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Fencer Intel
medium 6.8

CVE-2011-2942 json

A certain Red Hat patch to the __br_deliver function in net/bridge/br_forward.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHE…

published 2013-06-08 13 y ago modified 2026-06-16 4 mo ago also EUVD-2011-2910

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

A certain Red Hat patch to the __br_deliver function in net/bridge/br_forward.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact by leveraging connectivity to a network interface that uses an Ethernet bridge device.

Patch / fix

  • kernel RHEL 5 2.6.18-274.7.1.el5
  • kernel-PAE RHEL 5 2.6.18-274.7.1.el5
  • kernel-xen RHEL 5 2.6.18-274.7.1.el5
  • kernel-kdump RHEL 5 2.6.18-274.7.1.el5
  • kernel-debuginfo-common RHEL 5 2.6.18-274.7.1.el5

red hat advisories RHSA-2011:1386

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-2011-2942 updated cvss 6.1

kernel: bridge: null pointer dereference in __br_deliver

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) kernel 2.6.18-274.7.1.el5, kernel-PAE 2.6.18-274.7.1.el5, kernel-xen 2.6.18-274.7.1.el5, kernel-kdump 2.6.18-274.7.1.el5, kernel-debuginfo-common 2.6.18-274.7.1.el5 Red Hat Enterprise Linux Desktop (v. 5 client) kernel 2.6.18-274.7.1.el5, kernel-PAE 2.6.18-274.7.1.el5, kernel-xen 2.6.18-274.7.1.el5, kernel-debuginfo-common 2.6.18-274.7.1.el5
    fixed: vendor fix RHSA-2011:1386
  • Red Hat Enterprise Linux (v. 5 server) kernel-headers 2.6.18-274.7.1.el5 Red Hat Enterprise Linux 4 kernel Red Hat Enterprise Linux Desktop (v. 5 client) kernel-headers 2.6.18-274.7.1.el5 Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

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

1.79% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

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.