Improper input validation in Linux kernel - CVE-2026-64280

Vulnerability identifier: #VU139709

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-2026-64280

CWE-ID: CWE-20

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper input validation in afu_ioctl_dma_map() when handling a DFL_FPGA_PORT_DMA_MAP ioctl request with a user-supplied length. A local user can provide an excessively large length value to cause a denial of service.

Linux kernel
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
Debian Linux
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Live Patching
Legacy Module
Public Cloud Module
Development Tools Module
Basesystem Module
SUSE Real Time Module
Ubuntu
linux (Ubuntu package)
linux-kvm (Ubuntu package)
linux-gcp (Ubuntu package)
linux-aws (Ubuntu package)
linux-azure (Ubuntu package)
linux-oracle (Ubuntu package)
linux-lowlatency (Ubuntu package)
linux-gke (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-lowlatency-hwe-5.15 (Ubuntu package)
linux-hwe-5.15 (Ubuntu package)
linux-fips (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-realtime (Ubuntu package)
linux-ibm-5.15 (Ubuntu package)
linux-azure-fde-5.15 (Ubuntu package)
linux-intel-iotg (Ubuntu package)
linux-gkeop (Ubuntu package)
linux-ibm (Ubuntu package)
linux-intel-iotg-5.15 (Ubuntu package)
linux-oracle-5.15 (Ubuntu package)
linux-gcp-5.15 (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure-fde (Ubuntu package)
kgraft-patch-4_12_14-122_336-default
kernel-livepatch-6_4_0-150700_7_81-rt
kernel-livepatch-SLE15-SP7-RT_Update_22-debugsource
kernel-livepatch-6_4_0-150700_7_81-rt-debuginfo
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
kernel-syms
kernel-default
kernel-default-debugsource
kernel-default-kgraft
kernel-default-kgraft-devel
kernel-default-debuginfo
kernel-default-base-debuginfo
ocfs2-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
cluster-md-kmp-default
gfs2-kmp-default-debuginfo
kernel-default-base
dlm-kmp-default-debuginfo
ocfs2-kmp-default
gfs2-kmp-default
kernel-default-devel
dlm-kmp-default
kernel-default-devel-debuginfo
kernel-source
kernel-macros
kernel-default-man
kernel-devel
kernel-syms-rt
kernel-rt-devel-debuginfo
dlm-kmp-rt
kernel-rt-debugsource
cluster-md-kmp-rt-debuginfo
ocfs2-kmp-rt-debuginfo
kernel-rt-debuginfo
cluster-md-kmp-rt
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
gfs2-kmp-rt
kernel-rt-devel
dlm-kmp-rt-debuginfo
kernel-devel-rt
kernel-source-rt
kernel-rt
kernel-obs-build-debugsource
kernel-obs-build
kernel-zfcpdump-debuginfo
kernel-64kb
kernel-64kb-devel
kernel-zfcpdump-debugsource
kernel-zfcpdump
kernel-default-livepatch
kernel-64kb-devel-debuginfo
kernel-64kb-debuginfo
kernel-64kb-debugsource
kernel-docs
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-default-livepatch-devel
kernel-default-extra-debuginfo
kernel-default-extra
kernel-azure-devel
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
kernel-azure-debugsource
kernel-azure
linux (Debian package)
linux-oracle-7.0 (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-nvidia-7.0 (Ubuntu package)
linux-raspi (Ubuntu package)
linux-nvidia-bos (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, 7.0.0-31.31~24.04.1, 7.0.0-31.31, 7.0.0-31.31.1, 7.0.0-1006.7, 7.0.0-1011.11~24.04.1, 7.0.0-1012.12~24.04.1, 7.0.0-1012.12
linux-gcp (Ubuntu package) - update to 6.8.0-1071.79
linux-aws (Ubuntu package) - update to 6.8.0-1067.70
linux-azure (Ubuntu package) - addressed in versions 6.8.0-1071.79, 7.0.0-1011.11, 7.0.0-1014.14
linux-oracle (Ubuntu package) - update to 6.8.0-1064.67
linux-lowlatency (Ubuntu package) - update to 6.8.0-147.147.1
linux-gke (Ubuntu package) - update to 6.8.0-1066.74
linux-fips (Ubuntu package) - update to 6.8.0-147.147+fips1
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1070.72, 6.8.0-1035.38
linux-nvidia (Ubuntu package) - update to 7.0.0-1018.18
linux-nvidia-tegra-igx (Ubuntu package) - update to 5.15.0-1059.59
linux-realtime (Ubuntu package) - update to 6.8.1-1062.63
linux-gkeop (Ubuntu package) - update to 6.8.0-1052.56
linux-ibm (Ubuntu package) - addressed in versions 6.8.0-1067.68, 7.0.0-1013.13
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1070.72~20.04.1
linux-gcp-fips (Ubuntu package) - update to 6.8.0-1071.79+fips1
linux-aws-fips (Ubuntu package) - update to 6.8.0-1067.70+fips1
linux-azure-fips (Ubuntu package) - update to 6.8.0-1071.79+fips1
linux-azure-fde (Ubuntu package) - update to 6.8.0-1069.76
kgraft-patch-4_12_14-122_336-default - update to 1-8.3.1
kernel-livepatch-6_4_0-150700_7_81-rt - update to 1-150700.1.3.1
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-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
kernel-syms - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.1
kernel-default - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
kernel-default-debugsource - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
kernel-default-kgraft - update to 4.12.14-122.336.1
kernel-default-kgraft-devel - update to 4.12.14-122.336.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
kernel-default-base-debuginfo - update to 4.12.14-122.336.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
cluster-md-kmp-default - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
kernel-default-base - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3.150700.17.49.2
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
ocfs2-kmp-default - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
gfs2-kmp-default - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
kernel-default-devel - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
dlm-kmp-default - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
kernel-source - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
kernel-macros - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
kernel-default-man - update to 4.12.14-122.336.1
kernel-devel - addressed in versions 4.12.14-122.336.1, 6.4.0-150700.53.87.3
kernel-syms-rt - update to 6.4.0-150700.7.81.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.81.1
dlm-kmp-rt - update to 6.4.0-150700.7.81.1
kernel-rt-debugsource - update to 6.4.0-150700.7.81.1
cluster-md-kmp-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-debuginfo - update to 6.4.0-150700.7.81.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.81.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.81.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.81.1
gfs2-kmp-rt - update to 6.4.0-150700.7.81.1
kernel-rt-devel - update to 6.4.0-150700.7.81.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.81.1
kernel-devel-rt - update to 6.4.0-150700.7.81.1
kernel-source-rt - update to 6.4.0-150700.7.81.1
kernel-rt - update to 6.4.0-150700.7.81.1
kernel-obs-build-debugsource - update to 6.4.0-150700.53.87.2
kernel-obs-build - update to 6.4.0-150700.53.87.2
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 - update to 6.4.0-150700.53.87.3
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.87.3
kernel-zfcpdump - update to 6.4.0-150700.53.87.3
kernel-default-livepatch - update to 6.4.0-150700.53.87.3
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.87.3
kernel-64kb-debuginfo - update to 6.4.0-150700.53.87.3
kernel-64kb-debugsource - update to 6.4.0-150700.53.87.3
kernel-docs - update to 6.4.0-150700.53.87.3
reiserfs-kmp-default - 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-extra-debuginfo - update to 6.4.0-150700.53.87.3
kernel-default-extra - update to 6.4.0-150700.53.87.3
kernel-azure-devel - update to 6.4.0-150700.53.87.3
kernel-azure-debuginfo - update to 6.4.0-150700.53.87.3
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.87.3
kernel-azure-debugsource - update to 6.4.0-150700.53.87.3
kernel-azure - update to 6.4.0-150700.53.87.3
linux (Debian package) - update to 6.12.101-1
linux-oracle-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-gcp-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1013.13
linux-azure-7.0 (Ubuntu package) - update to 7.0.0-1014.14~24.04.1
linux-nvidia-7.0 (Ubuntu package) - update to 7.0.0-1018.18~24.04.1
linux-raspi (Ubuntu package) - update to 7.0.0-1019.19
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2018.18

• https://git.kernel.org/stable/c/59070040fd12e0b78d7b4d341d9f9a183237c5ff
• https://git.kernel.org/stable/c/fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231
• https://git.kernel.org/stable/c/fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27

• Improper input validation in Linux kernel fpga driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-oracle-7.0
• Ubuntu update for linux-azure
• Ubuntu update for linux-azure-7.0
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-nvidia-bos
• Ubuntu update for linux-ibm
• Ubuntu update for linux-raspi
• Ubuntu update for linux-nvidia-tegra
• Ubuntu update for linux-nvidia-7.0
• Ubuntu update for linux, linux-aws, linux-aws-fips and more
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• Ubuntu update for linux-azure, linux-azure-fde, linux-azure-fips
• Ubuntu update for linux-nvidia-tegra, linux-nvidia-tegra-5.15, linux-nvidia-tegra-igx
• Ubuntu update for linux, linux-aws, linux-aws-5.15 and more