Out-of-bounds read in Linux kernel - CVE-2026-68293

Vulnerability identifier: #VU142021

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-2026-68293

CWE-ID: CWE-125

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 an out-of-bounds read in the MCIA register handling in the mlx5 driver when processing module EEPROM reads via ethtool. A local user can trigger a read of module EEPROM data to cause a denial of service.

The issue is detected on kernels built with FORTIFY_SOURCE, where it results in a kernel BUG.

Linux kernel
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Micro
SUSE Linux Micro Extras
Red Hat Enterprise Linux for x86_64
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
SUSE Linux Enterprise Live Patching
Development Tools Module
SUSE Real Time Module
Basesystem Module
Legacy Module
Public Cloud Module
Ubuntu
linux (Ubuntu package)
linux-lowlatency (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-realtime (Ubuntu package)
linux-fips (Ubuntu package)
linux-gkeop (Ubuntu package)
linux-gke (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-gcp-fips (Ubuntu package)
kernel-livepatch-SLE15-SP7-RT_Update_20-debugsource
kernel-livepatch-6_4_0-150700_7_75-rt
kernel-livepatch-6_4_0-150700_7_75-rt-debuginfo
kernel-livepatch-SLE15-SP7_Update_21-debugsource
kernel-livepatch-6_4_0-150700_53_81-default-debuginfo
kernel-livepatch-6_4_0-150700_53_81-default
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel-obs-build-debugsource
kernel-default-debugsource
kernel-default-devel-debuginfo
kernel-default
kernel-kvmsmall-debuginfo
kernel-kvmsmall-debugsource
kernel-default-debuginfo
kernel-rt-debuginfo
kernel-rt-livepatch
kernel-rt-debugsource
kernel-obs-build
kernel-rt
kernel-devel-rt
kernel-source-rt
kernel-kvmsmall
kernel-devel
kernel-macros
kernel-source
kernel-default-livepatch
kernel-syms
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb
kernel-default-devel
kernel-default-base
kernel-syms-rt
dlm-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
cluster-md-kmp-rt
kernel-rt-devel
dlm-kmp-rt
gfs2-kmp-rt-debuginfo
ocfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
gfs2-kmp-rt
cluster-md-kmp-rt-debuginfo
cluster-md-kmp-default
gfs2-kmp-default
kernel-64kb-debuginfo
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-zfcpdump
kernel-default-extra-debuginfo
cluster-md-kmp-default-debuginfo
dlm-kmp-default
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
dlm-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-64kb-devel-debuginfo
kernel-default-extra
kernel-azure-devel-debuginfo
kernel-azure-debuginfo
kernel-azure-debugsource
kernel-azure-devel
kernel-azure
kernel-default-livepatch-devel
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-docs
kernel-rt-64k-debug-modules (Red Hat package)
kernel-rt-64k-debug-modules-core (Red Hat package)
kernel-rt-64k-debug-modules-extra (Red Hat package)
kernel-rt-64k-debuginfo (Red Hat package)
kernel-rt-64k-devel (Red Hat package)
kernel-rt-64k-modules (Red Hat package)
kernel-64k-devel-matched (Red Hat package)
kernel-rt-64k-modules-core (Red Hat package)
kernel-rt-64k-modules-extra (Red Hat package)
kernel-cross-headers (Red Hat package)
kernel-tools-libs-devel (Red Hat package)
libperf (Red Hat package)
kernel-rt-devel (Red Hat package)
kernel-rt-core (Red Hat package)
kernel-rt-debug (Red Hat package)
kernel-rt-debug-core (Red Hat package)
kernel-rt-debug-debuginfo (Red Hat package)
kernel-rt-debug-devel (Red Hat package)
kernel-rt-debug-modules (Red Hat package)
kernel-rt-debug-modules-core (Red Hat package)
kernel-rt-debug-modules-extra (Red Hat package)
kernel-rt-debuginfo (Red Hat package)
kernel-rt-modules (Red Hat package)
kernel-rt-modules-core (Red Hat package)
kernel-rt-modules-extra (Red Hat package)
kernel-tools (Red Hat package)
kernel-tools-debuginfo (Red Hat package)
kernel-tools-libs (Red Hat package)
kernel-uki-virt (Red Hat package)
kernel-uki-virt-addons (Red Hat package)
kernel-debuginfo (Red Hat package)
kernel-debug (Red Hat package)
kernel-debug-core (Red Hat package)
kernel-debug-debuginfo (Red Hat package)
kernel-debug-devel (Red Hat package)
kernel-debug-devel-matched (Red Hat package)
kernel-debug-modules (Red Hat package)
kernel-debug-modules-core (Red Hat package)
kernel-debug-modules-extra (Red Hat package)
kernel-debug-uki-virt (Red Hat package)
kernel-rt-64k-debug-debuginfo (Red Hat package)
kernel-debuginfo-common-x86_64 (Red Hat package)
kernel-devel (Red Hat package)
kernel-devel-matched (Red Hat package)
kernel-headers (Red Hat package)
kernel-modules (Red Hat package)
kernel-modules-core (Red Hat package)
kernel-modules-extra (Red Hat package)
kernel-modules-extra-matched (Red Hat package)
python3-perf (Red Hat package)
kernel-rt-64k-debug-devel (Red Hat package)
kernel-rt-64k-debug-core (Red Hat package)
kernel-rt-64k-debug (Red Hat package)
kernel-rt-64k-core (Red Hat package)
kernel-rt-64k (Red Hat package)
kernel-debuginfo-common-aarch64 (Red Hat package)
kernel-64k-devel (Red Hat package)
kernel-64k-debuginfo (Red Hat package)
kernel-64k-debug-devel-matched (Red Hat package)
kernel-64k-debug-devel (Red Hat package)
kernel-debuginfo-common-ppc64le (Red Hat package)
kernel-zfcpdump-modules-extra (Red Hat package)
kernel-zfcpdump-modules-core (Red Hat package)
kernel-zfcpdump (Red Hat package)
kernel-zfcpdump-core (Red Hat package)
kernel-zfcpdump-devel (Red Hat package)
kernel-zfcpdump-devel-matched (Red Hat package)
kernel-zfcpdump-modules (Red Hat package)
kernel-debuginfo-common-s390x (Red Hat package)
perf (Red Hat package)
rtla (Red Hat package)
rv (Red Hat package)
linux-nvidia-tegra (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
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, 7.0.0-38.38.1, 7.0.0-1008.9, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14, 7.0.0-1015.15
linux-lowlatency (Ubuntu package) - update to 6.8.0-147.147.1
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) - update to 6.8.0-1071.79
linux-aws (Ubuntu package) - update to 6.8.0-1067.70
linux-ibm (Ubuntu package) - update to 6.8.0-1067.68
linux-oracle (Ubuntu package) - update to 6.8.0-1064.67
linux-azure-fde (Ubuntu package) - update to 6.8.0-1069.76
linux-realtime (Ubuntu package) - update to 6.8.1-1062.63
linux-fips (Ubuntu package) - update to 6.8.0-147.147+fips1
linux-gkeop (Ubuntu package) - update to 6.8.0-1052.56
linux-gke (Ubuntu package) - update to 6.8.0-1066.74
linux-azure-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-gcp-fips (Ubuntu package) - update to 6.8.0-1071.79+fips1
kernel-livepatch-SLE15-SP7-RT_Update_20-debugsource - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_75-rt - update to 1-150700.1.3.1
kernel-livepatch-6_4_0-150700_7_75-rt-debuginfo - update to 1-150700.1.3.1
kernel-livepatch-SLE15-SP7_Update_21-debugsource - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_81-default-debuginfo - update to 1-150700.15.3.1
kernel-livepatch-6_4_0-150700_53_81-default - update to 1-150700.15.3.1
kernel (Red Hat package) - addressed in versions 4.18.0-553.166.1.el8_10, 5.14.0-687.50.1.el9_8
kernel-rt (Red Hat package) - addressed in versions 4.18.0-553.166.1.rt7.507.el8_10, 6.12.0-211.58.1.el10_2
kernel-obs-build-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-devel-debuginfo - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-kvmsmall-debuginfo - update to 6.4.0-52.1
kernel-kvmsmall-debugsource - update to 6.4.0-52.1
kernel-default-debuginfo - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-rt-debuginfo - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-rt-livepatch - update to 6.4.0-52.1
kernel-rt-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-obs-build - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-rt - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-devel-rt - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-source-rt - addressed in versions 6.4.0-52.1, 6.4.0-150700.7.75.1
kernel-kvmsmall - update to 6.4.0-52.1
kernel-devel - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-macros - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-source - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-livepatch - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-syms - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-64kb-devel - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-64kb-debugsource - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-64kb - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-devel - addressed in versions 6.4.0-52.1, 6.4.0-150700.53.81.1
kernel-default-base - addressed in versions 6.4.0-52.1.21.35, 6.4.0-52.1.21.36, 6.4.0-150700.53.81.1.150700.17.45.1
kernel-syms-rt - update to 6.4.0-150700.7.75.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.75.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.75.1
kernel-rt-devel - update to 6.4.0-150700.7.75.1
dlm-kmp-rt - update to 6.4.0-150700.7.75.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.75.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
gfs2-kmp-rt - update to 6.4.0-150700.7.75.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.75.1
cluster-md-kmp-default - update to 6.4.0-150700.53.81.1
gfs2-kmp-default - update to 6.4.0-150700.53.81.1
kernel-64kb-debuginfo - update to 6.4.0-150700.53.81.1
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.81.1
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.81.1
kernel-zfcpdump - update to 6.4.0-150700.53.81.1
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.81.1
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.81.1
dlm-kmp-default - update to 6.4.0-150700.53.81.1
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.81.1
ocfs2-kmp-default - update to 6.4.0-150700.53.81.1
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.81.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.81.1
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.81.1
kernel-default-extra - update to 6.4.0-150700.53.81.1
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.81.1
kernel-azure-debuginfo - update to 6.4.0-150700.53.81.1
kernel-azure-debugsource - update to 6.4.0-150700.53.81.1
kernel-azure-devel - update to 6.4.0-150700.53.81.1
kernel-azure - update to 6.4.0-150700.53.81.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.81.1
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.81.1
reiserfs-kmp-default - update to 6.4.0-150700.53.81.1
kernel-docs - update to 6.4.0-150700.53.81.1
kernel-rt-64k-debug-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-64k-devel-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-cross-headers (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-tools-libs-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
libperf (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debug-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-tools (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-tools-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-tools-libs (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-uki-virt (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-uki-virt-addons (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-devel-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debug-uki-virt (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debuginfo-common-x86_64 (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-devel-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-headers (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-modules-extra-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
python3-perf (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-debug (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-rt-64k (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debuginfo-common-aarch64 (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-64k-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-64k-debuginfo (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-64k-debug-devel-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-64k-debug-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debuginfo-common-ppc64le (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-modules-extra (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-modules-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-core (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-devel (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-devel-matched (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-zfcpdump-modules (Red Hat package) - update to 6.12.0-211.58.1.el10_2
kernel-debuginfo-common-s390x (Red Hat package) - update to 6.12.0-211.58.1.el10_2
perf (Red Hat package) - update to 6.12.0-211.58.1.el10_2
rtla (Red Hat package) - update to 6.12.0-211.58.1.el10_2
rv (Red Hat package) - update to 6.12.0-211.58.1.el10_2
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1036.39+1
linux-gcp-7.0 (Ubuntu package) - addressed in versions 7.0.0-38.38~24.04.4, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1015.15
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/11c057d23465c7a5817a7284c896d19d54c0b616
• https://git.kernel.org/stable/c/5be4eebd5a3a198dab0adcd550e1cadca79bdfed
• https://git.kernel.org/stable/c/87b39a8c875ca744b7de69af0a8ef8874cffccf1
• https://git.kernel.org/stable/c/88b2a16ddac3357e3f1d528e758b51e2c945d546

• Out-of-bounds read in Linux kernel linux mlx5
• SUSE update for the Linux Kernel
• Red Hat Enterprise Linux 8 update for kernel-rt
• Red Hat Enterprise Linux 10 update for kernel
• Red Hat Enterprise Linux 8 update for kernel
• Red Hat Enterprise Linux 9 update for kernel
• Ubuntu update for linux-gcp-7.0
• Ubuntu update for linux-azure-7.0
• Ubuntu update for linux-nvidia-tegra
• 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
• 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