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Review reviewHigh

CVE-2025-40024

Linux

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(...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2025.10.24
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

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(...

Affected product and versions

Product
Linux
Affected versions
>= f9010dbdce911ee1f1af1398a24b1f9f992e0080 < 82a1463c968b1a6ae598a4f2fcef17b71bb7d3a0, >= f9010dbdce911ee1f1af1398a24b1f9f992e0080 < d2be773a92874a070215b51b730cb2b1eaa8fae2, >= f9010dbdce911ee1f1af1398a24b1f9f992e0080 < 7ce635b3d3aba43296b62b5a2d97c008bc51cbd2, >= f9010dbdce911ee1f1af1398a24b1f9f992e0080 < afe16653e05db07d658b55245c7a2e0603f136c0, >= 6.4
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available