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Bug 568246 (CVE-2015-8558) - <app-emulation/qemu-2.5.0-r1: usb: infinite loop in ehci_advance_state results in DoS (CVE-2015-8558)
Summary: <app-emulation/qemu-2.5.0-r1: usb: infinite loop in ehci_advance_state result...
Alias: CVE-2015-8558
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B3 [glsa cve]
: 580426 (view as bug list)
Depends on:
Reported: 2015-12-14 15:20 UTC by Agostino Sarubbo
Modified: 2016-04-23 20:30 UTC (History)
1 user (show)

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


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Description Agostino Sarubbo gentoo-dev 2015-12-14 15:20:59 UTC
From ${URL} :

Qemu emulator built with the USB EHCI emulation support is vulnerable to an
infinite loop issue. It occurs during communication between host controller
interface(EHCI) and a respective device driver. These two communicate via a
isochronous transfer descriptor list(iTD) and an infinite loop unfolds if
there is a closed loop in this list.

A privileges user inside guest could use this flaw to consume excessive CPU
cycles & resources on the host.

Upstream fix:

This issue was discovered 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 2 SpanKY gentoo-dev 2016-01-18 05:00:24 UTC
fix is in qemu-2.5.0-r1 in the tree now
Comment 3 Agostino Sarubbo gentoo-dev 2016-01-26 15:03:14 UTC
The stabilization happened in bug 571566
Comment 4 Kristian Fiskerstrand (RETIRED) gentoo-dev 2016-01-26 19:06:12 UTC
Added to existing GLSA draft
Comment 5 GLSAMaker/CVETool Bot gentoo-dev 2016-02-04 09:35:00 UTC
This issue was resolved and addressed in
 GLSA 201602-01 at
by GLSA coordinator Kristian Fiskerstrand (K_F).
Comment 6 SpanKY gentoo-dev 2016-04-23 20:30:50 UTC
*** Bug 580426 has been marked as a duplicate of this bug. ***