Public Date:
998401: CVE-2013-4247 kernel: cifs: off-by-one bug in build_unc_path_to_root

The MITRE CVE dictionary describes this issue as:

Off-by-one error in the build_unc_path_to_root function in fs/cifs/connect.c in the Linux kernel before 3.9.6 allows remote attackers to cause a denial of service (memory corruption and system crash) via a DFS share mount operation that triggers use of an unexpected DFS referral name length.

Find out more about CVE-2013-4247 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6 and Red Hat Enterprise MRG 2.

CVSS v2 metrics

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

Base Score 4.6
Base Metrics AV:A/AC:H/Au:N/C:N/I:N/A:C
Access Vector Adjacent Network
Access Complexity High
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).

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 7 kernel Not affected
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected