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    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 series of connect operations to this socket.

    Published:Oct 19, 2009
    Last Modified:Apr 23, 2026
    EPS:Oct 22, 2009
    EPSS Score:0.00072
    CVSS Score:5.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Fedoraproject
    Product
    Fedora
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Opensuse
    Product
    Opensuse
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Mrg
    Vendor
    Suse
    Product
    Suse Linux Enterprise Desktop
    Vendor
    Suse
    Product
    Suse Linux Enterprise Server
    Vendor
    Vmware
    Product
    Esx
    Vendor
    Vmware
    Product
    Vma

    Exploits

    http://patchwork.kernel.org/patch/54678/http://www.openwall.com/lists/oss-security/2009/10/19/2http://www.openwall.com/lists/oss-security/2009/10/19/4https://bugzilla.redhat.com/show_bug.cgi?id=529626http://patchwork.kernel.org/patch/54678/http://www.openwall.com/lists/oss-security/2009/10/19/2http://www.openwall.com/lists/oss-security/2009/10/19/4https://bugzilla.redhat.com/show_bug.cgi?id=529626https://www.exploit-db.com/exploits/10022

    Related CVEs

    CVE-2026-13476 (CVSS 7.3) — IBM Informix Dynamic Server 14.10, 15.0, and 12.10 could allow an unauthenticated user to execute arbitrary co…
    CVE-2026-13367 (CVSS 7.8) — IBM Informix Dynamic Server 14.10, and 15.0 contain a local privilege escalation vulnerability in the oninit s…
    CVE-2026-47337 (CVSS 3.3) — Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling …
    CVE-2026-47336 (CVSS 3.3) — Ubuntu Linux 6.8 contains SAUCE patches with a possible use of an uninitialized variable in AppArmor AF_INET/A…
    CVE-2026-47335 (CVSS 5.5) — Ubuntu Linux 6.8 contains SAUCE patches with a possible NULL pointer dereference in the handling of AppArmor n…
    CVE-2026-47334 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock…
    CVE-2026-47333 (CVSS 7.8) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the si…
    CVE-2026-47332 (CVSS 5.5) — Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly validate the size of an intern…
    CVE-2026-47331 (CVSS 7.8) — Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An…
    CVE-2026-47330 (CVSS 3.3) — Ubuntu Linux 6.8, 7.17 and 7.0 contain AppArmor SAUCE patches which can, under certain circumstances, use an u…

    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
    http://secunia.com/advisories/38794
    http://secunia.com/advisories/38834
    http://www.mandriva.com/security/advisories?name=MDVSA-2009:329
    http://www.openwall.com/lists/oss-security/2009/10/19/2
    http://www.openwall.com/lists/oss-security/2009/10/19/4
    http://www.redhat.com/support/errata/RHSA-2009-1670.html
    http://www.redhat.com/support/errata/RHSA-2009-1671.html
    http://www.ubuntu.com/usn/usn-864-1
    http://www.vupen.com/english/advisories/2010/0528
    https://bugzilla.redhat.com/show_bug.cgi?id=529626
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6895
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9921
    https://rhn.redhat.com/errata/RHSA-2009-1540.html
    https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00190.html
    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
    http://secunia.com/advisories/38794
    http://secunia.com/advisories/38834
    http://www.mandriva.com/security/advisories?name=MDVSA-2009:329
    http://www.openwall.com/lists/oss-security/2009/10/19/2
    http://www.openwall.com/lists/oss-security/2009/10/19/4
    http://www.redhat.com/support/errata/RHSA-2009-1670.html
    http://www.redhat.com/support/errata/RHSA-2009-1671.html
    http://www.ubuntu.com/usn/usn-864-1
    http://www.vupen.com/english/advisories/2010/0528
    https://bugzilla.redhat.com/show_bug.cgi?id=529626
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6895
    https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9921
    https://rhn.redhat.com/errata/RHSA-2009-1540.html
    https://www.redhat.com/archives/fedora-package-announce/2009-November/msg00190.html

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High