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CVE-2011-2534

25
FAUCET Score

CVE-2011-2534 describes a buffer overflow vulnerability in the Linux kernel's netfilter ipt_CLUSTERIP module, specifically within the clusterip_proc_write function, affecting versions prior to 2.6.39. This flaw arises from improper handling of string data lacking a null terminator. With a CVSS score of 7.8 (High), this vulnerability allows a local attacker to potentially cause a denial of service or achieve other unspecified impacts with high confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.6.39CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.46%
Probability of exploitation in next 30 days
EPSS Percentile
37.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0046 is in the 78th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia nvd_reference
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel
redhatno patchvia redhat_api
Product: Red Hat Enterprise MRG 1Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2011-2534Low

ipv4: netfilter: ipt_CLUSTERIP: fix buffer overflow

Mar 10, 2011

References

git.kernel.org
marc.info
PatchThird Party Advisory
marc.info
PatchThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
securityreason.com / securityalert/8284
Third Party Advisory
kernel.org / pub/linux/kernel/v2.6/ChangeLog-2.6.39
Release NotesVendor Advisory
openwall.com / lists/oss-security/2011/03/18/15
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2011/03/21/1
Mailing ListPatchThird Party Advisory
openwall.com / lists/oss-security/2011/03/21/4
Mailing ListPatchThird Party Advisory
securityfocus.com / bid/46921
Third Party AdvisoryVDB Entry