What is CVE-2011-1776?

CVE-2011-1776 is a medium-severity vulnerability in Linux Kernel, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.1/10. Published 2011-09-06.

How severe is CVE-2011-1776?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Buffer overflow in Linux Kernel

CVE-2011-1776

The is_gpt_valid function in fs/partitions/efi.c in the Linux kernel before 2.6.39 does not check the size of an Extensible Firmware Interface (EFI) GUID Partition Table (GPT) entry, which allows physically proximate attackers to cause a denial of service (heap-based buffer overflow and OOPS) or obtain sensitive information from kernel heap memory by connecting a crafted GPT storage device, a different vulnerability than CVE-2011-1577.

Vulnerability class: Buffer Overflow

Published 2011-09-06 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (43.5th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Linux Kernel
Red Hat Enterprise Linux Desktop — versions 5.0
Red Hat Enterprise Linux Server — versions 5.0
Red Hat Enterprise Linux Server Aus — versions 5.6
Red Hat Enterprise Linux Server Eus — versions 5.6
Red Hat Enterprise Linux Workstation — versions 5.0

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

rhn.redhat.com/errata/RHSA-2011-0927.html (vendor-advisory, Third Party Advisory)
openwall.com/lists/oss-security/2011/05/10/4 (mailing-list, Patch, Mailing List, Third Party Advisory)
securityreason.com/securityalert/8369 (Third Party Advisory, third-party-advisory)
www.securityfocus.com/bid/47796 (VDB Entry, Third Party Advisory, vdb-entry)
www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39 (Release Notes, Vendor Advisory)
git.kernel.org/
www.pre-cert.de/advisories/PRE-SA-2011-04.txt (Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2011-1776?: CVE-2011-1776 is a medium-severity vulnerability in Linux Kernel, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.1/10. Published 2011-09-06.
How severe is CVE-2011-1776?: Medium severity. CVSS v3 base score is 6.1 out of 10.