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

CVE-2025-40024 is fixed in 42 products on 1 platform, first by DEBIAN-CVE-2025-40024, released October 24, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-40024
- Priority: High
- CVSS: 7.8 (Moderate)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 24, 2025
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-40024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool6.12 amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | dtb-aarch64 opensuse-leap 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | dtb-aarch64 opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-64kb opensuse-leap 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-64kb opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-64kb sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 |
| Linux | kernel-azure sles 15.7 | 6.4.0-150700.20.24.1 | [SUSE-SU-2026:0281-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0281-1.md) | Jan 23, 2026 |
| Linux | kernel-debug opensuse-leap 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-default opensuse-leap 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-default opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-default sles 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-default sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-default sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 |
| Linux | kernel-default-base opensuse-leap 15.6 | 6.4.0-150600.23.84.1.150600.12.38.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-default-base opensuse-leap 16.0 | 6.12.0-160000.8.1.160000.2.5 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.84.1.150600.12.38.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.28.1.150700.17.19.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-default-base sles 16.0 | 6.12.0-160000.8.1.160000.2.5 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 |
| Linux | kernel-docs opensuse-leap 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-docs opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-docs sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 |
| Linux | kernel-kvmsmall opensuse-leap 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-kvmsmall opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-kvmsmall sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 |
| Linux | kernel-livepatch-6.12.53-69.119 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel-livepatch-SLE15-SP6_Update_19 sles 15.6 | 1-150600.13.3.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-livepatch-SLE15-SP7-RT_Update_8 sles 15.7 | 1-150700.1.3.1 | [SUSE-SU-2026:0278-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0278-1.md) | Jan 23, 2026 |
| Linux | kernel-livepatch-SLE15-SP7_Update_8 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-obs-build opensuse-leap 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-obs-build opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-obs-qa opensuse-leap 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-obs-qa opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-obs-qa sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 |
| Linux | kernel-rt opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-source opensuse-leap 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-source opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-source sles 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-source sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-source sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 |
| Linux | kernel-source-azure sles 15.7 | 6.4.0-150700.20.24.1 | [SUSE-SU-2026:0281-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0281-1.md) | Jan 23, 2026 |
| Linux | kernel-syms opensuse-leap 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-syms opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-syms sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 |
| Linux | kernel-syms-azure sles 15.7 | 6.4.0-150700.20.24.1 | [SUSE-SU-2026:0281-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0281-1.md) | Jan 23, 2026 |
| Linux | kernel-zfcpdump opensuse-leap 15.6 | 6.4.0-150600.23.84.1 | [SUSE-SU-2026:0293-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0293-1.md) | Jan 26, 2026 |
| Linux | kernel-zfcpdump opensuse-leap 16.0 | 6.12.0-160000.8.1 | [OPENSUSE-SU-2025:20172-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20172-1.md) | Dec 19, 2025 |
| Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-zfcpdump sles 16.0 | 6.12.0-160000.8.1 | [SUSE-SU-2026:20015-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20015-1.md) | Dec 19, 2025 |
| Linux | kernel6.12 amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-devel amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-headers amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-libbpf amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-libbpf-debuginfo amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-libbpf-devel amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-libbpf-static amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-tools amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.12.57-1 | [DEBIAN-CVE-2025-40024](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40024.md) | Oct 24, 2025 |
| Linux | linux Debian 14 | 6.16.10-1 | [DEBIAN-CVE-2025-40024](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40024.md) | Oct 24, 2025 |
| Linux | perf6.12 amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | python3-perf6.12 amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |
| Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.53-69.119.amzn2023 | [ALAS2023-2025-1254](https://patchblox.com/security/data/fix/linux/alas2023-2025-1254.md) | Oct 27, 2025 |

---

Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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