CVE-2026-80622High· 7.8▾ Twilight

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 cond…

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score43/ 100 · Moderate

impact 42.9 · likelihood 0 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Aug 28, 2026

Updated

Oct 16, 2026

CVSS

7.8

Vendor

Linux

Product

Linux

CWE

—

Depth score

43 · Moderate

EPSS

0.17% · p6

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-10-16

Exploitation: none
Automatable: no
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Aug 29.

0.1% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

4 events · 49 days

Aug 28, 2026Published
Disclosed via NVD
Aug 29, 2026EPSS first tracked
0.1%
Sep 25, 2026EPSS peak
0.1% → 0.2%
Oct 16, 2026Record revised
Last analysed / modified upstream

Linux #nvd #cve.org

Affected

Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 09d8d2a46a9ec9ff728f3159a174a2ab25dd0f0a
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 96902299a22d126ef5eb3f45cd5d8ceea9e6a735
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 166dd1d5265e067459e674c11688919901813ec2
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 764723bd67a6c8f53a8d8309211fb039e2ebcf49
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < c3f0cd76561ae611c2d247ee96dfd559e4197cb7
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 3d5e4cc0d9dce79b0429da3134ac7b072ab9009f
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 42223445607a9a5df3cb1c4729abfe3a5085e7ce
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < bbf003b7794d6ad6f939fdd29f1f1bde8ac554c1
Linux 2.6.15

Full technical detail▾

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org

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CVE-2026-80622High· 7.8▾ Twilight

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 cond…

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score43/ 100 · Moderate

impact 42.9 · likelihood 0 · exploitation 0

⚡ Agent-ready:Raw markdown ↗JSON ↗

Proof of concept

Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.

…

Published

Aug 28, 2026

Updated

Oct 16, 2026

CVSS

7.8

Vendor

Linux

Product

Linux

CWE

—

Depth score

43 · Moderate

EPSS

0.17% · p6

Platforms

—

Source

NVD

Vector

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

CISA SSVC

decided 2026-10-16

Exploitation: none
Automatable: no
Technical impact: total

Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.

EPSS history

Exploit-prediction probability, daily snapshots since Aug 29.

0.1% → 0.2%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

4 events · 49 days

Aug 28, 2026Published
Disclosed via NVD
Aug 29, 2026EPSS first tracked
0.1%
Sep 25, 2026EPSS peak
0.1% → 0.2%
Oct 16, 2026Record revised
Last analysed / modified upstream

Linux #nvd #cve.org

Affected

Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 09d8d2a46a9ec9ff728f3159a174a2ab25dd0f0a
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 96902299a22d126ef5eb3f45cd5d8ceea9e6a735
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 166dd1d5265e067459e674c11688919901813ec2
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 764723bd67a6c8f53a8d8309211fb039e2ebcf49
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < c3f0cd76561ae611c2d247ee96dfd559e4197cb7
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 3d5e4cc0d9dce79b0429da3134ac7b072ab9009f
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < 42223445607a9a5df3cb1c4729abfe3a5085e7ce
Linux >= 1a80ba88273097933f93b1f40537337416798c70 < bbf003b7794d6ad6f939fdd29f1f1bde8ac554c1
Linux 2.6.15

Full technical detail▾

Overview

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.

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org