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CVE-2011-4110

15
FAUCET Score

CVE-2011-4110 describes a denial-of-service vulnerability in the Linux kernel (versions 2.6) affecting the user_update function within the security/keys/user_defined.c file. This flaw allows a local attacker to trigger a NULL pointer dereference, leading to a kernel oops. The vulnerability has a low severity score (CVSS 2.1) due to its local attack vector and limited impact, resulting only in a denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.6CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:2.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.1LOW

AV:L/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.49%
Probability of exploitation in next 30 days
EPSS Percentile
39.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0049 is in the 74th percentile among its peer group of 2,096 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (7)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-274.12.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-220.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.1 EUS - Server OnlyFixed in: kernel-0:2.6.32-131.25.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-0:2.6.33.9-rt31.79.el6rt
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-0:3.0.18-rt34.53.el6rt
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2011-4110Moderate

kernel: keys: NULL pointer deref in the user-defined key type

Nov 15, 2011

References

marc.info
bugzilla.redhat.com / show_bug.cgi
Patch
secunia.com / advisories/47754
lkml.org / lkml/2011/11/15/363
Exploit
openwall.com / lists/oss-security/2011/11/21/19
openwall.com / lists/oss-security/2011/11/22/5
openwall.com / lists/oss-security/2011/11/22/6
securityfocus.com / bid/50755
ubuntu.com / usn/USN-1324-1
ubuntu.com / usn/USN-1328-1
ubuntu.com / usn/USN-1344-1