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CVE-2013-4470· NVD / CVE Program· CNA redhat

The Linux kernel before 3.12, when UDP Fragmentation Offload (UFO) is enabled, does not properly initialize certain data structures, which a

Noroxi assessment

Priority: Monitor (action score 27/100)

  • 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: 0.58% (FIRST EPSS).
  • Fixed version: linux (Debian:12) 3.11.7-1; linux-2.6 (Debian:6.0) 2.6.32-48squeeze8; kernel (Red Hat:enterprise_linux:6::client) 0:2.6.32-431.1.2.el6.

Low priority for now. Upgrade to linux (Debian:12) 3.11.7-1; linux-2.6 (Debian:6.0) 2.6.32-48squeeze8; kernel (Red Hat:enterprise_linux:6::client) 0:2.6.32-431.1.2.el6 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 Linux kernel before 3.12, when UDP Fragmentation Offload (UFO) is enabled, does not properly initialize certain data structures, which allows local users to cause a denial of service (memory corruption and system crash) or possibly gain privileges via a crafted application that uses the UDP_CORK option in a setsockopt system call and sends both short and long packets, related to the ip_ufo_append_data function in net/ipv4/ip_output.c and the ip6_ufo_append_data function in net/ipv6/ip6_output.c.

MediumCVSS 6.9 · v2.0—No exploit Fix available
Published
Nov 4, 2013
Updated
Jun 16, 2026
EPSS
0.6% · 47th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
27 / 40 · 6.9 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

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

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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

Affected versions

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

  • linux linux kernelup to 3.11.7 inclusive
  • linux linux kernel3.0
  • linux linux kernel3.0.1
  • linux linux kernel3.0.10
  • linux linux kernel3.0.11
  • linux linux kernel3.0.12
  • linux linux kernel3.0.13
  • linux linux kernel3.0.14
  • linux linux kernel3.0.15
  • linux linux kernel3.0.16
  • linux linux kernel3.0.17
  • linux linux kernel3.0.18
  • linux linux kernel3.0.19
  • linux linux kernel3.0.2
  • linux linux kernel3.0.20
  • linux linux kernel3.0.21
  • linux linux kernel3.0.22
  • linux linux kernel3.0.23
  • linux linux kernel3.0.24
  • linux linux kernel3.0.25

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 3.11.7-13.11.7-1
Debian:6.0linux-2.6before 2.6.32-48squeeze82.6.32-48squeeze8
Red Hat:enterprise_linux:6::clientkernelbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientkernel-abi-whitelistsbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientkernel-debugbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientkernel-debug-debuginfobefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientkernel-debug-develbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientkernel-debuginfobefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientkernel-debuginfo-common-i686before 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientkernel-debuginfo-common-x86_64before 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientkernel-develbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientkernel-docbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientkernel-firmwarebefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientperfbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientperf-debuginfobefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientpython-perfbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::clientpython-perf-debuginfobefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::serverkernel-bootwrapperbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::serverkernel-debuginfo-common-ppc64before 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::serverkernel-debuginfo-common-s390xbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::serverkernel-kdumpbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::serverkernel-kdump-debuginfobefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_linux:6::serverkernel-kdump-develbefore 0:2.6.32-431.1.2.el60:2.6.32-431.1.2.el6
Red Hat:enterprise_mrg:2:server:el6kernel-rtbefore 0:3.8.13-rt27.33.el6rt0:3.8.13-rt27.33.el6rt

+34

Same product

linux: all records

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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:linux3.11.7-1 · Debian:12Package registry (OSV)
debian:linux-2.62.6.32-48squeeze8 · Debian:6.0Package registry (OSV)
red hat:kernel0:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-abi-whitelists0:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debug0:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debug-debuginfo0:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debug-devel0:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debuginfo0:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debuginfo-common-i6860:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-debuginfo-common-x86_640:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-devel0:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-doc0:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:kernel-firmware0:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::clientPackage registry (OSV)
red hat:perf0:2.6.32-431.1.2.el6 · Red Hat:enterprise_linux:6::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.

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

    If successful

    Confidentiality
    C · data can be read
    Integrity
    C · data or configuration can be modified
    Availability
    C · the service can be disrupted
    Attack complexity
    M
    Confidentiality impact
    C
    Integrity impact
    C
    Availability impact
    C

    Weakness class (CWE)

    CWE-264 · Permissions, Privileges, and Access Controls

    CVSS vector

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

    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