What’s Vulnerable › Vulnerabilities

CVE-2009-3621

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2009-10-22 · updated 2026-06-16
• Weakness: CWE-400

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.

Affected products

• Canonical Ubuntu Linux: 6.06, 8.04, 8.10, 9.04, 9.10
• Fedoraproject Fedora: 10
• Linux kernel: through 2.6.31.4
• Opensuse: 11.0, 11.2
• Suse Linux Enterprise Desktop: 10-sp2, 10-sp3
• SUSE Linux Enterprise: 10-sp2, 10-sp3
• VMware ESX: 4.0
• VMware Vma: 4.0

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.html
• http://lists.opensuse.org/opensuse-security-announce/2009-12/msg00005.html
• http://lists.opensuse.org/opensuse-security-announce/2010-01/msg00000.html
• http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00005.html
• http://lists.opensuse.org/opensuse-security-announce/2010-02/msg00007.html
• http://lists.vmware.com/pipermail/security-announce/2010/000082.html
• http://lkml.org/lkml/2009/10/19/50
• http://patchwork.kernel.org/patch/54678/
• http://secunia.com/advisories/37086
• http://secunia.com/advisories/37909
• http://secunia.com/advisories/38017

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