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Bug 568214 (CVE-2015-7549) - <app-emulation/qemu-2.4.1-r2: pci: msi-x: null pointer dereference issue (CVE-2015-7549)
Summary: <app-emulation/qemu-2.4.1-r2: pci: msi-x: null pointer dereference issue (CVE...
Alias: CVE-2015-7549
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B3 [glsa cve]
Depends on:
Reported: 2015-12-14 11:25 UTC by Agostino Sarubbo
Modified: 2016-02-04 09:34 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


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Description Agostino Sarubbo gentoo-dev 2015-12-14 11:25:54 UTC
From ${URL} :

Qemu emulator built with the PCI MSI-X support is vulnerable to null pointer 
dereference issue. It occurs when the controller attempts to write to the 
pending bit array(PBA) memory region. Because the MSI-X MMIO support did not 
define the .write method.

A privileges used inside guest could use this flaw to crash the Qemu process 
resulting in DoS issue.

Upstream fix:

CVE-2015-7549 has been assigned to this issue by Red Hat Inc.

This issue was reported by Qinghao Tang of QIHU 360 Marvel Team.

@maintainer(s): after the bump, in case we need to stabilize the package, please let us know if it is ready for the stabilization or not.
Comment 1 SpanKY gentoo-dev 2015-12-15 05:55:31 UTC
fixed with 2.4.1-r2.  fine for stable.
Comment 2 Agostino Sarubbo gentoo-dev 2015-12-16 08:52:39 UTC
amd64/x86 stable
Maintainer please cleanup
Comment 3 Agostino Sarubbo gentoo-dev 2015-12-18 17:06:55 UTC
cleanup done by vapier
Comment 4 Yury German Gentoo Infrastructure gentoo-dev 2015-12-21 17:24:01 UTC
Arches and Maintainer(s), Thank you for your work.

Added to an existing GLSA Request.
Comment 5 GLSAMaker/CVETool Bot gentoo-dev 2016-02-04 09:34:45 UTC
This issue was resolved and addressed in
 GLSA 201602-01 at
by GLSA coordinator Kristian Fiskerstrand (K_F).