Microsoft · ksmbd: prevent connection release during oplock break notification
Affects MicrosoftSource GCVE Database
Not known to be exploited.
Data as of 29 Oct 2026, 23:39 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
Exploitation evidence
Disclosed: evidence found.
CVE published 2 Apr 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Microsoft Security Response Center Microsoft | Affected
| Fixed in– |
Description
This vulnerability, identified as CVE-2025-21955, relates to the ksmbd component and involves preventing connection release during an oplock break notification. The advisory does not provide detailed technical information or impact specifics. The affected version is exactly 2.0. No public exploit code or known exploitation in the wild is reported. No CVSS score is available, and no patch or remediation details are provided.