# CVE-2025-40364: linux: In the Linux kernel, the following vulnerability has been resolved:  io_uring: fix io_req_prep_async with provided bu...

CVE-2025-40364 is fixed in 34 products on 1 platform, first by ALAS2023-2025-876, released February 26, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-40364
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  io_uring: fix io_req_prep_async with provided buffers  io_req_prep_async() can import provided buffers, commit the ring state by giving up on that before, it'll be reimported later if needed.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | bpftool-debuginfo amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | dtb-aarch64 opensuse-leap 16.0 | 6.12.0-160000.7.1 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-64kb opensuse-leap 16.0 | 6.12.0-160000.7.1 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel-64kb sles 16.0 | 6.12.0-160000.7.1 | [SUSE-SU-2025:21147-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-21147-1.md) | Nov 26, 2025 |
| Linux | kernel-debuginfo amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-default opensuse-leap 16.0 | 6.12.0-160000.7.1 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel-default sles 16.0 | 6.12.0-160000.7.1 | [SUSE-SU-2025:21147-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-21147-1.md) | Nov 26, 2025 |
| Linux | kernel-default-base opensuse-leap 16.0 | 6.12.0-160000.6.1.160000.2.4 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel-default-base sles 16.0 | 6.12.0-160000.6.1.160000.2.4 | [SUSE-SU-2025:21147-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-21147-1.md) | Nov 26, 2025 |
| Linux | kernel-devel amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-docs opensuse-leap 16.0 | 6.12.0-160000.7.1 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel-docs sles 16.0 | 6.12.0-160000.7.1 | [SUSE-SU-2025:21147-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-21147-1.md) | Nov 26, 2025 |
| Linux | kernel-headers amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-kvmsmall opensuse-leap 16.0 | 6.12.0-160000.7.1 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel-kvmsmall sles 16.0 | 6.12.0-160000.7.1 | [SUSE-SU-2025:21147-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-21147-1.md) | Nov 26, 2025 |
| Linux | kernel-libbpf amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-libbpf-devel amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-libbpf-static amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-livepatch-6.1.129-138.220 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-modules-extra amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-modules-extra-common amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-obs-build opensuse-leap 16.0 | 6.12.0-160000.7.1 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel-obs-qa opensuse-leap 16.0 | 6.12.0-160000.7.1 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel-obs-qa sles 16.0 | 6.12.0-160000.7.1 | [SUSE-SU-2025:21147-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-21147-1.md) | Nov 26, 2025 |
| Linux | kernel-rt opensuse-leap 16.0 | 6.12.0-160000.7.1 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel-source opensuse-leap 16.0 | 6.12.0-160000.7.1 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel-source sles 16.0 | 6.12.0-160000.7.1 | [SUSE-SU-2025:21147-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-21147-1.md) | Nov 26, 2025 |
| Linux | kernel-syms opensuse-leap 16.0 | 6.12.0-160000.7.1 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel-syms sles 16.0 | 6.12.0-160000.7.1 | [SUSE-SU-2025:21147-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-21147-1.md) | Nov 26, 2025 |
| Linux | kernel-tools amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-tools-debuginfo amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-tools-devel amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | kernel-zfcpdump opensuse-leap 16.0 | 6.12.0-160000.7.1 | [OPENSUSE-SU-2025:20091-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2025-20091-1.md) | Nov 26, 2025 |
| Linux | kernel-zfcpdump sles 16.0 | 6.12.0-160000.7.1 | [SUSE-SU-2025:21147-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-21147-1.md) | Nov 26, 2025 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.129-1 | [DEBIAN-CVE-2025-40364](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40364.md) | Apr 18, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.12.15-1 | [DEBIAN-CVE-2025-40364](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40364.md) | Apr 18, 2025 |
| Linux | linux Debian 14 | 6.12.15-1 | [DEBIAN-CVE-2025-40364](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40364.md) | Apr 18, 2025 |
| Linux | perf amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | perf-debuginfo amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | python3-perf amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 2025 |
| Linux | python3-perf-debuginfo amzn 2023 | 6.1.129-138.220.amzn2023 | [ALAS2023-2025-876](https://patchblox.com/security/data/fix/linux/alas2023-2025-876.md) | Feb 26, 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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