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CVE Database

CVE-2008-7256

Impact: Important
Public: 2008-10-30
Bugzilla: 595970: CVE-2008-7256 CVE-2010-1643 kernel: nfsd: fix vm overcommit crash

Details

The MITRE CVE dictionary describes this issue as:

mm/shmem.c in the Linux kernel before 2.6.28-rc8, when strict overcommit is enabled and CONFIG_SECURITY is disabled, does not properly handle the export of shmemfs objects by knfsd, which allows attackers to cause a denial of service (NULL pointer dereference and knfsd crash) or possibly have unspecified other impact via unknown vectors. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-1643.

Find out more about CVE-2008-7256 from the MITRE CVE dictionary and NIST NVD.

Statement

This issue did not affect the version of Linux kernel as shipped with Red Hat Enterprise Linux 3, 4 and 5 as they did not include nfs-export support for tmpfs. A future kernel update in Red Hat Enterprise MRG will address this issue.

CVSS v2 metrics

Base Score: 6.9
Base Metrics: AV:L/AC:M/Au:N/C:C/I:C/A:C
Access Vector: Local
Access Complexity: Medium
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
MRG Grid for RHEL 5 Server (kernel-rt) RHSA-2010:0631 August 17, 2010

External References

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For clarification or corrections please contact the Red Hat Security Response Team.