CVE-2009-3621

Public Exploit

Description

net/unix/af_unix.c in the Linux kernel 2.6.31.4 and earlier allows local users to cause a denial of service (system hang) by creating an abstract-namespace AF_UNIX listening socket, performing a shutdown operation on this socket, and then performing a series of connect operations to this socket.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.04%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory mandriva.com Vendor Advisory opensuse.org Vendor Advisory redhat.com Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory redhat.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.openwall.com/lists/oss-security/2009/10/19/2 mailing list patch exploit third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=529626 issue tracking exploit third party advisory
http://lkml.org/lkml/2009/10/19/50 third party advisory mailing list
http://www.redhat.com/support/errata/RHSA-2009-1671.html vendor advisory broken link
http://www.openwall.com/lists/oss-security/2009/10/19/4 mailing list patch exploit third party advisory
https://rhn.redhat.com/errata/RHSA-2009-1540.html third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00002.html mailing list third party advisory vendor advisory
http://www.ubuntu.com/usn/usn-864-1 third party advisory vendor advisory
http://secunia.com/advisories/38794 third party advisory broken link
http://lists.vmware.com/pipermail/security-announce/2010/000082.html third party advisory mailing list
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html mailing list third party advisory vendor advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2009:329 vendor advisory broken link
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html mailing list third party advisory vendor advisory
http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git%3Ba=commit%3Bh=77238f2b942b38ab4e7f3aced44084493e4a8675
http://secunia.com/advisories/37909 third party advisory broken link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9921 vdb entry third party advisory signature
http://patchwork.kernel.org/patch/54678/ mailing list exploit third party advisory
http://www.redhat.com/support/errata/RHSA-2009-1670.html vendor advisory broken link
http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00005.html mailing list third party advisory vendor advisory
http://secunia.com/advisories/38834 third party advisory broken link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6895 vdb entry third party advisory signature
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00007.html mailing list third party advisory vendor advisory
http://secunia.com/advisories/37086 third party advisory broken link
http://secunia.com/advisories/38017 third party advisory broken link
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00190.html mailing list third party advisory vendor advisory
http://www.vupen.com/english/advisories/2010/0528 vdb entry broken link

Frequently Asked Questions

What is the severity of CVE-2009-3621?
CVE-2009-3621 has been scored as a medium severity vulnerability.
How to fix CVE-2009-3621?
To fix CVE-2009-3621, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2009-3621 being actively exploited in the wild?
It is possible that CVE-2009-3621 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.