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CVE-2009-2698· NVD / CVE Program· CNA mitre

The udp_sendmsg function in the UDP implementation in (1) net/ipv4/udp.c and (2) net/ipv6/udp.c in the Linux kernel before 2.6.19 allows loc

Noroxi assessment

Priority: Monitor (action score 33/100)

  • Public proof-of-concept code exists (Exploit-DB, GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 7.1% (FIRST EPSS); higher than 94.1% 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.24etch4; linux-2.6 (Debian:4.0) 2.6.18.dfsg.1-24etch4; user-mode-linux (Debian:4.0) 2.6.18-1um-2etch.24etch4.

Low priority for now. Upgrade to fai-kernels (Debian:4.0) 1.17+etch.24etch4; linux-2.6 (Debian:4.0) 2.6.18.dfsg.1-24etch4; user-mode-linux (Debian:4.0) 2.6.18-1um-2etch.24etch4 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 udp_sendmsg function in the UDP implementation in (1) net/ipv4/udp.c and (2) net/ipv6/udp.c in the Linux kernel before 2.6.19 allows local users to gain privileges or cause a denial of service (NULL pointer dereference and system crash) via vectors involving the MSG_MORE flag and a UDP socket.

HighCVSS 7.8 · v3.1—Proof of concept Fix available
Published
Aug 27, 2009
Updated
Jun 16, 2026
EPSS
7.1% · 94th percentile

Report tools

JSON

Action score

33

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 7.1%

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.

Follow CVE-2009-2698

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
canonicalubuntu linux
suselinux enterprise desktop
suselinux enterprise server
fedoraprojectfedora
redhatenterprise linux desktop
redhatenterprise linux eus
redhatenterprise linux server
redhatenterprise linux server aus
redhatenterprise linux workstation
vmwarevcenter server
vmwareesxi

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
  • fedoraproject fedora10
  • linux linux kernelbefore 2.6.19
  • 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 desktop10
  • suse linux enterprise server10
  • suse linux enterprise server9
  • vmware esxi4.0
  • vmware vcenter server4.0

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.24etch41.17+etch.24etch4
Debian:4.0linux-2.6before 2.6.18.dfsg.1-24etch42.6.18.dfsg.1-24etch4
Debian:4.0user-mode-linuxbefore 2.6.18-1um-2etch.24etch42.6.18-1um-2etch.24etch4
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
Red Hat:enterprise_linux:4::askernel-smp-develbefore 0:2.6.9-89.0.9.EL0:2.6.9-89.0.9.EL
Red Hat:enterprise_linux:4::askernel-xenUbefore 0:2.6.9-89.0.9.EL0:2.6.9-89.0.9.EL

+49

Same product

linux: all records

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  • 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
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  • CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV
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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:fai-kernels1.17+etch.24etch4 · Debian:4.0Package registry (OSV)
debian:linux-2.62.6.18.dfsg.1-24etch4 · Debian:4.0Package registry (OSV)
debian:user-mode-linux2.6.18-1um-2etch.24etch4 · 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

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 ×3
  • 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 entrylocal2009-09-02
Exploit-DB entrylocal2009-09-02
Exploit-DB entrylocal2009-08-31
Proof-of-concept repository on GitHubstars:292018-02-16

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. Published
  2. First PoC+3 d
  3. TodayOct 13, 2026+6256 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.
  • 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-476 · NULL Pointer Dereference

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