Time Module
Ubuntu
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-6_4_0-150700_53_34-default-debuginfo
kernel-livepatch-SLE15-SP7_Update_10-debugsource
kernel-livepatch-6_4_0-150700_53_34-default
ocfs2-kmp-rt-debuginfo
kernel-rt-debuginfo
gfs2-kmp-rt
kernel-rt
kernel-source-rt
kernel-devel-rt
cluster-md-kmp-rt-debuginfo
dlm-kmp-rt
kernel-rt-debugsource
cluster-md-kmp-rt
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
kernel-rt-devel
dlm-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
kernel-syms-rt
dlm-kmp-default-debuginfo
reiserfs-kmp-default-debuginfo
cluster-md-kmp-default
ocfs2-kmp-default-debuginfo
kernel-azure-devel-debuginfo
kernel-azure-devel
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-azure
ocfs2-kmp-default
gfs2-kmp-default-debuginfo
gfs2-kmp-default
dlm-kmp-default
cluster-md-kmp-default-debuginfo
kernel-default-extra-debuginfo
kernel-default-extra
kernel-default-livepatch
kernel-default-livepatch-devel
kernel-zfcpdump-debuginfo
kernel-source
kernel-64kb
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb-devel-debuginfo
kernel-64kb-debuginfo
kernel-default
kernel-default-debugsource
kernel-default-devel-debuginfo
kernel-default-debuginfo
kernel-default-devel
kernel-macros
reiserfs-kmp-default
kernel-syms
kernel-obs-build-debugsource
kernel-obs-build
kernel-docs
kernel-zfcpdump-debugsource
kernel-zfcpdump
kernel-devel
kernel-default-base
linux (Debian 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)

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-6_4_0-150700_53_34-default-debuginfo - update to 1-150700.15.3.1
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
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.34.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.34.1
gfs2-kmp-rt - 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
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
gfs2-kmp-rt-debuginfo - 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
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.34.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.34.1
kernel-syms-rt - update to 6.4.0-150700.7.34.1
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.34.1
reiserfs-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-debuginfo - update to 6.4.0-150700.53.34.1
kernel-azure-debugsource - update to 6.4.0-150700.53.34.1
kernel-azure - update to 6.4.0-150700.53.34.1
ocfs2-kmp-default - update to 6.4.0-150700.53.34.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.34.1
gfs2-kmp-default - update to 6.4.0-150700.53.34.1
dlm-kmp-default - 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-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
kernel-default-livepatch-devel - update to 6.4.0-150700.53.34.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.34.1
kernel-source - update to 6.4.0-150700.53.34.1
kernel-64kb - update to 6.4.0-150700.53.34.1
kernel-64kb-devel - update to 6.4.0-150700.53.34.1
kernel-64kb-debugsource - update to 6.4.0-150700.53.34.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.34.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.34.1
kernel-default - update to 6.4.0-150700.53.34.1
kernel-default-debugsource - update to 6.4.0-150700.53.34.1
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.34.1
kernel-default-debuginfo - update to 6.4.0-150700.53.34.1
kernel-default-devel - update to 6.4.0-150700.53.34.1
kernel-macros - update to 6.4.0-150700.53.34.1
reiserfs-kmp-default - update to 6.4.0-150700.53.34.1
kernel-syms - update to 6.4.0-150700.53.34.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.34.1
kernel-obs-build - update to 6.4.0-150700.53.34.1
kernel-docs - update to 6.4.0-150700.53.34.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.34.1
kernel-zfcpdump - update to 6.4.0-150700.53.34.1
kernel-devel - 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
linux (Debian package) - update to 6.12.69-1
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

• https://git.kernel.org/stable/c/d0424066fcd294977f310964bed6f2a487fa4515
• https://git.kernel.org/stable/c/d95499900fe52f3d461ed26b7a30bebea8f12914
• https://git.kernel.org/stable/c/e06c9f6c0f554148d4921c2a15bd054260a054ac

• Input validation error in Linux kernel nfsd
• Debian update for linux
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Ubuntu update for linux-gcp-6.17
• Ubuntu update for linux-oem-6.17
• Ubuntu update for linux-azure-fde-6.17
• Ubuntu update for linux-azure-6.17
• Ubuntu update for linux-oracle-6.17