# CVE-2025-68226: linux: In the Linux kernel, the following vulnerability has been resolved:  smb: client: fix incomplete backport in cfids_in...

CVE-2025-68226 is fixed in 23 products on 1 platform, first by DEBIAN-CVE-2025-68226, released December 16, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-68226
- Priority: High
- CVSS: 8.8 (high)
- EPSS: 0.0035
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 16, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  smb: client: fix incomplete backport in cfids_invalidation_worker()  The previous commit bdb596ceb4b7 ("smb: client: fix potential UAF in smb2_close_cached_fid()") was an incomplete backport and missed one kref_put() call in cfids_invalidation_worker() that should have been converted to close_cached_dir().

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool6.12 amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel-livepatch-6.12.63-84.121 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12 amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-devel amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-headers amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-libbpf amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-libbpf-debuginfo amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-libbpf-devel amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-libbpf-static amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-tools amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | linux Debian 14 | 6.17.10-1 | [DEBIAN-CVE-2025-68226](https://patchblox.com/security/data/fix/linux/debian-cve-2025-68226.md) | Dec 16, 2025 |
| Linux | perf6.12 amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | python3-perf6.12 amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |
| Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.63-84.121.amzn2023 | [ALAS2023-2026-1430](https://patchblox.com/security/data/fix/linux/alas2023-2026-1430.md) | Feb 16, 2026 |

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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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