# CVE-2025-40216: linux: In the Linux kernel, the following vulnerability has been resolved:  io_uring/rsrc: don't rely on user vaddr alignmen...

CVE-2025-40216 is fixed in 38 products on 1 platform, first by ALAS2023-2025-1130, released July 29, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-40216
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 29, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  io_uring/rsrc: don't rely on user vaddr alignment  There is no guaranteed alignment for user pointers, however the calculation of an offset of the first page into a folio after coalescing uses some weird bit mask logic, get rid of it.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool6.12 amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | dtb-aarch64 opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-64kb opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-64kb sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-azure opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-azure sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-azure sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-default opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-default sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-default sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23237-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23237-1.md) | Aug 11, 2026 |
| Linux | kernel-default-base opensuse-leap 16.0 | 6.12.0-160000.37.1.160000.2.19 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.66.1.150700.17.39.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-default-base sles 16.0 | 6.12.0-160000.37.1.160000.2.19 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-docs opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.66.2 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-docs sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-kvmsmall opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-kvmsmall sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-livepatch-6.12.37-61.105 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel-livepatch-SLE15-SP7-RT_Update_17 sles 15.7 | 1-150700.1.3.1 | [SUSE-SU-2026:2799-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2799-1.md) | Jul 8, 2026 |
| Linux | kernel-livepatch-SLE15-SP7_Update_18 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-obs-build opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-obs-qa opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-obs-qa sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-rt opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-source opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-source sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-source sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-syms opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-syms sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-zfcpdump opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-zfcpdump sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel6.12 amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-devel amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-headers amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-libbpf amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-libbpf-debuginfo amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-libbpf-devel amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-libbpf-static amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-tools amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.12.37-1 | [DEBIAN-CVE-2025-40216](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40216.md) | Dec 4, 2025 |
| Linux | linux Debian 14 | 6.12.37-1 | [DEBIAN-CVE-2025-40216](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40216.md) | Dec 4, 2025 |
| Linux | perf6.12 amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | python3-perf6.12 amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |
| Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.37-61.105.amzn2023 | [ALAS2023-2025-1130](https://patchblox.com/security/data/fix/linux/alas2023-2025-1130.md) | Jul 29, 2025 |

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