#VU124195 Exposure of resource to wrong sphere in Linux kernel - CVE-2026-23253
Published: March 20, 2026
Vulnerability identifier: #VU124195
Vulnerability risk: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-23253
CWE-ID: CWE-668
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper initialization in the dvb_ringbuffer component when reopening a DVR device. A local user can open a specially crafted DVR device to cause a denial of service.
The issue arises because dvb_dvr_open() reinitializes the shared waitqueue head, which can orphan existing waitqueue entries from io_uring poll or epoll, leading to stale pointers and potential system instability.
Remediation
Install security update from vendor's repository.