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

vhost: Take a reference on the task in struct vhost_task.

vhost_task_create() creates a task and keeps a reference to its
task_struct. That task may exit early via a signal and its task_struct
will be released.
A pending vhost_task_wake() will then attempt to wake the task and
access a task_struct which is no longer there.

Acquire a reference on the task_struct while creating the thread and
release the reference while the struct vhost_task itself is removed.
If the task exits early due to a signal, then the vhost_task_wake() will
still access a valid task_struct. The wake is safe and will be skipped
in this case.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00025.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Linux Subscribe
Linux Kernel Subscribe

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No data.

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/7ce635b3d3aba43296b62b5a2d97c008bc51cbd2 cve-icon cve-icon
https://git.kernel.org/stable/c/82a1463c968b1a6ae598a4f2fcef17b71bb7d3a0 cve-icon cve-icon
https://git.kernel.org/stable/c/afe16653e05db07d658b55245c7a2e0603f136c0 cve-icon cve-icon
https://git.kernel.org/stable/c/d2be773a92874a070215b51b730cb2b1eaa8fae2 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2025102404-CVE-2025-40024-8739@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2025-40024 cve-icon
https://www.cve.org/CVERecord?id=CVE-2025-40024 cve-icon
History

Mon, 27 Oct 2025 22:30:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
Vendors & Products Linux
Linux linux Kernel

Sat, 25 Oct 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Fri, 24 Oct 2025 12:45:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: vhost: Take a reference on the task in struct vhost_task. vhost_task_create() creates a task and keeps a reference to its task_struct. That task may exit early via a signal and its task_struct will be released. A pending vhost_task_wake() will then attempt to wake the task and access a task_struct which is no longer there. Acquire a reference on the task_struct while creating the thread and release the reference while the struct vhost_task itself is removed. If the task exits early due to a signal, then the vhost_task_wake() will still access a valid task_struct. The wake is safe and will be skipped in this case.
Title vhost: Take a reference on the task in struct vhost_task.
References

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-10-24T12:24:59.199Z

Reserved: 2025-04-16T07:20:57.152Z

Link: CVE-2025-40024

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Awaiting Analysis

Published: 2025-10-24T13:15:47.647

Modified: 2025-10-27T13:20:15.637

Link: CVE-2025-40024

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-10-24T00:00:00Z

Links: CVE-2025-40024 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-10-27T22:12:51Z

Weaknesses

No weakness.