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Bug 905389 (CVE-2022-42330, CVE-2022-42335, XSA-425, XSA-430) - <app-emulation/xen-{4.16.4,4.17.1}: multiple vulnerabilities
Summary: <app-emulation/xen-{4.16.4,4.17.1}: multiple vulnerabilities
Alias: CVE-2022-42330, CVE-2022-42335, XSA-425, XSA-430
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal minor (vote)
Assignee: Gentoo Security
Whiteboard: B3 [stable?]
Keywords: PullRequest
Depends on:
Reported: 2023-04-30 22:01 UTC by John Helmert III
Modified: 2023-06-13 04:16 UTC (History)
3 users (show)

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


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Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2023-04-30 22:01:13 UTC
CVE-2022-42330 (

Guests can cause Xenstore crash via soft reset When a guest issues a "Soft Reset" (e.g. for performing a kexec) the libxl based Xen toolstack will normally perform a XS_RELEASE Xenstore operation. Due to a bug in xenstored this can result in a crash of xenstored. Any other use of XS_RELEASE will have the same impact.
Comment 1 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2023-04-30 22:09:34 UTC
CVE-2022-42335 (

x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.
Comment 2 Larry the Git Cow gentoo-dev 2023-05-16 07:33:54 UTC
The bug has been referenced in the following commit(s):

commit a3930320a6720f2b609ee77a5073df1af5ba37a6
Author:     Tomáš Mózes <>
AuthorDate: 2023-05-02 22:25:36 +0000
Commit:     Florian Schmaus <>
CommitDate: 2023-05-16 07:33:51 +0000

    app-emulation/xen: add 4.16.4/4.17.1
    Signed-off-by: Tomáš Mózes <>
    Signed-off-by: Florian Schmaus <>

 app-emulation/xen/Manifest          |   2 +
 app-emulation/xen/xen-4.16.4.ebuild | 174 ++++++++++++++++++++++++++++++++++++
 app-emulation/xen/xen-4.17.1.ebuild | 174 ++++++++++++++++++++++++++++++++++++
 3 files changed, 350 insertions(+)
Comment 3 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2023-06-13 04:16:34 UTC
Apologies for the delay in handling.

Please stabilize when ready.