CVE-2015-3290

Impact:
Important
Public Date:
2015-07-22
CWE:
CWE-435
Bugzilla:
1243465: CVE-2015-3290 kernel: x86: nested NMI handler and espfix64 interaction privilege escalation
A flaw was found in the way the Linux kernel's nested NMI handler and espfix64 functionalities interacted during NMI processing. A local, unprivileged user could use this flaw to crash the system or, potentially, escalate their privileges on the system.

Find out more about CVE-2015-3290 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 and 6 since they did not backport the nested NMI handler and espfix64 functionalities.

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2 since they did not backport the espfix64 functionality and also did not backport upstream commit e00b12e64be9a3 that allowed an unprivileged local user to re-enable NMIs from the NMI handler.

CVSS v2 metrics

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

Base Score 7.2
Base Metrics AV:L/AC:L/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Low
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).

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Not affected
Red Hat Enterprise Linux 7 kernel-rt Not affected
Red Hat Enterprise Linux 7 kernel Not affected
Red Hat Enterprise Linux 6 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected

Acknowledgements

Red Hat would like to thank Andy Lutomirski for reporting this issue.

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