CVE-2011-2189
net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high...
CVE-2011-2189 is a high vulnerability (CVSS 7.5) in Debian Linux, published October 10, 2011. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 17.9%, the 97th percentile. Fixed in vsftpd 2.3.4-1.
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2011-2189- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 7.8 High
AV:N/AC:L/Au:N/C:N/I:N/A:C - Weakness
- CWE-400
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2011-2189- Updated
- 2026-11-02
EUVDEUVD-2011-2180 No score
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.
- Record
EUVD-2011-2180- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-cwc9-v946-jvqj
net/core/net_namespace.c in the Linux kernel 2.6.32 and earlier does not properly handle a high...
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.
- Record
GHSA-cwc9-v946-jvqj- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-400
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2011-2189- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-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.
- Record
DEBIAN-CVE-2011-2189- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | Linux Kernel 2.6.35 - Network Namespace Remote Denial of Service | 2011-12-06 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | aliases | EUVD |
| 2026-11-02 | created | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV |
References
bugzilla.redhat.com/show_bug.cgi?id=711245
bugs.launchpad.net/ubuntu/+source/linux/+bug/720095
neil.brown.name/git?p=linux-2.6%3Ba=patch%3Bh=2b035b39970740722598f7a9d548835f9bdd730f
openwall.com/lists/oss-security/2011/06/06/20
ie.archive.ubuntu.com/linux/kernel/v2.6/ChangeLog-2.6.33
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debian.org/security/2011/dsa-2305
patchwork.ozlabs.org/patch/88217
kerneltrap.org/mailarchive/git-commits-head/2009/12/8/15289
bugs.debian.org/cgi-bin/bugreport.cgi?bug=629373
ubuntu.com/usn/USN-1288-1
git.kernel.org?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=2b035b39970740722598f7a9d548835f9bdd730f
nvd.nist.gov/vuln/detail/CVE-2011-2189
github.com/advisories/GHSA-cwc9-v946-jvqj
security-tracker.debian.org/tracker/CVE-2011-2189