Linux Kernel up to 6.19.10 tracing cpus_write_lock deadlock

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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 6.19.10. Affected by this issue is the function cpus_write_lock of the component tracing. The manipulation results in deadlock. This vulnerability is known as CVE-2026-31480. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.19.10. Affected is the function cpus_write_lock of the component tracing. The manipulation with an unknown input leads to a deadlock vulnerability. CWE is classifying the issue as CWE-833. The product contains multiple threads or executable segments that are waiting for each other to release a necessary lock, resulting in deadlock. This is going to have an impact on availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: tracing: Fix potential deadlock in cpu hotplug with osnoise The following sequence may leads deadlock in cpu hotplug: task1 task2 task3 ----- ----- ----- mutex_lock(&interface_lock) [CPU GOING OFFLINE] cpus_write_lock(); osnoise_cpu_die(); kthread_stop(task3); wait_for_completion(); osnoise_sleep(); mutex_lock(&interface_lock); cpus_read_lock(); [DEAD LOCK] Fix by swap the order of cpus_read_lock() and mutex_lock(&interface_lock).

The advisory is shared for download at git.kernel.org. This vulnerability is traded as CVE-2026-31480 since 03/09/2026. The exploitability is told to be difficult. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 313522 (Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2026-1681)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.15.203, 6.1.168, 6.6.131, 6.12.80, 6.18.21 or 6.19.11 eliminates this vulnerability. Applying the patch cf929c21eeed5bd39873fb14bfdfff963fa6f1da/7aa095ce7d224308cb6979956f0de8607df93d4f/ef41a85a55022e27cdaebf22a6676910b66f65aa/03474a01c199de17a8e2d39b51df6beb9c76e831/f278b8ebf7eba2a1699cfc7bf30dd3ef898d60d7/7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f/1f9885732248d22f788e4992c739a98c88ab8a55 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (313522) and CERT Bund (WID-SEC-2026-1252). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deadlock
CWE: CWE-833 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 313522
Nessus Name: Amazon Linux 2023 : bpftool, kernel, kernel-devel (ALAS2023-2026-1681)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.15.203/6.1.168/6.6.131/6.12.80/6.18.21/6.19.11
Patch: cf929c21eeed5bd39873fb14bfdfff963fa6f1da/7aa095ce7d224308cb6979956f0de8607df93d4f/ef41a85a55022e27cdaebf22a6676910b66f65aa/03474a01c199de17a8e2d39b51df6beb9c76e831/f278b8ebf7eba2a1699cfc7bf30dd3ef898d60d7/7a41d4633cd2c15eb5ed31e8f3b16910e50a8c9f/1f9885732248d22f788e4992c739a98c88ab8a55

Timelineinfo

03/09/2026 CVE reserved
04/22/2026 +43 days Advisory disclosed
04/22/2026 +0 days VulDB entry created
06/17/2026 +56 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31480 (🔒)
GCVE (CVE): GCVE-0-2026-31480
GCVE (VulDB): GCVE-100-358920
CERT Bund: WID-SEC-2026-1252 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 04/22/2026 17:19
Updated: 06/17/2026 23:37
Changes: 04/22/2026 17:19 (59), 05/10/2026 10:48 (2), 06/17/2026 23:37 (7)
Complete: 🔍
Cache ID: 216::103

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