# CVE-2026-23228: smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()

CVE-2026-23228 is fixed in 58 products on 1 platform, first by DEBIAN-CVE-2026-23228, released February 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-23228
- Priority: Routine
- CVSS: 6.5 (Moderate)
- EPSS: 0.0014
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 18, 2026
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23228

## Description

In the Linux kernel, the following vulnerability has been resolved:  smb: server: fix leak of active_num_conn in ksmbd_tcp_new_connection()  On kthread_run() failure in ksmbd_tcp_new_connection(), the transport is freed via free_transport(), which does not decrement active_num_conn, leaking this counter.  Replace free_transport() with ksmbd_tcp_disconnect().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | bpftool-debuginfo amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-debuginfo amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-devel amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-headers amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-libbpf amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-libbpf-debuginfo amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-libbpf-devel amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-libbpf-static amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-livepatch-6.1.164-196.303 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-modules-extra amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-modules-extra-common amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-tools amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-tools-debuginfo amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-tools-devel amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | kernel-uek ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-core ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-core ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-core ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-core ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-devel ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-devel ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-core ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-core ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-deprecated ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-deprecated ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-desktop ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-desktop ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-extra ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-extra ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-extra-netfilter ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-extra-netfilter ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-usb ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-usb ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-wireless ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-debug-modules-wireless ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-devel ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-devel ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-doc ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-doc ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-core ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-core ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-deprecated ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-deprecated ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-desktop ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-desktop ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-extra ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-extra ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-extra-netfilter ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-extra-netfilter ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-usb ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-usb ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-wireless ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-modules-wireless ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-tools ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek-tools ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-core ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-core ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-devel ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-devel ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-core ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-core ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-deprecated ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-deprecated ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-desktop ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-desktop ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-extra ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-extra ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-extra-netfilter ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-extra-netfilter ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-usb ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-usb ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-wireless ol 10 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | kernel-uek64k-modules-wireless ol 9 | 0:6.12.0-200.74.27.el9uek | [ELSA-2026-50160](https://patchblox.com/security/data/fix/linux/elsa-2026-50160.md) | Mar 20, 2026 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.164-1 | [DEBIAN-CVE-2026-23228](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23228.md) | Feb 18, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.73-1 | [DEBIAN-CVE-2026-23228](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23228.md) | Feb 18, 2026 |
| Linux | linux Debian 14 | 6.18.12-1 | [DEBIAN-CVE-2026-23228](https://patchblox.com/security/data/fix/linux/debian-cve-2026-23228.md) | Feb 18, 2026 |
| Linux | perf amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | perf-debuginfo amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | python3-perf amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |
| Linux | python3-perf-debuginfo amzn 2023 | 1:6.1.164-196.303.amzn2023 | [ALAS2023-2026-1491](https://patchblox.com/security/data/fix/linux/alas2023-2026-1491.md) | Mar 16, 2026 |

---

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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