Off-by-one in Linux kernel - CVE-2026-90289

Vulnerability identifier: #VU151200

CSH Severity: Low

CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90289

CWE-ID: CWE-193

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause an out-of-bounds memory access.

The vulnerability exists due to an off-by-one error in the AMDGPU display manager HDCP per-connector arrays when handling a 32nd display connector. A local user can cause the HDCP code to process a 32nd connector to cause an out-of-bounds memory access.

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
Development Tools Module
SUSE Linux Enterprise Live Patching
Basesystem Module
SUSE Real Time Module
Public Cloud Module
Ubuntu
linux (Ubuntu package)
linux-oracle (Ubuntu package)
linux-gcp (Ubuntu package)
linux-aws (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
kernel-livepatch-SLE15-SP7-RT_Update_22-debugsource
kernel-livepatch-6_4_0-150700_7_81-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_81-rt
kernel-livepatch-SLE15-SP7_Update_23-debugsource
kernel-livepatch-6_4_0-150700_53_87-default-debuginfo
kernel-livepatch-6_4_0-150700_53_87-default
dlm-kmp-rt
kernel-rt-devel
gfs2-kmp-rt
ocfs2-kmp-rt
kernel-rt
kernel-source-rt
kernel-devel-rt
dlm-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
cluster-md-kmp-rt
kernel-rt-debuginfo
ocfs2-kmp-rt-debuginfo
kernel-rt-debugsource
kernel-rt-devel-debuginfo
kernel-syms-rt
cluster-md-kmp-rt-debuginfo
kernel-syms
kernel-obs-build
kernel-obs-build-debugsource
kernel-docs
kernel-source
reiserfs-kmp-default
kernel-64kb-debugsource
kernel-zfcpdump
kernel-64kb-debuginfo
reiserfs-kmp-default-debuginfo
kernel-default-livepatch-devel
kernel-default-livepatch
kernel-azure
kernel-azure-debugsource
kernel-azure-devel-debuginfo
kernel-azure-debuginfo
kernel-azure-devel
kernel-default-extra
kernel-default-extra-debuginfo
kernel-64kb-devel
cluster-md-kmp-default-debuginfo
gfs2-kmp-default
ocfs2-kmp-default-debuginfo
dlm-kmp-default-debuginfo
kernel-default-debugsource
cluster-md-kmp-default
kernel-default-debuginfo
dlm-kmp-default
ocfs2-kmp-default
gfs2-kmp-default-debuginfo
kernel-default
kernel-default-devel
kernel-default-devel-debuginfo
kernel-devel
kernel-macros
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-64kb
kernel-64kb-devel-debuginfo
kernel-default-base
linux (Debian package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - update to 7.0.0-42.42
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
kernel-livepatch-SLE15-SP7-RT_Update_22-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_81-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_81-rt - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7_Update_23-debugsource - update to 1-150700.15.3.2
kernel-livepatch-6_4_0-150700_53_87-default-debuginfo - update to 1-150700.15.3.2
kernel-livepatch-6_4_0-150700_53_87-default - update to 1-150700.15.3.2
dlm-kmp-rt - update to 6.4.0-150700.7.81.1
kernel-rt-devel - update to 6.4.0-150700.7.81.1
gfs2-kmp-rt - update to 6.4.0-150700.7.81.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.81.1
kernel-rt - update to 6.4.0-150700.7.81.1
kernel-source-rt - update to 6.4.0-150700.7.81.1
kernel-devel-rt - update to 6.4.0-150700.7.81.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.81.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.81.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.81.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.81.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.81.1
kernel-rt-debugsource - update to 6.4.0-150700.7.81.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.81.1
kernel-syms-rt - update to 6.4.0-150700.7.81.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.81.1
kernel-syms - update to 6.4.0-150700.53.87.1
kernel-obs-build - update to 6.4.0-150700.53.87.2
kernel-obs-build-debugsource - update to 6.4.0-150700.53.87.2
kernel-docs - update to 6.4.0-150700.53.87.3
kernel-source - update to 6.4.0-150700.53.87.3
reiserfs-kmp-default - update to 6.4.0-150700.53.87.3
kernel-64kb-debugsource - update to 6.4.0-150700.53.87.3
kernel-zfcpdump - update to 6.4.0-150700.53.87.3
kernel-64kb-debuginfo - update to 6.4.0-150700.53.87.3
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.87.3
kernel-default-livepatch-devel - update to 6.4.0-150700.53.87.3
kernel-default-livepatch - update to 6.4.0-150700.53.87.3
kernel-azure - update to 6.4.0-150700.53.87.3
kernel-azure-debugsource - update to 6.4.0-150700.53.87.3
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.87.3
kernel-azure-debuginfo - update to 6.4.0-150700.53.87.3
kernel-azure-devel - update to 6.4.0-150700.53.87.3
kernel-default-extra - update to 6.4.0-150700.53.87.3
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.87.3
kernel-64kb-devel - update to 6.4.0-150700.53.87.3
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.87.3
gfs2-kmp-default - update to 6.4.0-150700.53.87.3
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.87.3
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.87.3
kernel-default-debugsource - update to 6.4.0-150700.53.87.3
cluster-md-kmp-default - update to 6.4.0-150700.53.87.3
kernel-default-debuginfo - update to 6.4.0-150700.53.87.3
dlm-kmp-default - update to 6.4.0-150700.53.87.3
ocfs2-kmp-default - update to 6.4.0-150700.53.87.3
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.87.3
kernel-default - update to 6.4.0-150700.53.87.3
kernel-default-devel - update to 6.4.0-150700.53.87.3
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.87.3
kernel-devel - update to 6.4.0-150700.53.87.3
kernel-macros - update to 6.4.0-150700.53.87.3
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.87.3
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.87.3
kernel-64kb - update to 6.4.0-150700.53.87.3
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.87.3
kernel-default-base - update to 6.4.0-150700.53.87.3.150700.17.49.2
linux (Debian package) - update to 6.12.115-2

• https://git.kernel.org/stable/c/0fa116a17b69a28712cdf209318e345b676d7f6c
• https://git.kernel.org/stable/c/261e0fe4e2c99f687114b64b10b98db964b475f4

• Off-by-one in Linux kernel display amdgpu_dm driver
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more