CVE-2026-80622

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-80622

Key Details

CVE	CVE-2026-80622
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

char: tlclk: fix use-after-free in tlclk_cleanup()

This patch improves the module cleanup process in the tlclk driver to

prevent potential use-after-free and race conditions.

Currently, the file_operations structure does not specify the .owner

field, which could allow the module to be unloaded while user-space

processes are still interacting with the device. Additionally, the

tlclk_cleanup() function frees the alarm_events memory before ensuring

that blocked processes in the waitqueue are fully awakened and that the

switchover_timer has completed.

To address these cases, this patch:

- Sets '.owner = THIS_MODULE' in tlclk_fops to safely defer module

unloading while the device is in use.

- Updates tlclk_cleanup() to explicitly wake up all blocked readers

(wake_up_all), properly release hardware I/O regions, and safely

delete the timer (timer_delete_sync) prior to freeing memory. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-80622
CVE	https://www.cve.org/CVERecord?id=CVE-2026-80622

Source

Reference

NVD

CVE