NULL pointer dereference in Linux kernel - CVE-2011-2942
Published: June 8, 2013 / Updated: February 13, 2023
Vulnerability identifier: #VU94161
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-2942
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
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.
Affected software
Linux kernel
Ubuntu
linux-lts-backport-natty (Ubuntu package)
linux-lts-backport-oneiric (Ubuntu package)
Ubuntu
linux-lts-backport-natty (Ubuntu package)
linux-lts-backport-oneiric (Ubuntu package)
How to mitigate CVE-2011-2942
Install update from vendor's website.
linux-lts-backport-natty (Ubuntu package) - update to 2.6.38-12.51~lucid1
linux-lts-backport-oneiric (Ubuntu package) - update to 3.0.0-13.22~lucid1
linux-lts-backport-oneiric (Ubuntu package) - update to 3.0.0-13.22~lucid1