# CVE-2025-40133: linux: In the Linux kernel, the following vulnerability has been resolved:  mptcp: Use __sk_dst_get() and dst_dev_rcu() in m...

CVE-2025-40133 is fixed in 65 products on 1 platform, first by DEBIAN-CVE-2025-40133, released November 12, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-40133
- Priority: High
- CVSS: 8.1 (high)
- EPSS: 0.0051
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Nov 12, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  mptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().  mptcp_active_enable() is called from subflow_finish_connect(), which is icsk->icsk_af_ops->sk_rx_dst_set() and it's not always under RCU.  Using sk_dst_get(sk)->dev could trigger UAF.  Let's use __sk_dst_get() and dst_dev_rcu().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool6.12 amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| 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 RHEL 10 | 6.12.0-55.58.1.el10_0 | [RHSA-2026:1727](https://patchblox.com/security/data/fix/linux/rhsa-2026-1727.md) | Dec 16, 2025 |
| Linux | kernel ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel rocky 10 | 0:6.12.0-124.35.1.el10_1 | [RLSA-2026:2282](https://patchblox.com/security/data/fix/linux/rlsa-2026-2282.md) | Feb 15, 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 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-abi-stablelists almalinux 10 | 6.12.0-124.35.1.el10_1 | [ALSA-2026:2282](https://patchblox.com/security/data/fix/linux/alsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-abi-stablelists ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-core ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-cross-headers ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-debug ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-debug-core ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-debug-devel ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-debug-devel-matched ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-debug-modules ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-debug-modules-core ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-debug-modules-extra ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-debug-uki-virt ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 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 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 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 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-devel ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-devel-matched ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-doc almalinux 10 | 6.12.0-124.35.1.el10_1 | [ALSA-2026:2282](https://patchblox.com/security/data/fix/linux/alsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-doc ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 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 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-headers ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 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-6.12.55-74.119 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel-modules ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-modules-core ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-modules-extra ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-modules-extra-matched ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 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-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 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 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 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 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-tools ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-tools-libs ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-tools-libs-devel ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-uki-virt ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | kernel-uki-virt-addons ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 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 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 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-devel amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-headers amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-libbpf amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-libbpf-debuginfo amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-libbpf-devel amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-libbpf-static amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-tools amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | libperf ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.57-1 | [DEBIAN-CVE-2025-40133](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40133.md) | Nov 12, 2025 |
| Linux | linux Debian 14 | 6.17.6-1 | [DEBIAN-CVE-2025-40133](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40133.md) | Nov 12, 2025 |
| Linux | perf ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | perf6.12 amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | python3-perf ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | python3-perf6.12 amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.55-74.119.amzn2023 | [ALAS2023-2025-1316](https://patchblox.com/security/data/fix/linux/alas2023-2025-1316.md) | Dec 8, 2025 |
| Linux | rtla ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |
| Linux | rv ol 10 | 0:6.12.0-124.35.1.el10_1 | [ELSA-2026-2282](https://patchblox.com/security/data/fix/linux/elsa-2026-2282.md) | Feb 9, 2026 |

---

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