NVD / CVE Program· CNA XEN

CVE-2024-31146: PCI device pass-through with shared resources

HighCVSS 7.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 30/100)

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: 0.23% (FIRST EPSS).
Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. Special conditions such as timing or configuration are required.
Fixed version: xen (Debian:12) 4.17.5+23-ga4e5191dc0-1; xen (Debian:13) 4.19.1-1; xen (openSUSE:Leap 15.6) 4.18.3_02-150600.3.6.1.

Low priority for now. Upgrade to xen (Debian:12) 4.17.5+23-ga4e5191dc0-1; xen (Debian:13) 4.19.1-1; xen (openSUSE:Leap 15.6) 4.18.3_02-150600.3.6.1 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

Primary sources: NVD · CVE.org · FIRST EPSS

When multiple devices share resources and one of them is to be passed through to a guest, security of the entire system and of respective guests individually cannot really be guaranteed without knowing internals of any of the involved guests. Therefore such a configuration cannot really be security-supported, yet making that explicit was so far missing. Resources the sharing of which is known to be problematic include, but are not limited to - - PCI Base Address Registers (BARs) of multiple devices mapping to the same page (4k on x86), - - INTx lines.

Denial of service

Published: Sep 25, 2024
Updated: Jun 17, 2026
EPSS: 0.2% · 14th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 30 / 40 · 7.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

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.

Is your version affected? Check it

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.

Vendor	Product	CPE
xen	xen	cpe:2.3:o:xen:xen

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-461unknown

Affected versions

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

xen xenall versions

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	xen	before 4.17.5+23-ga4e5191dc0-1	4.17.5+23-ga4e5191dc0-1
Debian:13	xen	before 4.19.1-1	4.19.1-1
openSUSE:Leap 15.6	xen	before 4.18.3_02-150600.3.6.1	4.18.3_02-150600.3.6.1
openSUSE:Leap Micro 5.5	xen	before 4.17.5_02-150500.3.36.1	4.17.5_02-150500.3.36.1
openSUSE:Tumbleweed	xen	before 4.19.0_02-1.1	4.19.0_02-1.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS	xen	before 4.13.5_14-150200.3.96.1	4.13.5_14-150200.3.96.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS	xen	before 4.14.6_18-150300.3.78.1	4.14.6_18-150300.3.78.1
SUSE:Linux Enterprise Micro 5.3	xen	before 4.16.6_04-150400.4.62.1	4.16.6_04-150400.4.62.1
SUSE:Linux Enterprise Micro 5.5	xen	before 4.17.5_02-150500.3.36.1	4.17.5_02-150500.3.36.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6	xen	before 4.18.3_02-150600.3.6.1	4.18.3_02-150600.3.6.1
SUSE:Linux Enterprise Software Development Kit 12 SP5	xen	before 4.12.4_56-3.121.1	4.12.4_56-3.121.1
SUSE:Linux Enterprise Software Development Kit 12 SP5	xen	before 4.12.4_52-3.115.1	4.12.4_52-3.115.1

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…
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…
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

Published before and after this one in the same product

← EarlierCVE-2024-31143Jul 18, 2024 · double unlock in x86 guest IRQ handling
30Monitor
← EarlierCVE-2024-31145Sep 25, 2024 · error handling in x86 IOMMU identity mapping
30Monitor
Later →CVE-2024-45817Sep 25, 2024 · x86: Deadlock in vlapic_error()
29Monitor

Remediation

Which version to upgrade to

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

Product / package	Fixed version	Source
debian:xen	4.17.5+23-ga4e5191dc0-1 · Debian:12	Package registry (OSV)
opensuse:xen	4.17.5_02-150500.3.36.1 · openSUSE:Leap Micro 5.5	Package registry (OSV)
suse:xen	4.13.5_14-150200.3.96.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS	Package registry (OSV)
suse:xen	4.17.5_02-150500.3.36.1 · SUSE:Linux Enterprise Micro 5.5	Package 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.

Variant candidates

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

CVE-2024-311450 days aparterror handling in x86 IOMMU identity mapping
30Monitor

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

Someone with local access to the system can trigger it.
Administrator privileges are required.
No user action is required.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

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

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

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

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

nvd-secondary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

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

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log (1)

Fix✗ → ✓Sep 28, 2026, 10:47 PM UTC

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

References

xenbits.xenproject.org/xsa/advisory-461.html

Show all references (2 more)

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

All records