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CVE-2009-1961· NVD / CVE Program· CNA mitre

The inode double locking code in fs/ocfs2/file.c in the Linux kernel 2.6.30 before 2.6.30-rc3, 2.6.27 before 2.6.27.24, 2.6.29 before 2.6.29

Noroxi assessment

Priority: Monitor (action score 18/100)

  • Public proof-of-concept code exists (Exploit-DB); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.58% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: linux-2.6.24 (Debian:4.0) 2.6.24-6~etchnhalf.8etch2; kernel-rt (Red Hat:enterprise_mrg:1::el5) 0:2.6.24.7-126.el5rt; kernel-rt-debug (Red Hat:enterprise_mrg:1::el5) 0:2.6.24.7-126.el5rt.

Low priority for now. Upgrade to linux-2.6.24 (Debian:4.0) 2.6.24-6~etchnhalf.8etch2; kernel-rt (Red Hat:enterprise_mrg:1::el5) 0:2.6.24.7-126.el5rt; kernel-rt-debug (Red Hat:enterprise_mrg:1::el5) 0:2.6.24.7-126.el5rt 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

Primary sources: NVD · CVE.org · FIRST EPSS

The inode double locking code in fs/ocfs2/file.c in the Linux kernel 2.6.30 before 2.6.30-rc3, 2.6.27 before 2.6.27.24, 2.6.29 before 2.6.29.4, and possibly other versions down to 2.6.19 allows local users to cause a denial of service (prevention of file creation and removal) via a series of splice system calls that trigger a deadlock between the generic_file_splice_write, splice_from_pipe, and ocfs2_file_splice_write functions.

MediumCVSS 4.7 · v3.1—Proof of concept Fix available
Published
Jun 7, 2009
Updated
Jun 16, 2026
EPSS
0.5% · 47th percentile

Report tools

JSON

Action score

18

Monitor

Low priority for now.

CVSS
18 / 40 · 4.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

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

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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
debiandebian linux
canonicalubuntu linux
opensuseopensuse
suselinux enterprise
suselinux enterprise desktop
suselinux enterprise server

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
  • debian debian linux4.0
  • linux linux kernelup to 2.6.19 inclusive
  • linux linux kernel2.6.27 and later · before 2.6.27.24
  • linux linux kernel2.6.29 and later · before 2.6.29.4
  • linux linux kernel2.6.30
  • opensuse opensuse10.3
  • opensuse opensuse11.1
  • suse linux enterprise11.0
  • suse linux enterprise desktop11
  • suse linux enterprise server11

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:4.0linux-2.6.24before 2.6.24-6~etchnhalf.8etch22.6.24-6~etchnhalf.8etch2
Red Hat:enterprise_mrg:1::el5kernel-rtbefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-debugbefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-debug-debuginfobefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-debug-develbefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-debuginfobefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-debuginfo-commonbefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-develbefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-docbefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-tracebefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-trace-debuginfobefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-trace-develbefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-vanillabefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-vanilla-debuginfobefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt
Red Hat:enterprise_mrg:1::el5kernel-rt-vanilla-develbefore 0:2.6.24.7-126.el5rt0:2.6.24.7-126.el5rt

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2009-1633May 28, 2009 · Multiple buffer overflows in the cifs subsystem in the Linux kernel before 2.6.29.4 allow remote CIFS servers to cause a denial of service (
    29Monitor
  • ← EarlierCVE-2009-1914Jun 4, 2009 · The pci_register_iommu_region function in arch/sparc/kernel/pci_common.c in the Linux kernel before 2.6.29 on the sparc64 platform allows lo
    19Monitor
  • Later →CVE-2009-2287Jul 1, 2009 · The kvm_arch_vcpu_ioctl_set_sregs function in the KVM in Linux kernel 2.6 before 2.6.30, when running on x86 systems, does not validate the
    19Monitor

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-2.6.242.6.24-6~etchnhalf.8etch2 · Debian:4.0Package registry (OSV)
red hat:kernel-rt0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-debug0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-debug-debuginfo0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-debug-devel0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-debuginfo0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-debuginfo-common0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-devel0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-doc0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-trace0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-trace-debuginfo0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-trace-devel0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)
red hat:kernel-rt-vanilla0:2.6.24.7-126.el5rt · Red Hat:enterprise_mrg:1::el5Package registry (OSV)

Exploit status

Proof of concept available

A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.

Evidence

  • Exploit-DB entry ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Exploit-DB entrydos2009-05-29

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.

  1. First PoC-10 d
  2. Published
  3. TodayOct 19, 2026+6343 d
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.

Credits

All researchers

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

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-667 · Improper Locking

CVSS vector

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

nvd-primary

Attack context

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

Change log

  1. Fix✗ → ✓

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

References

Show all references (15 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records