CVE-2015-5156

Impact:
Moderate
Public Date:
2015-08-06
CWE:
CWE-122
Bugzilla:
1243852: CVE-2015-5156 kernel: buffer overflow with fraglist larger than MAX_SKB_FRAGS + 2 in virtio-net
A buffer overflow flaw was found in the way the Linux kernel's virtio-net subsystem handled certain fraglists when the GRO (Generic Receive Offload) functionality was enabled in a bridged network configuration. An attacker on the local network could potentially use this flaw to crash the system, or, although unlikely, elevate their privileges on the system.

Find out more about CVE-2015-5156 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue did not affect the Linux kernel packages as shipped with Red Hat Enterprise MRG 2.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. Red Hat Enterprise Linux 5 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.

CVSS v2 metrics

Base Score 6.8
Base Metrics AV:A/AC:H/Au:N/C:C/I:C/A:C
Access Vector Adjacent Network
Access Complexity High
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
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 for Real Time for NFV (v. 7) (kernel-rt) RHSA-2015:1977 2015-11-03
Red Hat Enterprise Linux 7 (kernel) RHSA-2015:1978 2015-11-03
Red Hat Enterprise Linux 6 (kernel) RHSA-2016:0855 2016-05-10

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Not affected
Red Hat Enterprise Linux 5 kernel Will not fix

Acknowledgements

This issue was discovered by Jason Wang of Red Hat.
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