Read the docs
TI-2011-03792 Aliases CVE-2011-4326GHSA-c3pq-m2gr-f3r7

The udp6_ufo_fragment function in net/ipv6/udp.c in the Linux kernel before 2.6.39, when…

Priority LOW 37CWE-399Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Medium
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Complete
Fix status
Fixed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-399 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.03176 88th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 2.6.39VulnerableLinux
cpe:2.3:o:avaya:96x1_ip_deskphone_firmware:*:*:*:*:*:*:*:*6.0.0 – 6.6.0VulnerableAvaya
cpe:2.3:h:avaya:96x1_ip_deskphone:-:*:*:*:*:*:*:*not specified by NVDRunning onAvaya
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 2.6.39 Vulnerable ·Linux
  • cpe:2.3:o:avaya:96x1_ip_deskphone_firmware:*:*:*:*:*:*:*:* Versions 6.0.0 – 6.6.0 Vulnerable ·Avaya
  • cpe:2.3:h:avaya:96x1_ip_deskphone:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Avaya

Remediation

Red Hat 2 advisories

  • RHSA-2012:0010 Released 2012-01-10 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-2.6.33.9-rt31.79.el6rt, kernel-rt-debug-2.6.33.9-rt31.79.el6rt, kernel-rt-debug-devel-2.6.33.9-rt31.79.el6rt +7
  • RHSA-2011:1465 Released 2011-11-22 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-131.21.1.el6, kernel-bootwrapper-2.6.32-131.21.1.el6, kernel-debug-2.6.32-131.21.1.el6 +8

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2011:1465
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2012:0010
Not affected: 2 products
  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-4326
  2. 2026-10-03 Alias added: GHSA-c3pq-m2gr-f3r7

References

Exploit 1

Patch 1

Advisory 2

Other 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences