# CVE-2025-38561: ksmbd: fix Preauh_HashValue race condition

CVE-2025-38561 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-38561, released August 19, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-38561
- Priority: High
- CVSS: 9.8 (medium)
- EPSS: 0.0045
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 19, 2025
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-38561

## Description

In the Linux kernel, the following vulnerability has been resolved:  ksmbd: fix Preauh_HashValue race condition  If client send multiple session setup requests to ksmbd, Preauh_HashValue race condition could happen. There is no need to free sess->Preauh_HashValue at session setup phase. It can be freed together with session at connection termination phase.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.148-1 | [DEBIAN-CVE-2025-38561](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38561.md) | Aug 19, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.12.43-1 | [DEBIAN-CVE-2025-38561](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38561.md) | Aug 19, 2025 |
| Linux | linux Debian 14 | 6.16.3-1 | [DEBIAN-CVE-2025-38561](https://patchblox.com/security/data/fix/linux/debian-cve-2025-38561.md) | Aug 19, 2025 |

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Data as of 2026-11-08T19:12:23Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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