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    CVE-2011-2189

    net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high rate of creation and cleanup of network namespaces, which makes it easier for remote attackers to cause a denial of service (memory consumption) via requests to a daemon that requires a separate namespace per connection, as demonstrated by vsftpd.

    Published:Feb 16, 2011
    Last Modified:Apr 11, 2025
    EPS:Oct 10, 2011
    EPSS Score:0.07252
    CVSS Score:7.5

    Affected Products

    Vendor
    Canonical
    Product
    Ubuntu Linux
    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Enterprise Mrg

    Exploits

    http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629373https://bugs.launchpad.net/ubuntu/+source/linux/+bug/720095https://bugzilla.redhat.com/show_bug.cgi?id=711134https://bugzilla.redhat.com/show_bug.cgi?id=711245http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629373https://bugs.launchpad.net/ubuntu/+source/linux/+bug/720095https://bugzilla.redhat.com/show_bug.cgi?id=711134https://bugzilla.redhat.com/show_bug.cgi?id=711245https://www.exploit-db.com/exploits/36425

    Related CVEs

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    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…
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    References

    http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629373
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2b035b39970740722598f7a9d548835f9bdd730f
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f875bae065334907796da12523f9df85c89f5712
    http://ie.archive.ubuntu.com/linux/kernel/v2.6/ChangeLog-2.6.33
    http://kerneltrap.org/mailarchive/git-commits-head/2009/12/8/15289
    http://neil.brown.name/git?p=linux-2.6%3Ba=patch%3Bh=2b035b39970740722598f7a9d548835f9bdd730f
    http://patchwork.ozlabs.org/patch/88217/
    http://www.debian.org/security/2011/dsa-2305
    http://www.openwall.com/lists/oss-security/2011/06/06/10
    http://www.openwall.com/lists/oss-security/2011/06/06/20
    http://www.ubuntu.com/usn/USN-1288-1
    https://bugs.launchpad.net/ubuntu/+source/linux/+bug/720095
    https://bugzilla.redhat.com/show_bug.cgi?id=711134
    https://bugzilla.redhat.com/show_bug.cgi?id=711245
    http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629373
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2b035b39970740722598f7a9d548835f9bdd730f
    http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f875bae065334907796da12523f9df85c89f5712
    http://ie.archive.ubuntu.com/linux/kernel/v2.6/ChangeLog-2.6.33
    http://kerneltrap.org/mailarchive/git-commits-head/2009/12/8/15289
    http://neil.brown.name/git?p=linux-2.6%3Ba=patch%3Bh=2b035b39970740722598f7a9d548835f9bdd730f
    http://patchwork.ozlabs.org/patch/88217/
    http://www.debian.org/security/2011/dsa-2305
    http://www.openwall.com/lists/oss-security/2011/06/06/10
    http://www.openwall.com/lists/oss-security/2011/06/06/20
    http://www.ubuntu.com/usn/USN-1288-1
    https://bugs.launchpad.net/ubuntu/+source/linux/+bug/720095
    https://bugzilla.redhat.com/show_bug.cgi?id=711134
    https://bugzilla.redhat.com/show_bug.cgi?id=711245

    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