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CVE-2024-31146

PCI device pass-through with shared resources

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
High
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.24%Up 0.2 points since Sep 26, 2024
90%50%10%1%

What each source reports

CVE List Score used 7.5

PCI device pass-through with shared resources

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.
Record
CVE-2024-31146
CVSS 3.1
7.5 HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-400
Updated
2026-11-02
EUVDEUVD-2024-29056 7.5

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.
Record
EUVD-2024-29056
CVSS 3.1
7.5 HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-hrw6-9556-27w2 7.5

When multiple devices share resources and one of them is to be passed through to a guest,...

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.
Record
GHSA-hrw6-9556-27w2
CVSS 3.1
7.5 HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-400
Updated
2026-11-02
NVD 7.5

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.
Record
CVE-2024-31146
CVSS 3.1
7.5 HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-400
Updated
2026-11-02
OSVDEBIAN-CVE-2024-31146 7.5

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.

Record
DEBIAN-CVE-2024-31146
CVSS 3.1
7.5 HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2024-31146 7.5

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.

Record
UBUNTU-CVE-2024-31146
CVSS 3.1
7.5 HighCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
Show 10 moreShow less
OSV No score

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.
Record
CVE-2024-31146
Updated
2026-11-02
OSVMGASA-2025-0270 No score

Updated xen packages fix security vulnerabilities

Double unlock in x86 guest IRQ handling. (CVE-2024-31143) Xapi: Metadata injection attack against backup/restore functionality. (CVE-2024-31144) Error handling in x86 IOMMU identity mapping. (CVE-2024-31145) PCI device pass-through with shared resources. (CVE-2024-31146) x86: Deadlock in vlapic_error(). (CVE-2024-45817) Deadlock in x86 HVM standard VGA handling. (CVE-2024-45818) libxl leaks data to PVH guests via ACPI tables. (CVE-2024-45819) Backend can crash Linux netfront. (CVE-2024-53240) Xen hypercall page unsafe against speculative attacks. (CVE-2024-53241) Deadlock potential with VT-d and legacy PCI device pass-through. (CVE-2025-1713) x86: Indirect Target Selection. (CVE-2024-28956) x86: Incorrect stubs exception handling for flags recovery. (CVE-2025-27465) TSA-SQ (TSA in the Store Queues). (CVE-2024-36350) TSA-L1 (TSA in the L1 data cache). (CVE-2024-36357) A NULL pointer dereference in the updating of the reference TSC area. (CVE-2025-27466) A NULL pointer dereference by assuming the SIM page is mapped when a synthetic timer message has to be delivered. (CVE-2025-58142) A race in the mapping of the reference TSC page, where a guest can get Xen to free a page while still present in the guest physical to machine (p2m) page tables. (CVE-2025-58143) An assertion is wrong there, where the case actually needs handling. A NULL pointer de-reference could result on a release build. (CVE-2025-58144) The P2M lock isn't held until a page reference was actually obtained (or the attempt to do so has failed). Otherwise the page can not only change type, but even ownership in between, thus allowing domain boundaries to be violated. (CVE-2025-58145) XAPI UTF-8 string handling. (CVE-2025-58146) Hypercalls using the HV_VP_SET Sparse format can cause vpmask_set() to write out of bounds when converting the bitmap to Xen's format. (CVE-2025-58147) Hypercalls using any input format can cause send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild vCPU pointer.(CVE-2025-58148) Incorrect removal of permissions on PCI device unplug. (CVE-2025-58149)

Record
MGASA-2025-0270
Updated
2026-11-02
OSVopenSUSE-SU-2024:14283-1 No score

xen-4.19.0_02-1.1 on GA media

These are all security issues fixed in the xen-4.19.0_02-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:14283-1
Updated
2026-11-02
OSVSUSE-SU-2024:2994-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2024-31145: Fixed error handling in x86 IOMMU identity mapping (XSA-460, bsc#1228574)
  • CVE-2024-31146: Fixed PCI device pass-through with shared resources (XSA-461, bsc#1228575)
Record
SUSE-SU-2024:2994-1
Updated
2026-11-02
OSVSUSE-SU-2024:3001-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2024-31145: Fixed error handling in x86 IOMMU identity mapping (XSA-460, bsc#1228574)
  • CVE-2024-31146: Fixed PCI device pass-through with shared resources (XSA-461, bsc#1228575)
Record
SUSE-SU-2024:3001-1
Updated
2026-11-02
OSVSUSE-SU-2024:3010-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2024-31145: Fixed error handling in x86 IOMMU identity mapping (XSA-460, bsc#1228574)
  • CVE-2024-31146: Fixed PCI device pass-through with shared resources (XSA-461, bsc#1228575)

Other fixes:

  • Migrate CVE-2024-31143 patch in favor of upstream version (bsc#1227355)
  • Upstream bug fixes (bsc#1027519)
Record
SUSE-SU-2024:3010-1
Updated
2026-11-02
OSVSUSE-SU-2024:3075-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2024-31145: Fixed error handling in x86 IOMMU identity mapping (XSA-460, bsc#1228574)
  • CVE-2024-31146: Fixed PCI device pass-through with shared resources (XSA-461, bsc#1228575)

Other fixes:

  • Update to Xen 4.17.5 security bug fix release (bsc#1027519)
Record
SUSE-SU-2024:3075-1
Updated
2026-11-02
OSVSUSE-SU-2024:3113-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2024-31145: Fixed error handling in x86 IOMMU identity mapping (XSA-460, bsc#1228574)
  • CVE-2024-31146: Fixed PCI device pass-through with shared resources (XSA-461, bsc#1228575)

Other fixes:

  • Update to Xen 4.18.3 security bug fix release (bsc#1027519)
Record
SUSE-SU-2024:3113-1
Updated
2026-11-02
OSVSUSE-SU-2024:3423-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2024-2201: Mitigation for Native Branch History Injection (XSA-456, bsc#1222453)
  • CVE-2024-31143: Fixed double unlock in x86 guest IRQ handling (XSA-458, bsc#1227355)
  • CVE-2024-31145: Fixed error handling in x86 IOMMU identity mapping (XSA-460, bsc#1228574)
  • CVE-2024-31146: Fixed PCI device pass-through with shared resources (XSA-461, bsc#1228575)
  • CVE-2024-45817: Fixed a deadlock in vlapic_error (XSA-462, bsc#1230366)
Record
SUSE-SU-2024:3423-1
Updated
2026-11-02
OSVSUSE-SU-2024:3586-1 No score

Security update for xen

This update for xen fixes the following issues:

Security fixes:

  • CVE-2024-31145: Fixed error handling in x86 IOMMU identity mapping (XSA-460) (bsc#1228574)
  • CVE-2024-31146: Fixed PCI device pass-through with shared resources (XSA-461) (bsc#1228575)
  • CVE-2024-45817: Fixed Deadlock in vlapic_error() (XSA-462) (bsc#1230366)

Other fixes:

  • Upstream bug fixes (bsc#1027519)
Record
SUSE-SU-2024:3586-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xen
Debian:12
 before 4.17.5+23-ga4e5191dc0-1, plus listed versions
4.17.1+2-gb773c48e36-14.17.2+55-g0b56bed864-14.17.2+76-ge1f9cb16e2-14.17.2+76-ge1f9cb16e2-1~deb12u14.17.2-1
Show 6 moreShow less
4.17.3+10-g091466ba55-14.17.3+10-g091466ba55-1.14.17.3+10-g091466ba55-1.1~exp14.17.3+10-g091466ba55-1.1~exp24.17.3+10-g091466ba55-1~deb12u14.17.3+36-g54dacb5c02-1
4.17.5+23-ga4e5191dc0-1
xen
Debian:13
 before 4.19.1-1
4.19.1-1
xen
Debian:14
 before 4.19.1-1
4.19.1-1
xen
Debian:12
From an advisory covering 12 CVEs
 before 4.17.5+23-ga4e5191dc0-1, plus listed versions
4.17.1+2-gb773c48e36-14.17.2+55-g0b56bed864-14.17.2+76-ge1f9cb16e2-14.17.2+76-ge1f9cb16e2-1~deb12u14.17.2-1
Show 6 moreShow less
4.17.3+10-g091466ba55-14.17.3+10-g091466ba55-1.14.17.3+10-g091466ba55-1.1~exp14.17.3+10-g091466ba55-1.1~exp24.17.3+10-g091466ba55-1~deb12u14.17.3+36-g54dacb5c02-1
4.17.5+23-ga4e5191dc0-1
xen
Mageia:9
From an advisory covering 26 CVEs
 before 4.17.5-1.git20251028.1.mga9
4.17.5-1.git20251028.1.mga9
xen
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS
From an advisory covering 2 CVEs
 before 4.13.5_14-150200.3.96.1
4.13.5_14-150200.3.96.1
xen
SUSE:Linux Enterprise Server 15 SP2-LTSS
From an advisory covering 2 CVEs
 before 4.13.5_14-150200.3.96.1
4.13.5_14-150200.3.96.1
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP2
From an advisory covering 2 CVEs
 before 4.13.5_14-150200.3.96.1
4.13.5_14-150200.3.96.1
xen
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS
From an advisory covering 2 CVEs
 before 4.14.6_18-150300.3.78.1
4.14.6_18-150300.3.78.1
xen
SUSE:Linux Enterprise Server 15 SP3-LTSS
From an advisory covering 2 CVEs
 before 4.14.6_18-150300.3.78.1
4.14.6_18-150300.3.78.1
Show 35 moreShow less
Affected packages
PackageAffectedFixed
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP3
From an advisory covering 2 CVEs
 before 4.14.6_18-150300.3.78.1
4.14.6_18-150300.3.78.1
xen
SUSE:Linux Enterprise Micro 5.1
From an advisory covering 2 CVEs
 before 4.14.6_18-150300.3.78.1
4.14.6_18-150300.3.78.1
xen
SUSE:Linux Enterprise Micro 5.2
From an advisory covering 2 CVEs
 before 4.14.6_18-150300.3.78.1
4.14.6_18-150300.3.78.1
xen
SUSE:Enterprise Storage 7.1
From an advisory covering 2 CVEs
 before 4.14.6_18-150300.3.78.1
4.14.6_18-150300.3.78.1
xen
SUSE:Linux Enterprise Software Development Kit 12 SP5
From an advisory covering 2 CVEs
 before 4.12.4_52-3.115.1
4.12.4_52-3.115.1
xen
SUSE:Linux Enterprise Server 12 SP5
From an advisory covering 2 CVEs
 before 4.12.4_52-3.115.1
4.12.4_52-3.115.1
xen
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
From an advisory covering 2 CVEs
 before 4.12.4_52-3.115.1
4.12.4_52-3.115.1
xen
SUSE:Linux Enterprise Micro 5.5
From an advisory covering 2 CVEs
 before 4.17.5_02-150500.3.36.1
4.17.5_02-150500.3.36.1
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP5
From an advisory covering 2 CVEs
 before 4.17.5_02-150500.3.36.1
4.17.5_02-150500.3.36.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP5
From an advisory covering 2 CVEs
 before 4.17.5_02-150500.3.36.1
4.17.5_02-150500.3.36.1
xen
openSUSE:Leap Micro 5.5
From an advisory covering 2 CVEs
 before 4.17.5_02-150500.3.36.1
4.17.5_02-150500.3.36.1
xen
openSUSE:Leap 15.5
From an advisory covering 2 CVEs
 before 4.17.5_02-150500.3.36.1
4.17.5_02-150500.3.36.1
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP6
From an advisory covering 2 CVEs
 before 4.18.3_02-150600.3.6.1
4.18.3_02-150600.3.6.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP6
From an advisory covering 2 CVEs
 before 4.18.3_02-150600.3.6.1
4.18.3_02-150600.3.6.1
xen
openSUSE:Leap 15.6
From an advisory covering 2 CVEs
 before 4.18.3_02-150600.3.6.1
4.18.3_02-150600.3.6.1
xen
SUSE:Linux Enterprise Micro 5.3
From an advisory covering 5 CVEs
 before 4.16.6_04-150400.4.62.1
4.16.6_04-150400.4.62.1
xen
SUSE:Linux Enterprise Micro 5.4
From an advisory covering 5 CVEs
 before 4.16.6_04-150400.4.62.1
4.16.6_04-150400.4.62.1
xen
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS
From an advisory covering 5 CVEs
 before 4.16.6_04-150400.4.62.1
4.16.6_04-150400.4.62.1
xen
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS
From an advisory covering 5 CVEs
 before 4.16.6_04-150400.4.62.1
4.16.6_04-150400.4.62.1
xen
SUSE:Linux Enterprise Server 15 SP4-LTSS
From an advisory covering 5 CVEs
 before 4.16.6_04-150400.4.62.1
4.16.6_04-150400.4.62.1
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP4
From an advisory covering 5 CVEs
 before 4.16.6_04-150400.4.62.1
4.16.6_04-150400.4.62.1
xen
SUSE:Manager Proxy 4.3
From an advisory covering 5 CVEs
 before 4.16.6_04-150400.4.62.1
4.16.6_04-150400.4.62.1
xen
SUSE:Manager Server 4.3
From an advisory covering 5 CVEs
 before 4.16.6_04-150400.4.62.1
4.16.6_04-150400.4.62.1
xen
SUSE:Linux Enterprise Software Development Kit 12 SP5
From an advisory covering 3 CVEs
 before 4.12.4_56-3.121.1
4.12.4_56-3.121.1
xen
SUSE:Linux Enterprise Server 12 SP5
From an advisory covering 3 CVEs
 before 4.12.4_56-3.121.1
4.12.4_56-3.121.1
xen
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
From an advisory covering 3 CVEs
 before 4.12.4_56-3.121.1
4.12.4_56-3.121.1
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
From an advisory covering 2 CVEs
 before 4.19.0_02-1.1
4.19.0_02-1.1

History

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

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

In short

CVE-2024-31146 is a high vulnerability (CVSS 7.5) in Xen, published August 20, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 14th percentile. Fixed in xen 4.17.5+23-ga4e5191dc0-1.

References

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