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CVE-2022-33748· NVD / CVE Program· CNA XEN

lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path.

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.27% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: xen (Alpine:v3.14) 4.15.4-r0; xen (Alpine:v3.16) 4.16.3-r0; xen (Alpine:v3.18) 4.17.0-r0.

Low priority for now. Upgrade to xen (Alpine:v3.14) 4.15.4-r0; xen (Alpine:v3.16) 4.16.3-r0; xen (Alpine:v3.18) 4.17.0-r0 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path. While doing so, locking requirements were not paid attention to. As a result two cooperating guests granting each other transitive grants can cause locks to be acquired nested within one another, but in respectively opposite order. With suitable timing between the involved grant copy operations this may result in the locking up of a CPU.

MediumCVSS 5.6 · v3.1—No exploit Fix available
Published
Oct 11, 2022
Updated
Jun 17, 2026
EPSS
0.3% · 18th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.6 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-33748

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
xenxen
fedoraprojectfedora
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux11.0
  • fedoraproject fedora35
  • fedoraproject fedora36
  • fedoraproject fedora37
  • xen xen4.0 and later

Versions reported by the vendor

Affected version ranges reported by the assigning authority (XEN). Independent of NVD's CPE analysis and usually ahead of it.

  • Xen xen

    • consult Xen advisory XSA-411unknown

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.14xenfrom 4.0 · before 4.15.4-r04.15.4-r0
Alpine:v3.16xenfrom 4.0 · before 4.16.3-r04.16.3-r0
Alpine:v3.18xenfrom 4.0 · before 4.17.0-r04.17.0-r0
Debian:11xenbefore 4.14.5+86-g1c354767d5-14.14.5+86-g1c354767d5-1
Debian:12xenbefore 4.16.2+90-g0d39a6d1ae-14.16.2+90-g0d39a6d1ae-1
openSUSE:Tumbleweedxenbefore 4.17.0_02-1.14.17.0_02-1.1
SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOSxenbefore 4.12.4_30-150100.3.80.14.12.4_30-150100.3.80.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-ESPOSxenbefore 4.13.4_16-150200.3.65.14.13.4_16-150200.3.65.1
SUSE:Linux Enterprise High Performance Computing 15-ESPOSxenbefore 4.10.4_40-150000.3.84.14.10.4_40-150000.3.84.1
SUSE:Linux Enterprise Micro 5.3xenbefore 4.16.2_08-150400.4.16.14.16.2_08-150400.4.16.1
SUSE:Linux Enterprise Micro 5.3xenbefore 4.16.2_08-150400.4.16.14.16.2_08-150400.4.16.1
SUSE:Linux Enterprise Micro 5.3xenbefore 4.16.2_06-150400.4.11.14.16.2_06-150400.4.11.1
SUSE:Linux Enterprise Micro 5.3xenbefore 4.16.2_06-150400.4.11.14.16.2_06-150400.4.11.1
SUSE:Linux Enterprise Module for Basesystem 15 SP3xenbefore 4.14.5_06-150300.3.35.14.14.5_06-150300.3.35.1
SUSE:Linux Enterprise Module for Basesystem 15 SP3xenbefore 4.14.5_08-150300.3.40.14.14.5_08-150300.3.40.1
SUSE:Linux Enterprise Module for Basesystem 15 SP3xenbefore 4.14.5_06-150300.3.35.14.14.5_06-150300.3.35.1
SUSE:Linux Enterprise Module for Basesystem 15 SP3xenbefore 4.14.5_08-150300.3.40.14.14.5_08-150300.3.40.1
SUSE:Linux Enterprise Server 12 SP2-BCLxenbefore 4.7.6_28-43.98.14.7.6_28-43.98.1
SUSE:Linux Enterprise Software Development Kit 12 SP5xenbefore 4.12.4_28-3.77.14.12.4_28-3.77.1
SUSE:OpenStack Cloud 9xenbefore 4.11.4_34-2.83.14.11.4_34-2.83.1

Same product

xen: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-10921The grant-table feature in Xen through 4.8.x does not ensure sufficient type counts for a GNTMAP_device_map and GNTMAP_host_map mapping, whi
    41Plan
  • CVE-2017-10920The grant-table feature in Xen through 4.8.x mishandles a GNTMAP_device_map and GNTMAP_host_map mapping, when followed by only a GNTMAP_host
    41Plan
  • CVE-2017-10918Xen through 4.8.x does not validate memory allocations during certain P2M operations, which allows guest OS users to obtain privileged host
    41Plan
  • CVE-2017-10912Xen through 4.8.x mishandles page transfer, which allows guest OS users to obtain privileged host OS access, aka XSA-217.
    41Plan
  • CVE-2015-8104The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a denial of service (host O
    41Plan
  • CVE-2015-5165The C+ mode offload emulation in the RTL8139 network card device model in QEMU, as used in Xen 4.5.x and earlier, allows remote attackers to
    41Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:xen4.15.4-r0 · Alpine:v3.14Package registry (OSV)
debian:xen4.16.2+90-g0d39a6d1ae-1 · Debian:12Package registry (OSV)
opensuse:xen4.14.5_06-150300.3.35.1 · openSUSE:Leap Micro 5.2Package registry (OSV)
suse:xen4.14.5_06-150300.3.35.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-755 · Improper Handling of Exceptional Conditions

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records