Bug 1160643 (CVE-2014-8595, xsa110) - CVE-2014-8595 kernel: xen: Missing privilege level checks in x86 emulation of far branches (xsa110)
Summary: CVE-2014-8595 kernel: xen: Missing privilege level checks in x86 emulation of...
Alias: CVE-2014-8595, xsa110
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 1165204
Blocks: 1160648
TreeView+ depends on / blocked
Reported: 2014-11-05 10:11 UTC by Petr Matousek
Modified: 2021-02-17 06:02 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2014-11-05 10:14:48 UTC

Attachments (Terms of Use)

Description Petr Matousek 2014-11-05 10:11:49 UTC
The emulation of far branch instructions (CALL, JMP, and RETF in Intel
assembly syntax, LCALL, LJMP, and LRET in AT&T assembly syntax)
incompletely performs privilege checks.

Malicious HVM guest user mode code may be able to elevate its
privileges to guest supervisor mode, or to crash the guest.


Red Hat would like to thank the Xen for reporting this issue.

Comment 3 Petr Matousek 2014-11-05 10:14:48 UTC

Not vulnerable.

This issue did not affect the versions of the kernel-xen package as shipped with Red Hat Enterprise Linux 5.

Comment 4 Vincent Danen 2014-11-18 14:44:42 UTC
External References:


Comment 5 Vincent Danen 2014-11-18 14:45:41 UTC
Created xen tracking bugs for this issue:

Affects: fedora-all [bug 1165204]

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