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Vulnerability record · CVE-2009-3621 · published 22 October 2009

CVE-2009-3621: Linux kernel uncontrolled resource consumption vulnerability

Linux · Linux Kernel

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.

5.5 CVSS 3.1 Medium EPSS 0.99% · top 39.0% CWE-400 · Uncontrolled resource consumption
5.5CVSS 3.1 base score, v2 4.9
0.99%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
52References, 8 tagged exploit
16 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

8 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git%3Ba=commit%3Bh=77238f2b942b38ab4e7f3aced44084493e4a8675
http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00002.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00005.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00007.html Mailing ListThird Party Advisory
http://lists.vmware.com/pipermail/security-announce/2010/000082.html Mailing ListThird Party Advisory
http://lkml.org/lkml/2009/10/19/50 Mailing ListThird Party Advisory
http://patchwork.kernel.org/patch/54678/ ExploitMailing ListThird Party Advisory
http://secunia.com/advisories/37086 Broken Link
http://secunia.com/advisories/37909 Broken Link
http://secunia.com/advisories/38017 Broken Link
http://secunia.com/advisories/38794 Broken Link
http://secunia.com/advisories/38834 Broken Link
http://www.mandriva.com/security/advisories?name=MDVSA-2009:329 Broken Link
http://www.openwall.com/lists/oss-security/2009/10/19/2 ExploitMailing ListPatchThird Party Advisory
http://www.openwall.com/lists/oss-security/2009/10/19/4 ExploitMailing ListPatchThird Party Advisory
http://www.redhat.com/support/errata/RHSA-2009-1670.html Broken Link
http://www.redhat.com/support/errata/RHSA-2009-1671.html Broken Link
http://www.ubuntu.com/usn/usn-864-1 Third Party Advisory
http://www.vupen.com/english/advisories/2010/0528 Broken Link
https://bugzilla.redhat.com/show_bug.cgi?id=529626 ExploitIssue TrackingThird Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6895 Third Party Advisory
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9921 Third Party Advisory
https://rhn.redhat.com/errata/RHSA-2009-1540.html Third Party Advisory
https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00190.html Mailing ListThird Party Advisory
http://git.kernel.org/?p=linux/kernel/git/davem/net-2.6.git%3Ba=commit%3Bh=77238f2b942b38ab4e7f3aced44084493e4a8675
http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00002.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00005.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00007.html Mailing ListThird Party Advisory
http://lists.vmware.com/pipermail/security-announce/2010/000082.html Mailing ListThird Party Advisory
http://lkml.org/lkml/2009/10/19/50 Mailing ListThird Party Advisory
http://patchwork.kernel.org/patch/54678/ ExploitMailing ListThird Party Advisory
http://secunia.com/advisories/37086 Broken Link
http://secunia.com/advisories/37909 Broken Link
http://secunia.com/advisories/38017 Broken Link
http://secunia.com/advisories/38794 Broken Link
http://secunia.com/advisories/38834 Broken Link

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Source: NIST National Vulnerability Database (record CVE-2009-3621), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.