CVE-2011-2189 EXPLOIT
7.5
HIGH · CVSS 3.1 · EPSS 17.9% (pctl 97)
Patch early
A public exploit exists.
Description
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.
Scoring
| CVSS | 7.5 (HIGH, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| EPSS | 17.85% — more likely to be exploited than 97% of all CVEs |
| Weakness | CWE-400 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2011-10-10 |
| Last modified | 2026-06-16 |
Affected (5)
| Vendor | Product |
|---|---|
| canonical | ubuntu linux |
| debian | debian linux |
| linux | linux kernel |
| redhat | enterprise linux |
| redhat | enterprise mrg |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Linux Kernel 2.6.35 - Network Namespace Remote Denial of Service | 2011-12-06 |
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
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