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CVE-2009-3612· NVD / CVE Program· CNA redhat

The tcf_fill_node function in net/sched/cls_api.c in the netlink subsystem in the Linux kernel 2.6.x before 2.6.32-rc5, and 2.4.37.6 and ear

Noroxi assessment

Priority: Monitor (action score 8/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.39% (FIRST EPSS).
  • No special conditions are required; it is repeatable.
  • Fixed version: linux-2.6 (Debian:4.0) 2.6.18.dfsg.1-26etch1; linux-2.6.24 (Debian:4.0) 2.6.24-6~etchnhalf.9etch1; linux-2.6 (Debian:5.0) 2.6.26-19lenny2.

Low priority for now. Upgrade to linux-2.6 (Debian:4.0) 2.6.18.dfsg.1-26etch1; linux-2.6.24 (Debian:4.0) 2.6.24-6~etchnhalf.9etch1; linux-2.6 (Debian:5.0) 2.6.26-19lenny2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

The tcf_fill_node function in net/sched/cls_api.c in the netlink subsystem in the Linux kernel 2.6.x before 2.6.32-rc5, and 2.4.37.6 and earlier, does not initialize a certain tcm__pad2 structure member, which might allow local users to obtain sensitive information from kernel memory via unspecified vectors. NOTE: this issue exists because of an incomplete fix for CVE-2005-4881.

LowCVSS 2.1 · v2.0—No exploit Fix available
Published
Oct 19, 2009
Updated
Jun 16, 2026
EPSS
0.4% · 32th percentile

Report tools

JSON

Action score

8

Monitor

Low priority for now.

CVSS
8 / 40 · 2.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2009-3612

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel
opensuseopensuse
suselinux enterprise desktop
suselinux enterprise server
suselinux enterprise software development kit
canonicalubuntu linux
fedoraprojectfedora

Affected versions

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

  • canonical ubuntu linux6.06
  • canonical ubuntu linux8.04
  • canonical ubuntu linux8.10
  • canonical ubuntu linux9.04
  • canonical ubuntu linux9.10
  • fedoraproject fedora10
  • linux linux kernelup to 2.4.37.6 inclusive
  • linux linux kernel2.6.0 and later · before 2.6.32
  • linux linux kernel2.6.32
  • opensuse opensuse11.0
  • suse linux enterprise desktop10
  • suse linux enterprise server10
  • suse linux enterprise software development kit10

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:4.0linux-2.6before 2.6.18.dfsg.1-26etch12.6.18.dfsg.1-26etch1
Debian:4.0linux-2.6.24before 2.6.24-6~etchnhalf.9etch12.6.24-6~etchnhalf.9etch1
Debian:5.0linux-2.6before 2.6.26-19lenny22.6.26-19lenny2
Red Hat:enterprise_linux:4::askernelbefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:4::askernel-debuginfobefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:4::askernel-develbefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:4::askernel-docbefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:4::askernel-hugemembefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:4::askernel-hugemem-develbefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:4::askernel-largesmpbefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:4::askernel-largesmp-develbefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:4::askernel-smpbefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:4::askernel-smp-develbefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:4::askernel-xenUbefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:4::askernel-xenU-develbefore 0:2.6.9-89.0.15.EL0:2.6.9-89.0.15.EL
Red Hat:enterprise_linux:5::clientkernelbefore 0:2.6.18-164.9.1.el50:2.6.18-164.9.1.el5
Red Hat:enterprise_linux:5::clientkernel-debugbefore 0:2.6.18-164.9.1.el50:2.6.18-164.9.1.el5
Red Hat:enterprise_linux:5::clientkernel-debug-debuginfobefore 0:2.6.18-164.9.1.el50:2.6.18-164.9.1.el5
Red Hat:enterprise_linux:5::clientkernel-debug-develbefore 0:2.6.18-164.9.1.el50:2.6.18-164.9.1.el5
Red Hat:enterprise_linux:5::clientkernel-debuginfobefore 0:2.6.18-164.9.1.el50:2.6.18-164.9.1.el5
Red Hat:enterprise_linux:5::clientkernel-debuginfo-commonbefore 0:2.6.18-164.9.1.el50:2.6.18-164.9.1.el5
Red Hat:enterprise_linux:5::clientkernel-develbefore 0:2.6.18-164.9.1.el50:2.6.18-164.9.1.el5
Red Hat:enterprise_linux:5::clientkernel-docbefore 0:2.6.18-164.9.1.el50:2.6.18-164.9.1.el5
Red Hat:enterprise_linux:5::clientkernel-headersbefore 0:2.6.18-164.9.1.el50:2.6.18-164.9.1.el5

+23

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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
debian:linux-2.62.6.26-19lenny2 · Debian:5.0Package registry (OSV)
debian:linux-2.6.242.6.24-6~etchnhalf.9etch1 · Debian:4.0Package registry (OSV)
red hat:kernel0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:kernel-debuginfo0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:kernel-devel0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:kernel-doc0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:kernel-hugemem0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:kernel-hugemem-devel0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:kernel-largesmp0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:kernel-largesmp-devel0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:kernel-smp0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:kernel-smp-devel0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:kernel-xenU0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage registry (OSV)
red hat:kernel-xenU-devel0:2.6.9-89.0.15.EL · Red Hat:enterprise_linux:4::asPackage 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
P · data can be read
Integrity
none
Availability
none
Attack complexity
Low
Confidentiality impact
P
Integrity impact
None
Availability impact
None

CVSS vector

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

nvd-primary

Root cause

The extension requests broader permissions than its function needs and sends the data it collects out for purposes beyond its stated function.

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

Vulnerable

json
{  "permissions": ["tabs", "<all_urls>"],  "background": { "service_worker": "analytics.js" }}

Fixed

json
{  "permissions": ["activeTab"],  "host_permissions": ["https://yildiz.example/*"]}

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

All records