CVE-2006-2374
The Server Message Block (SMB) driver (MRXSMB.SYS) in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 and earlier allows…
- 5.5MediumCVSS base score
- 1.7%Exploitation in 30 daysEPSS · top 22% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 2Public exploitsMetasploit, Nuclei and Exploit-DB
Description
The Server Message Block (SMB) driver (MRXSMB.SYS) in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 and earlier allows local users to cause a denial of service (hang) by calling the MrxSmbCscIoctlCloseForCopyChunk with the file handle of the shadow device, which results in a deadlock, aka the "SMB Invalid Handle Vulnerability."
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list 2 Exploit-DB entries for it.
Show the exploits2
Exploit-DB2 entries
- Microsoft Windows XP/2000 - 'Mrxsmb.sys' Local Privilege Escalation (MS06-030) (Exploit-DB entry) (opens in a new tab)
EDB-ID 1911local, windowspublished 14 Jun 2006Verified
- Microsoft SMB Driver - Local Denial of Service (Exploit-DB entry) (opens in a new tab)
EDB-ID 28001dos, windowspublished 13 Jun 2006Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By microsoft
- 29 days later
· 29 days later
Published
- 18 years later
· 18 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.7% · top 22% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
n/a
- affected n/a
References
14
- 1016288 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- oval:org.mitre.oval:def:1827 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- oval:org.mitre.oval:def:1841 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- oval:org.mitre.oval:def:2030 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- win-smb-dos(26830) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- ADV-2006-2327 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- oval:org.mitre.oval:def:1979 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 20060613 Windows MRXSMB.SYS MrxSmbCscIoctlCloseForCopyChunk DoS (opens in a new tab)third-party-advisoryx_refsource_IDEFENSEx_transferred
- oval:org.mitre.oval:def:1850 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- MS06-030 (opens in a new tab)vendor-advisoryx_refsource_MSx_transferred
- oval:org.mitre.oval:def:2060 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- 20635 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 26439 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 18357 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2006-2375 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2006-2374)Record last updated .