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CVE-2011-1776

21
FAUCET Score

CVE-2011-1776 describes a heap-based buffer overflow in the Linux kernel (before 2.6.39) affecting the handling of Extensible Firmware Interface (EFI) GUID Partition Tables (GPT). This vulnerability, also present in Red Hat distributions, allows a physically proximate attacker to trigger a denial of service (system crash) or potentially leak sensitive kernel memory. With a CVSS score of 6.1 (Medium), it requires physical access but is low complexity, offering high impact on confidentiality and availability. There is no evidence of active exploitation, public 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:*:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_desktop:5.0:*:*:*:*:*:*:*
5.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server:5.0:*:*:*:*:*:*:*
5.6CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server_aus:5.6:*:*:*:*:*:*:*
5.6CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server_eus:5.6:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.1MEDIUM

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

Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
0.9
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.54%
Probability of exploitation in next 30 days
EPSS Percentile
42.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0054 is in the 80th percentile among its peer group of 1,531 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-238.19.1.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-131.12.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-0:2.6.33.9-rt31.75.el6rt
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise MRG 1Fixed in: kernel-rt

Vendor Advisories (1)

redhatCVE-2011-1776Low

kernel: validate size of EFI GUID partition entries

May 6, 2011

References

git.kernel.org
openwall.com / lists/oss-security/2011/05/10/4
Mailing ListPatchThird Party Advisory
rhn.redhat.com / errata/RHSA-2011-0927.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
securityreason.com / securityalert/8369
Third Party Advisory
kernel.org / pub/linux/kernel/v2.6/ChangeLog-2.6.39
Release NotesVendor Advisory
pre-cert.de / advisories/PRE-SA-2011-04.txt
Third Party Advisory
securityfocus.com / bid/47796
Third Party AdvisoryVDB Entry