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CVE-2011-2689· NVD / CVE Program· CNA redhat

The gfs2_fallocate function in fs/gfs2/file.c in the Linux kernel before 3.0-rc1 does not ensure that the size of a chunk allocation is a mu

The gfs2_fallocate function in fs/gfs2/file.c in the Linux kernel before 3.0-rc1 does not ensure that the size of a chunk allocation is a multiple of the block size, which allows local users to cause a denial of service (BUG and system crash) by arranging for all resource groups to have too little free space.

MediumCVSS 4.9 · v2.0—No exploit Fix available
Published
Jul 28, 2011
Updated
Jun 16, 2026
EPSS
0.4% · 32th percentile
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Report tools

JSON

Action score

19

Monitor

Low priority for now.

CVSS
19 / 40 · 4.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

Affected systems

VendorProduct
linuxlinux kernel
redhatenterprise linux desktop
redhatenterprise linux server
redhatenterprise linux workstation

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelbefore 3.0
  • linux linux kernel3.0
  • redhat enterprise linux desktop5.0
  • redhat enterprise linux server5.0
  • redhat enterprise linux workstation5.0

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Red Hat:enterprise_linux:5::clientkernelbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-debugbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-debug-debuginfobefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-debug-develbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-debuginfobefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-debuginfo-commonbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-develbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-docbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-headersbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-PAEbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-PAE-debuginfobefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-PAE-develbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-xenbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-xen-debuginfobefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::clientkernel-xen-develbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::serverkernel-kdumpbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::serverkernel-kdump-debuginfobefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:5::serverkernel-kdump-develbefore 0:2.6.18-274.el50:2.6.18-274.el5
Red Hat:enterprise_linux:6::serverkernelbefore 0:2.6.32-131.12.1.el60:2.6.32-131.12.1.el6
Red Hat:enterprise_linux:6::serverkernel-bootwrapperbefore 0:2.6.32-131.12.1.el60:2.6.32-131.12.1.el6
Red Hat:enterprise_linux:6::serverkernel-debugbefore 0:2.6.32-131.12.1.el60:2.6.32-131.12.1.el6
Red Hat:enterprise_linux:6::serverkernel-debug-debuginfobefore 0:2.6.32-131.12.1.el60:2.6.32-131.12.1.el6
Red Hat:enterprise_linux:6::serverkernel-debug-develbefore 0:2.6.32-131.12.1.el60:2.6.32-131.12.1.el6
Red Hat:enterprise_linux:6::serverkernel-debuginfobefore 0:2.6.32-131.12.1.el60:2.6.32-131.12.1.el6

+13

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
red hat:kernel0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-debug0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-debug-debuginfo0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-debug-devel0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-debuginfo0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-debuginfo-common0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-devel0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-doc0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-headers0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-PAE0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-PAE-debuginfo0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-PAE-devel0:2.6.18-274.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
C · the service can be disrupted
Attack complexity
Low
Confidentiality impact
None
Integrity impact
None
Availability impact
C

CVSS vector

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

nvd-primary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

ts
function expand(node) {  return node.children.map(expand);}

Fixed

ts
const MAX_DEPTH = 32;function expand(node, depth = 0) {  if (depth > MAX_DEPTH) throw new Error("too deep");  return node.children.map((c) => expand(c, depth + 1));}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Noroxi analysis

No Noroxi analysis for this record yet

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Change log

  1. Fix✗ → ✓

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References

All records