Public Date:
691270: CVE-2011-1478 kernel: gro: reset dev and skb_iff on skb reuse

The MITRE CVE dictionary describes this issue as:

The napi_reuse_skb function in net/core/dev.c in the Generic Receive Offload (GRO) implementation in the Linux kernel before 2.6.38 does not reset the values of certain structure members, which might allow remote attackers to cause a denial of service (NULL pointer dereference) via a malformed VLAN frame.

Find out more about CVE-2011-1478 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 4 as it did not support Generic Receive Offload (GRO). It has been addressed in Red Hat Enterprise Linux 5, 6, and Red Hat Enterprise MRG via, and

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 5.7
Base Metrics AV:A/AC:M/Au:N/C:N/I:N/A:C
Access Vector Adjacent Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux version 6 (kernel) RHSA-2011:0421 2011-04-08
Red Hat Enterprise Linux version 5 (kernel) RHSA-2011:0429 2011-04-12
Red Hat Enterprise Virtualization Hypervisor 5 (rhev-hypervisor) RHSA-2011:0439 2011-04-13
MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2011:1253 2011-09-12


Red Hat would like to thank Ryan Sweat for reporting this issue.