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CVE-2022-42335

x86 shadow paging arbitrary pointer dereference In environments where host assisted address...

7.8 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.26%Up 0.2 points since Apr 26, 2023
90%50%10%1%

What each source reports

NVD Score used 7.8

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.

Record
CVE-2022-42335
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-476
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2022-42335
Updated
2026-11-02
EUVDEUVD-2022-45410 No score

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.

Record
EUVD-2022-45410
Updated
2026-11-03
GitHub AdvisoriesGHSA-pwx9-2gvj-242v 7.8

x86 shadow paging arbitrary pointer dereference In environments where host assisted address...

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.

Record
GHSA-pwx9-2gvj-242v
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-476
Updated
2026-11-02
OSVALPINE-CVE-2022-42335 7.8

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.

Record
ALPINE-CVE-2022-42335
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
OSV 7.8

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.

Record
CVE-2022-42335
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVDEBIAN-CVE-2022-42335 7.8

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.

Record
DEBIAN-CVE-2022-42335
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-03
OSVUBUNTU-CVE-2022-42335 7.8

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.

Record
UBUNTU-CVE-2022-42335
CVSS 3.1
7.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2024:12917-1 No score

xen-4.17.1_02-1.1 on GA media

These are all security issues fixed in the xen-4.17.1_02-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:12917-1
Updated
2026-11-02
OSVSUSE-SU-2023:2535-1 No score

Security update for xen

This update for xen fixes the following issues:

Security fixes:

  • CVE-2022-42336: Fix an issue where guests configuring AMD Speculative Store Bypass Disable would have no effect (XSA-431) (bsc#1211433).
  • CVE-2022-42335: Fixed an issue where guests running under shadow mode with a PCI devices passed through could force the hypervisor to dereference arbitrary memory, leading to a denial of service (XSA-430) (bsc#1210315).

Non-security fixes:

  • Fixed a build warning false positive (bsc#1210570).
  • Added missing debug-info to xen-syms (bsc#1209237).
  • Updated to version 4.17.1 (bsc#1027519).
  • Fixed a failure during VM destruction when using host-assisted kexec and kdump (bsc#1209245).
  • Other upstream fixes (bsc#1027519).
Record
SUSE-SU-2023:2535-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xen
Alpine:v3.18
 before 4.17.0-r5
4.17.0-r5
xen
Alpine:v3.19
 before 4.17.0-r5
4.17.0-r5
xen
Alpine:v3.20
 before 4.17.0-r5
4.17.0-r5
xen
Alpine:v3.21
 before 4.17.0-r5
4.17.0-r5
xen
Alpine:v3.22
 before 4.17.0-r5
4.17.0-r5
xen
Alpine:v3.23
 before 4.17.0-r5
4.17.0-r5
xen
Alpine:v3.24
 before 4.17.0-r5
4.17.0-r5
xen
Debian:12
 before 4.17.1+2-gb773c48e36-1
4.17.1+2-gb773c48e36-1
xen
Debian:13
 before 4.17.1+2-gb773c48e36-1
4.17.1+2-gb773c48e36-1
xen
Debian:14
 before 4.17.1+2-gb773c48e36-1
4.17.1+2-gb773c48e36-1
Show 12 moreShow less
Affected packages
PackageAffectedFixed
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP5
From an advisory covering 2 CVEs
 before 4.17.1_04-150500.3.3.1
4.17.1_04-150500.3.3.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP5
From an advisory covering 2 CVEs
 before 4.17.1_04-150500.3.3.1
4.17.1_04-150500.3.3.1
xen
openSUSE:Leap 15.5
From an advisory covering 2 CVEs
 before 4.17.1_04-150500.3.3.1
4.17.1_04-150500.3.3.1
xen
Ubuntu:16.04:LTS
 All versions, plus listed versions
4.5.1-0ubuntu14.5.1-0ubuntu24.6.0-1ubuntu14.6.0-1ubuntu24.6.0-1ubuntu4
Show 7 moreShow less
4.6.0-1ubuntu4.14.6.0-1ubuntu4.24.6.0-1ubuntu4.34.6.5-0ubuntu14.6.5-0ubuntu1.14.6.5-0ubuntu1.24.6.5-0ubuntu1.4
 None known
xen
Ubuntu:18.04:LTS
 All versions, plus listed versions
4.9.0-0ubuntu34.9.0-0ubuntu44.9.2-0ubuntu1
 None known
xen
Ubuntu:20.04:LTS
 All versions, plus listed versions
4.9.2-0ubuntu24.9.2-0ubuntu64.9.2-0ubuntu74.11.3+24-g14b62ab3e5-1ubuntu14.11.3+24-g14b62ab3e5-1ubuntu24.11.3+24-g14b62ab3e5-1ubuntu2.24.11.3+24-g14b62ab3e5-1ubuntu2.3
 None known
xen
Ubuntu:22.04:LTS
 All versions, plus listed versions
4.11.4+24-gddaaccbbab-1ubuntu24.16.0-1~ubuntu24.16.0-1~ubuntu2.1
 None known
xen
Ubuntu:24.04:LTS
 All versions, plus listed versions
4.17.2-14.17.2+55-g0b56bed864-14.17.2+76-ge1f9cb16e2-14.17.2+76-ge1f9cb16e2-1ubuntu14.17.3+10-g091466ba55-14.17.3+10-g091466ba55-1.1ubuntu24.17.3+10-g091466ba55-1.1ubuntu3
 None known
xen
Ubuntu:25.10
 All versions, plus listed versions
4.20.0-1ubuntu14.20.0+68-g35cb38b222-1
 None known
xen
Ubuntu:26.10
 All versions, plus listed versions
4.20.2+7-g1badcf5035-2build24.20.2+37-g61ff35323e-1ubuntu14.20.3+127-gc42374a105-1
 None known
xen
Ubuntu:26.04:LTS
 All versions, plus listed versions
4.20.0+68-g35cb38b222-14.20.2+7-g1badcf5035-24.20.2+7-g1badcf5035-2build2
 None known
xen
openSUSE:Tumbleweed
 before 4.17.1_02-1.1
4.17.1_02-1.1

History

History
RecordedChangedSources
affected, factsOSV
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-42335 is a high vulnerability (CVSS 7.8) in Xen, published April 25, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 18th percentile. Fixed in xen 4.17.0-r5.

References

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