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CVE-2025-40024— vhost: Take a reference on the task in struct vhost_task.

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未在struct vhost_task中获取任务引用，可能导致访问已释放的任务结构。

CVSS 7.8 · High EPSS 0.15% · P4

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux f9010dbdce911ee1f1af1398a24b1f9f992e0080< 82a1463c968b1a6ae598a4f2fcef17b71bb7d3a0 affected
f9010dbdce911ee1f1af1398a24b1f9f992e0080< d2be773a92874a070215b51b730cb2b1eaa8fae2 affected
f9010dbdce911ee1f1af1398a24b1f9f992e0080< 7ce635b3d3aba43296b62b5a2d97c008bc51cbd2 affected
f9010dbdce911ee1f1af1398a24b1f9f992e0080< afe16653e05db07d658b55245c7a2e0603f136c0 affected
6.4 affected
< 6.4 unaffected
6.6.109≤ 6.6.* unaffected
6.12.50≤ 6.12.* unaffected
… +2 more rows
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I. Basic Information for CVE-2025-40024

Vulnerability Information
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Vulnerability Title
vhost: Take a reference on the task in struct vhost_task.
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于未在struct vhost_task中获取任务引用，可能导致访问已释放的任务结构。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux f9010dbdce911ee1f1af1398a24b1f9f992e0080 ~ 82a1463c968b1a6ae598a4f2fcef17b71bb7d3a0 -
Linux Linux 6.4 -

II. Public POCs for CVE-2025-40024

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III. Intelligence Information for CVE-2025-40024

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Same Patch Batch · Linux · 2025-10-24 · 8 CVEs total

CVE-2023-53733 7.8 HIGH net: sched: cls_u32: Undo tcf_bind_filter if u32_replace_hw_knode
CVE-2025-40018 7.8 HIGH ipvs: Defer ip_vs_ftp unregister during netns cleanup
CVE-2025-40019 crypto: essiv - Check ssize for decryption and in-place encryption
CVE-2025-40020 can: peak_usb: fix shift-out-of-bounds issue
CVE-2025-40021 tracing: dynevent: Add a missing lockdown check on dynevent
CVE-2025-40022 crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
CVE-2025-40023 drm/xe/vf: Don't expose sysfs attributes not applicable for VFs

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40024

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