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Bug 739948 (CVE-2020-14339) - <app-emulation/libvirt-6.7.0: Unintended access to /dev/mapper/control (CVE-2020-14339)
Summary: <app-emulation/libvirt-6.7.0: Unintended access to /dev/mapper/control (CVE-2...
Alias: CVE-2020-14339
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal major (vote)
Assignee: Gentoo Security
Whiteboard: C1 [glsa+]
Depends on: CVE-2020-25637
  Show dependency tree
Reported: 2020-09-02 03:01 UTC by Sam James
Modified: 2021-01-26 00:22 UTC (History)
2 users (show)

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


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Description Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-09-02 03:01:55 UTC
"A flaw was found in libvirt, where it leaked a file descriptor for `/dev/mapper/control` into the QEMU process. This file descriptor allows for privileged operations to happen against the device-mapper on the host. This flaw allows a malicious guest user or process to perform operations outside of their standard permissions, potentially causing serious damage to the host operating system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability."
Comment 1 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-09-02 03:02:46 UTC
In 6.6.0's release notes:
" virdevmapper: Don't use libdevmapper to obtain dependencies

    When building domain's private /dev in a namespace, libdevmapper was consulted for getting full dependency tree of domain's disks. However, this meant that libdevmapper opened /dev/mapper/control which wasn't closed and was leaked to QEMU. CVE-2020-14339"

Please bump to 6.6.0.
Comment 2 Matthias Maier gentoo-dev 2020-10-01 23:50:34 UTC
commit 21b2340aff308620f996e7de4123908050f92fdd
Author: Jonathan Davies <>
Date:   Sat Sep 26 22:10:34 2020 +0000

    app-emulation/libvirt: Version updated to 6.7.0.
    Signed-off-by: Jonathan Davies <>
    Signed-off-by: Matthias Maier <>
Comment 3 Matthias Maier gentoo-dev 2020-10-01 23:53:37 UTC
Arches, please stabilize libvirt-6.7.0
Comment 4 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-10-05 23:23:10 UTC
amd64 done
Comment 5 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-10-05 23:24:02 UTC
x86 done

all arches done
Comment 6 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-10-05 23:24:56 UTC
Please cleanup. Thanks!
Comment 7 NATTkA bot gentoo-dev 2020-10-05 23:25:40 UTC Comment hidden (obsolete)
Comment 8 Larry the Git Cow gentoo-dev 2020-10-07 15:43:20 UTC
The bug has been referenced in the following commit(s):

commit 63a74aaa80159c39749f74edac9b9c77a766c98b
Author:     Matthias Maier <>
AuthorDate: 2020-10-07 15:42:15 +0000
Commit:     Matthias Maier <>
CommitDate: 2020-10-07 15:42:15 +0000

    app-emulation/libvirt: drop vulnerable
    Package-Manager: Portage-3.0.8, Repoman-3.0.1
    Signed-off-by: Matthias Maier <>

 app-emulation/libvirt/Manifest                     |   2 -
 .../files/libvirt-6.0.0-do-not-use-sysconf.patch   | 150 ---------
 .../libvirt-6.1.0-fix-paths-for-apparmor.patch     |  70 ----
 .../files/libvirt-6.5.0-do-not-use-sysconfig.patch | 245 --------------
 .../libvirt-6.5.0-fix-paths-for-apparmor.patch     |  82 -----
 app-emulation/libvirt/libvirt-6.2.0-r2.ebuild      | 356 ---------------------
 app-emulation/libvirt/libvirt-6.5.0-r1.ebuild      | 355 --------------------
 7 files changed, 1260 deletions(-)
Comment 9 NATTkA bot gentoo-dev 2020-12-25 20:04:58 UTC
Unable to check for sanity:

> no match for package: app-emulation/libvirt-6.7.0
Comment 10 GLSAMaker/CVETool Bot gentoo-dev 2021-01-26 00:22:08 UTC
This issue was resolved and addressed in
 GLSA 202101-22 at
by GLSA coordinator Sam James (sam_c).