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Fencer Intel
medium 5.4

CVE-2011-1768 json

The tunnels implementation in the Linux kernel before 2.6.34, when tunnel functionality is configured as a module, allows remote attackers…

published 2012-06-13 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1767

cvss
5.4
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

The tunnels implementation in the Linux kernel before 2.6.34, when tunnel functionality is configured as a module, allows remote attackers to cause a denial of service (OOPS) by sending a packet during module loading.

Patch / fix

  • kernel RHEL 6 2.6.32-131.6.1.el6
  • perf RHEL 6 2.6.32-131.6.1.el6
  • kernel-kdump RHEL 6 2.6.32-131.6.1.el6
  • kernel-firmware RHEL 6 2.6.32-131.6.1.el6
  • kernel-bootwrapper RHEL 6 2.6.32-131.6.1.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-131.6.1.el6
  • kernel-debuginfo-common-ppc64 RHEL 6 2.6.32-131.6.1.el6
  • kernel-debuginfo-common-s390x RHEL 6 2.6.32-131.6.1.el6

red hat advisories RHSA-2011:0928RHSA-2011:1253

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-1768 updated cvss 5.4

kernel: netns vs proto registration ordering

  • Red Hat Enterprise MRG 1 kernel-rt
    affected: no fix available
  • Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-131.6.1.el6, kernel 2.6.32-131.6.1.el6, kernel-kdump 2.6.32-131.6.1.el6, kernel-firmware 2.6.32-131.6.1.el6, kernel-bootwrapper 2.6.32-131.6.1.el6, kernel-debuginfo-common-i686 2.6.32-131.6.1.el6, +3 more
    fixed: vendor fix RHSA-2011:0928
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 2.6.33.9-rt31.75.el6rt, kernel-rt-trace 2.6.33.9-rt31.75.el6rt, kernel-rt-vanilla 2.6.33.9-rt31.75.el6rt, kernel-rt-firmware 2.6.33.9-rt31.75.el6rt, kernel-rt-debuginfo-common-x86_64 2.6.33.9-rt31.75.el6rt
    fixed: vendor fix RHSA-2011:1253

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.13% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/torvalds/linux/commit/d5aa407f59f5b83d2c50ec88f5bf56d40f1f8978 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.4 AV:N/AC:H/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.