CVE-2009-3621
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…
Does this matter?
A public exploit is published in Exploit-DB (verified), so the technical barrier is gone even though the severity is medium and EPSS is 1.0%. Treat it as high on anything reachable from the internet.
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
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.99% probability · 62th percentile
- Public exploits
- 1 in Exploit-DB · verified · first 10 November 2009
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- linux/linux kernel · canonical/ubuntu linux · fedoraproject/fedora · opensuse/opensuse · suse/suse linux enterprise desktop · suse/suse linux enterprise server · vmware/vma · vmware/esx
- Source
- secalert@redhat.com
EPSS 1.0% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- 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.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00005.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00007.htmlMailing List, Third Party Advisory
- http://lists.vmware.com/pipermail/security-announce/2010/000082.htmlMailing List, Third Party Advisory
- http://lkml.org/lkml/2009/10/19/50Mailing List, Third Party Advisory
- http://patchwork.kernel.org/patch/54678/Exploit, Mailing List, Third Party Advisory
- http://secunia.com/advisories/37086Broken Link
- http://secunia.com/advisories/37909Broken Link
- http://secunia.com/advisories/38017Broken Link
- http://secunia.com/advisories/38794Broken Link
- http://secunia.com/advisories/38834Broken Link
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:329Broken Link
- http://www.openwall.com/lists/oss-security/2009/10/19/2Exploit, Mailing List, Patch, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2009/10/19/4Exploit, Mailing List, Patch, Third Party Advisory
- http://www.redhat.com/support/errata/RHSA-2009-1670.htmlBroken Link
- http://www.redhat.com/support/errata/RHSA-2009-1671.htmlBroken Link
- http://www.ubuntu.com/usn/usn-864-1Third Party Advisory
- http://www.vupen.com/english/advisories/2010/0528Broken Link
- https://bugzilla.redhat.com/show_bug.cgi?id=529626Exploit, Issue Tracking, Third Party Advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6895Third Party Advisory
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9921Third Party Advisory
- https://rhn.redhat.com/errata/RHSA-2009-1540.htmlThird Party Advisory
- https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00190.htmlMailing List, Third 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.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00005.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.htmlMailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.