HIGH
CVE-2011-4326
CWE-399Published: May 17, 2012· Updated: Jun 16, 2026
7.1
CVSS v3.1
Official Description
The udp6_ufo_fragment function in net/ipv6/udp.c in the Linux kernel before 2.6.39, when a certain UDP Fragmentation Offload (UFO) configuration is enabled, allows remote attackers to cause a denial of service (system crash) by sending fragmented IPv6 UDP packets to a bridge device.
Technical Analysis
CVE-2011-4326 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityM
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityNone
IntegrityNone
AvailabilityC
AV:N/AC:M/Au:N/C:N/I:N/A:C
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (16)
→
http://downloads.avaya.com/css/P8/documents/100156038Third Party Advisory
→
http://www.securityfocus.com/bid/50751Third Party Advisory · VDB Entry
→
https://bugzilla.redhat.com/show_bug.cgi?id=682066Exploit · Issue Tracking · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=755584Issue Tracking · Third Party Advisory
→
https://github.com/torvalds/linux/commit/a9cf73ea7ff78f52662c8658d93c226effbbeddePatch · Third Party Advisory
→
http://downloads.avaya.com/css/P8/documents/100156038Third Party Advisory
→
http://www.securityfocus.com/bid/50751Third Party Advisory · VDB Entry
→
https://bugzilla.redhat.com/show_bug.cgi?id=682066Exploit · Issue Tracking · Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=755584Issue Tracking · Third Party Advisory
Quick Facts
CVE IDCVE-2011-4326
CVSS Score7.1 / 10
SeverityHIGH
WeaknessCWE-399
CISA KEVNo
Affected2 vendor(s)
PublishedMay 17, 2012
Related CVEs (CWE-399)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2011-4326 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.