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Vulnerability DatabaseCVE-2025-21944
CVE-2025-21944:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2025-21944 is a vulnerability discovered in the Linux kernel's ksmbd component, specifically related to a bug in the smb2_lock functionality. The vulnerability was disclosed on April 1, 2025, affecting various Linux distributions and their kernel packages (NVD Database).
Technical details
The vulnerability occurs in the ksmbd component when handling lock counts greater than 1, where flags could retain old values instead of being properly checked with flags of smblock. This implementation flaw results in a bug-on trap from locksfree_lock in the error handling routine (NVD Database).
Impact
The vulnerability affects multiple Linux distributions including Ubuntu and Debian, with various kernel packages marked as vulnerable. Ubuntu has classified this as a medium priority issue, while Debian included it in a security update addressing multiple vulnerabilities (Ubuntu Security, Debian Security).
Mitigation and workarounds
For Debian's stable distribution (bookworm), this vulnerability has been fixed in version 6.1.133-1. Users are recommended to upgrade their Linux packages to the latest versions (Debian Security).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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