Out-of-bounds read in Linux kernel - CVE-2026-43197

Vulnerability identifier: #VU130541

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-2026-43197

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 netconsole_write when processing console messages that are not nul-terminated. A local user can trigger processing of a specially crafted message to cause a denial of service.

Linux kernel
openEuler
Ubuntu
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel
kernel-extra-modules
linux (Ubuntu package)
linux-hwe-6.17 (Ubuntu package)
linux-azure-fde-6.17 (Ubuntu package)
linux-raspi (Ubuntu package)
linux-azure-6.17 (Ubuntu package)
linux-nvidia-6.17 (Ubuntu package)
linux-oem-6.17 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
python3-perf-debuginfo - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
python3-perf - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
perf-debuginfo - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
perf - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
kernel-tools-devel - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
kernel-tools-debuginfo - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
kernel-tools - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
kernel-source - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
kernel-headers - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
kernel-devel - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
kernel-debugsource - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
kernel-debuginfo - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
bpftool-debuginfo - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
bpftool - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
kernel - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.16.148
kernel-extra-modules - update to 6.6.0-145.3.16.148
linux (Ubuntu package) - update to 6.17.0-40.40
linux-hwe-6.17 (Ubuntu package) - update to 6.17.0-40.40~24.04.1
linux-azure-fde-6.17 (Ubuntu package) - update to 6.17.0-1018.18~24.04.1
linux-raspi (Ubuntu package) - update to 6.17.0-1021.21
linux-azure-6.17 (Ubuntu package) - update to 6.17.0-1021.21~24.04.1
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1026.26
linux-oem-6.17 (Ubuntu package) - update to 6.17.0-1028.28

• https://git.kernel.org/stable/c/3126a2f98beaec5a554a1fb31c46db1e8542665e
• https://git.kernel.org/stable/c/74ab1456eaa3b2eb986138f9e1f4cb37e73b6f58
• https://git.kernel.org/stable/c/82aec772fca2223bc5774bd9af486fd95766e578

• Out-of-bounds read in Linux kernel net driver
• openEuler 24.03 LTS SP3 update for kernel
• Ubuntu update for linux-oem-6.17
• Ubuntu update for linux
• Ubuntu update for linux-nvidia-6.17
• Ubuntu update for linux-raspi
• Ubuntu update for linux-hwe-6.17
• Ubuntu update for linux-raspi
• Ubuntu update for linux-azure-fde-6.17
• Ubuntu update for linux-azure-6.17
• openEuler 24.03 LTS SP1 update for kernel