CVE-2026-23292

Description

A flaw was found in the Linux kernel's scsi: target subsystem. A local user could trigger a recursive locking condition when the target_core_item_dbroot_store() function attempts to open a configfs file for which it already holds a semaphore. This could lead to a system hang, resulting in a Denial of Service (DoS).

Statement

This flaw affects systems using SCSI target (LIO) with configfs. The recursive lock occurs when writing to the dbroot configfs attribute with the path pointing to the same configfs file. This causes the frag_sem semaphore to be acquired twice, leading to a deadlock. Exploiting this requires access to the target configfs interface, typically requiring root privileges.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score5.55.5N/A
Attack VectorLocalLocalN/A
Attack ComplexityLowLowN/A
Privileges RequiredLowLowN/A
User InteractionNoneNoneN/A
ScopeUnchangedUnchangedN/A
ConfidentialityNoneNoneN/A
Integrity ImpactNoneNoneN/A
Availability ImpactHighHighN/A

Vector

Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Understanding the Weakness (CWE)

CWE-764

Availability,Integrity

Technical Impact: DoS: Resource Consumption (CPU); DoS: Crash, Exit, or Restart; Unexpected State

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