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CVE-2009-2906

18
FAUCET Score

CVE-2009-2906 describes a denial-of-service vulnerability in smbd, affecting Samba versions 3.0.x, 3.2.x, 3.3.x, and 3.4.x before specific patch levels, as well as Canonical Ubuntu Linux distributions utilizing these vulnerable Samba versions. An authenticated remote attacker can trigger an infinite loop by sending a specially crafted oplock break notification reply packet. This vulnerability has a CVSS score of 4.0 (AV:N/AC:L/Au:S/C:N/I:N/A:P), indicating a low severity with potential for partial availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.0.37CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
>= 3.2.0, < 3.2.15CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
>= 3.3.0, < 3.3.8CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
3.4.0CPE matchmatch criteria
cpe:2.3:a:samba:samba:3.4.0:*:*:*:*:*:*:*
3.4.1CPE matchmatch criteria
cpe:2.3:a:samba:samba:3.4.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.0MEDIUM

AV:N/AC:L/Au:S/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
SINGLE
Exploitability Score
8.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.21%
Probability of exploitation in next 30 days
EPSS Percentile
89.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0421 is in the 97th percentile among its peer group of 21,974 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 3Fixed in: samba-0:3.0.9-1.3E.16
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: samba-0:3.0.33-0.18.el4_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: samba-0:3.0.33-3.15.el5_4
View patch
redhatpatch availablevia redhat_api
Product: Supplementary for Red Hat Enterprise Linux 5Fixed in: samba3x-0:3.3.8-0.46.el5
View patch
ubuntupatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2009-2906Moderate

samba: infinite loop flaw in smbd on unexpected oplock break notification reply

Oct 1, 2009

References

lists.apple.com / archives/security-announce/2010//Mar/msg00001.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2009-10/msg00004.html
Mailing ListThird Party Advisory
news.samba.org / releases/3.0.37
Vendor Advisory
news.samba.org / releases/3.2.15
Vendor Advisory
news.samba.org / releases/3.3.8
Vendor Advisory
news.samba.org / releases/3.4.2
Vendor Advisory
osvdb.org / 58519
Broken Link
samba.org / samba/security/CVE-2009-2906.html
Vendor Advisory
secunia.com / advisories/36893
Vendor Advisory
secunia.com / advisories/36918
Vendor Advisory
secunia.com / advisories/36937
Vendor Advisory
secunia.com / advisories/36953
Vendor Advisory
secunia.com / advisories/37428
Third Party Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/53575
Third Party AdvisoryVDB Entry
slackware.com / security/viewer.php
PatchThird Party Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7090
Third Party Advisory
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9944
Third Party Advisory
sunsolve.sun.com / search/document.do
Broken Link
support.apple.com / kb/HT4077
Third Party Advisory
redhat.com / archives/fedora-package-announce/2009-October/msg00095.html
PatchThird Party Advisory
redhat.com / archives/fedora-package-announce/2009-October/msg00098.html
PatchThird Party Advisory
wiki.rpath.com / Advisories:rPSA-2009-0145
Third Party Advisory
securityfocus.com / archive/1/507856/100/0/threaded
Third Party AdvisoryVDB Entry
securityfocus.com / bid/36573
PatchThird Party AdvisoryVDB Entry
securitytracker.com / id
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-839-1
PatchThird Party Advisory
vupen.com / english/advisories/2009/2810
PatchThird Party Advisory