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NVD / CVE Program· CNA mitre

CVE-2009-2692: The Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does not initialize all function pointers for socket operations in prot

Noroxi assessment

Priority: Plan (action score 40/100)

  • A ready-made attack module is public (Metasploit); exploiting it takes no special expertise.
  • Because a ready-made attack tool exists, priority is at least “Plan”.
  • Probability of exploitation in the next 30 days: 14.6% (FIRST EPSS); higher than 96.6% of all records.
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: fai-kernels (Debian:4.0) 1.17+etch.24etch3; linux-2.6 (Debian:4.0) 2.6.18.dfsg.1-24etch3; linux-2.6.24 (Debian:4.0) 2.6.24-6~etchnhalf.8etch3.

Add it to your regular patch cycle. Upgrade to fai-kernels (Debian:4.0) 1.17+etch.24etch3; linux-2.6 (Debian:4.0) 2.6.18.dfsg.1-24etch3; linux-2.6.24 (Debian:4.0) 2.6.24-6~etchnhalf.8etch3 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 Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does not initialize all function pointers for socket operations in proto_ops structures, which allows local users to trigger a NULL pointer dereference and gain privileges by using mmap to map page zero, placing arbitrary code on this page, and then invoking an unavailable operation, as demonstrated by the sendpage operation (sock_sendpage function) on a PF_PPPOX socket.

HighCVSS 7.8 · v3.1—Weaponized Fix available
Published
Aug 14, 2009
Updated
Jun 16, 2026
EPSS
14.6% · 96th percentile

Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
4 / 30 · 14.6%
Ready-made attack tool
5 / 40 · floor: at least 40

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  • Not in KEV: no record of exploitation in the wild
  • Weaponized exploit exists
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • 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
suselinux enterprise real time
redhatenterprise linux desktop
redhatenterprise linux eus
redhatenterprise linux server
redhatenterprise linux server aus
redhatenterprise linux workstation

Affected versions

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

  • debian debian linux4.0
  • linux linux kernel2.6.0 and later · before 2.6.30.5
  • linux linux kernel2.4.4 and later · before 2.4.37.5
  • redhat enterprise linux desktop4.0
  • redhat enterprise linux desktop5.0
  • redhat enterprise linux eus4.8
  • redhat enterprise linux eus5.3
  • redhat enterprise linux server4.0
  • redhat enterprise linux server5.0
  • redhat enterprise linux server aus5.3
  • redhat enterprise linux workstation4.0
  • redhat enterprise linux workstation5.0
  • suse linux enterprise real time10

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:4.0fai-kernelsbefore 1.17+etch.24etch31.17+etch.24etch3
Debian:4.0linux-2.6before 2.6.18.dfsg.1-24etch32.6.18.dfsg.1-24etch3
Debian:4.0linux-2.6.24before 2.6.24-6~etchnhalf.8etch32.6.24-6~etchnhalf.8etch3
Debian:4.0user-mode-linuxbefore 2.6.18-1um-2etch.24etch32.6.18-1um-2etch.24etch3
Debian:5.0linux-2.6before 2.6.26-17lenny22.6.26-17lenny2
Red Hat:enterprise_linux:3::askernelbefore 0:2.4.21-60.EL0:2.4.21-60.EL
Red Hat:enterprise_linux:3::askernel-BOOTbefore 0:2.4.21-60.EL0:2.4.21-60.EL
Red Hat:enterprise_linux:3::askernel-debuginfobefore 0:2.4.21-60.EL0:2.4.21-60.EL
Red Hat:enterprise_linux:3::askernel-docbefore 0:2.4.21-60.EL0:2.4.21-60.EL
Red Hat:enterprise_linux:3::askernel-hugemembefore 0:2.4.21-60.EL0:2.4.21-60.EL
Red Hat:enterprise_linux:3::askernel-hugemem-unsupportedbefore 0:2.4.21-60.EL0:2.4.21-60.EL
Red Hat:enterprise_linux:3::askernel-smpbefore 0:2.4.21-60.EL0:2.4.21-60.EL
Red Hat:enterprise_linux:3::askernel-smp-unsupportedbefore 0:2.4.21-60.EL0:2.4.21-60.EL
Red Hat:enterprise_linux:3::askernel-sourcebefore 0:2.4.21-60.EL0:2.4.21-60.EL
Red Hat:enterprise_linux:3::askernel-unsupportedbefore 0:2.4.21-60.EL0:2.4.21-60.EL
Red Hat:enterprise_linux:4::askernelbefore 0:2.6.9-89.0.9.EL0:2.6.9-89.0.9.EL
Red Hat:enterprise_linux:4::askernel-debuginfobefore 0:2.6.9-89.0.9.EL0:2.6.9-89.0.9.EL
Red Hat:enterprise_linux:4::askernel-develbefore 0:2.6.9-89.0.9.EL0:2.6.9-89.0.9.EL
Red Hat:enterprise_linux:4::askernel-docbefore 0:2.6.9-89.0.9.EL0:2.6.9-89.0.9.EL
Red Hat:enterprise_linux:4::askernel-hugemembefore 0:2.6.9-89.0.9.EL0:2.6.9-89.0.9.EL
Red Hat:enterprise_linux:4::askernel-hugemem-develbefore 0:2.6.9-89.0.9.EL0:2.6.9-89.0.9.EL
Red Hat:enterprise_linux:4::askernel-largesmpbefore 0:2.6.9-89.0.9.EL0:2.6.9-89.0.9.EL
Red Hat:enterprise_linux:4::askernel-largesmp-develbefore 0:2.6.9-89.0.9.EL0:2.6.9-89.0.9.EL
Red Hat:enterprise_linux:4::askernel-smpbefore 0:2.6.9-89.0.9.EL0:2.6.9-89.0.9.EL

+65

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • 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

Published before and after this one in the same product

  • ← EarlierCVE-2009-2407Jul 31, 2009 · Heap-based buffer overflow in the parse_tag_3_packet function in fs/ecryptfs/keystore.c in the eCryptfs subsystem in the Linux kernel before
    27Monitor
  • ← EarlierCVE-2009-2691Aug 14, 2009 · The mm_for_maps function in fs/proc/base.c in the Linux kernel 2.6.30.4 and earlier allows local users to read (1) maps and (2) smaps files
    8Monitor
  • Later →CVE-2009-2768Aug 14, 2009 · The load_flat_shared_library function in fs/binfmt_flat.c in the flat subsystem in the Linux kernel before 2.6.31-rc6 allows local users to
    31Monitor

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:fai-kernels1.17+etch.24etch3 · Debian:4.0Package registry (OSV)
debian:linux-2.62.6.26-17lenny2 · Debian:5.0Package registry (OSV)
debian:linux-2.6.242.6.24-6~etchnhalf.8etch3 · Debian:4.0Package registry (OSV)
debian:user-mode-linux2.6.18-1um-2etch.24etch3 · Debian:4.0Package registry (OSV)
red hat:kernel0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-debug0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-debug-debuginfo0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-debug-devel0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-debuginfo0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-debuginfo-common0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-devel0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-doc0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-headers0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-PAE0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-PAE-debuginfo0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)
red hat:kernel-PAE-devel0:2.6.18-128.7.1.el5 · Red Hat:enterprise_linux:5::clientPackage registry (OSV)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1
  • Exploit-DB entry ×8
  • Proof-of-concept repository on GitHub ×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 entrylocal2009-08-18
Exploit-DB entrylocal2012-07-19
Exploit-DB entrylocal2009-08-31
Exploit-DB entrylocal2009-09-09
Exploit-DB entrylocal2009-08-24
Exploit-DB entrylocal2009-09-11
Exploit-DB entrylocal2009-08-14
Exploit-DB entrylocal2009-08-14
Metasploit moduleexploit/linux/local/sock_sendpageLinux Kernel Sendpage Local Privilege Escalationexploit2009-08-13
Proof-of-concept repository on GitHubstars:02018-07-12

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. Metasploit-1 d
  2. First PoCsame day
  3. Published
  4. TodayNov 7, 2026+6294 d

No history yet (it accumulates with the daily EPSS job).

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.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

CWE-908 · Use of Uninitialized Resource

CVSS vector

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

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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

References

Show all references (19 more)

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

All records