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🛡️ CVE-2025-38561 — debian-linux

🔴 CVSS 9.8 — Critical ✅ No Known Exploit CWE-362 NVD
9.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

ksmbd: fix Preauh_HashValue race condition

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2025-38561 is classified as CWE-362: Race Condition. Concurrent operations share state without proper synchronisation, so timing decides whether the result is correct.

Affected software

CVE-2025-38561 is recorded against 3 packages.

  • debian-linux
  • kernel (from 6.16.0 up to 6.16.1)
  • linux-kernel (from 6.16 up to 6.16.1)

Timeline and source

Published on 19 August 2025 and last revised on 30 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
www.zerodayinitiative.com
lists.debian.org

CVE-2025-38561 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity CRITICAL
CVSS Score 9.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-362
Public Exploit ✅ No
Source NVD
Published 2025-08-19
Updated 2026-08-20
Modified 2026-07-30

Affected Packages

Software From version Fixed in
debian-linux — —
kernel 6.16.0 6.16.1
linux-kernel 6.16 6.16.1

Similar Threats

Exploit Protection

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.