Use of Uninitialized Variable in Linux kernel - CVE-2026-74673

Vulnerability identifier: #VU144678

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-74673

CWE-ID: CWE-457

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to an uninitialized stack-based structure in evdev event handling functions when copying input_event structures to userspace. A local user can read crafted event data from the evdev client buffer to disclose sensitive information.

The issue affects padding bytes in struct input_event on architectures where explicit or implicit padding is present.

Linux kernel
Debian Linux
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Live Patching
kgraft-patch-4_12_14-122_328-default
dlm-kmp-default
kernel-default-man
kernel-macros
kernel-devel
kernel-source
kernel-default-devel-debuginfo
kernel-default-base
kernel-default-devel
cluster-md-kmp-default
gfs2-kmp-default
ocfs2-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
ocfs2-kmp-default
kernel-default-base-debuginfo
dlm-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-syms
kernel-default-kgraft
kernel-default-debuginfo
kernel-default-kgraft-devel
kernel-default-debugsource
kernel-default
linux (Debian package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kgraft-patch-4_12_14-122_328-default - update to 1-8.5.1
dlm-kmp-default - update to 4.12.14-122.328.1
kernel-default-man - update to 4.12.14-122.328.1
kernel-macros - update to 4.12.14-122.328.1
kernel-devel - update to 4.12.14-122.328.1
kernel-source - update to 4.12.14-122.328.1
kernel-default-devel-debuginfo - update to 4.12.14-122.328.1
kernel-default-base - update to 4.12.14-122.328.1
kernel-default-devel - update to 4.12.14-122.328.1
cluster-md-kmp-default - update to 4.12.14-122.328.1
gfs2-kmp-default - update to 4.12.14-122.328.1
ocfs2-kmp-default-debuginfo - update to 4.12.14-122.328.1
gfs2-kmp-default-debuginfo - update to 4.12.14-122.328.1
ocfs2-kmp-default - update to 4.12.14-122.328.1
kernel-default-base-debuginfo - update to 4.12.14-122.328.1
dlm-kmp-default-debuginfo - update to 4.12.14-122.328.1
cluster-md-kmp-default-debuginfo - update to 4.12.14-122.328.1
kernel-syms - update to 4.12.14-122.328.1
kernel-default-kgraft - update to 4.12.14-122.328.1
kernel-default-debuginfo - update to 4.12.14-122.328.1
kernel-default-kgraft-devel - update to 4.12.14-122.328.1
kernel-default-debugsource - update to 4.12.14-122.328.1
kernel-default - update to 4.12.14-122.328.1
linux (Debian package) - update to 6.12.105-1

• https://git.kernel.org/stable/c/06a286b320236508d02ab2ccc9496352748652a8
• https://git.kernel.org/stable/c/7d17e9454a9af3ec7aebb88b41a9deedd5b19a6b
• https://git.kernel.org/stable/c/7e55ca1080f09d9f7112c7f20ac31f682c1f2374
• https://git.kernel.org/stable/c/90f305f2c7a30257c683e13f4bf7c798eea992a0
• https://git.kernel.org/stable/c/bd3c4108a56de34380edab670065e86283cb3029
• https://git.kernel.org/stable/c/c6d5fa46c1ee25d068fc730fd377f0f54188d290
• https://git.kernel.org/stable/c/d2e3839419ac4047835762c4d7712bda1101b57e
• https://git.kernel.org/stable/c/e748811d9b80a3e101110ff4b3c612e5fca54d98

• Use of Uninitialized Variable in Linux kernel input driver
• Debian update for linux
• SUSE update for the Linux Kernel