CVE-2013-4563

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Summary

CVECVE-2013-4563
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2013-11-20 13:19:41 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionThe udp6_ufo_fragment function in net/ipv6/udp_offload.c in the Linux kernel through 3.12, when UDP Fragmentation Offload (UFO) is enabled, does not properly perform a certain size comparison before inserting a fragment header, which allows remote attackers to cause a denial of service (panic) via a large IPv6 UDP packet, as demonstrated by use of the Token Bucket Filter (TBF) queueing discipline.

Risk And Classification

Primary CVSS: v2.0 7.1 from [email protected]

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

EPSS: 0.015580000 probability, percentile 0.815390000 (date 2026-04-29)

Problem Types: CWE-189 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
None
Availability
Complete

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Canonical Ubuntu Linux 12.04 All All All
Operating System Canonical Ubuntu Linux 13.10 All All All
Operating System Linux Linux Kernel All All All All
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
[security-announce] openSUSE-SU-2014:0205-1: important: kernel to 3.11.1 af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
oss-security - CVE-2013-4563 -- Linux kernel: net: large udp packet over IPv6 over UFO-enabled device with TBF qdisc panic af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Mailing List, Patch
Bug 1030015 – CVE-2013-4563 kernel: net: large udp packet over IPv6 over UFO-enabled device with TBF qdisc panic af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking
USN-2113-1: Linux kernel (Saucy HWE) vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com Third Party Advisory
ipv6: fix headroom calculation in udp6_ufo_fragment · torvalds/linux@0e033e0 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Exploit, Patch
kernel/git/torvalds/linux.git - Linux kernel source tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Vendor Advisory
USN-2117-1: Linux kernel vulnerabilities | Ubuntu af854a3a-2127-422b-91ae-364da2661108 www.ubuntu.com Third Party Advisory
kernel/git/torvalds/linux.git - Linux kernel source tree MITRE git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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