ID:12950 - Exploit for Exposure of resource to wrong sphere in Linux kernel - CVE-2026-23274

Vulnerability identifier: #VU124171

Vulnerability risk: Low

CVE-ID: CVE-2026-23274

CWE-ID: CWE-668

Exploitation vector: Local access

Vulnerable software:
Linux kernel
SUSE Linux Enterprise Server 15 SP5
Debian Linux
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Manager Server
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
SUSE Linux Micro
SUSE Linux Enterprise Live Patching
Basesystem Module
Development Tools Module
Legacy Module
Public Cloud Module
SUSE Real Time Module
openSUSE Leap
Ubuntu
openEuler
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https://github.com/NebuSec/CyberMeowfia

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

The vulnerability exists due to improper input validation in the netfilter xt_IDLETIMER module when processing timer rules with reused labels. A local user can insert a revision 0 IDLETIMER rule with a label that was previously used by a revision 1 rule with XT_IDLETIMER_ALARM, leading to modification of an uninitialized timer_list object, which can trigger debugobjects warnings and potentially cause a kernel panic when panic_on_warn=1 is enabled.

Exploitation requires the ability to load netfilter rules. The impact is limited to denial of service via system crash under specific kernel configurations.

Install security update from vendor's repository.