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CVE-2025-58149

Incorrect removal of permissions on PCI device unplug

7.5 HighFix available

When passing through PCI devices, the detach logic in libxl won't remove access permissions to any 64bit memory BARs the device might have. As a result a domain can still have access any 64bit memory BAR when such device is no longer assigned to the domain.

For PV domains the permission leak allows the domain itself to map the memory in the page-tables. For HVM it would require a compromised device model or stubdomain to map the leaked memory into the HVM domain p2m.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.43%Up 0.4 points since Oct 31, 2025
90%50%10%1%

What each source reports

CVE List Score used 7.5

Incorrect removal of permissions on PCI device unplug

When passing through PCI devices, the detach logic in libxl won't remove access permissions to any 64bit memory BARs the device might have. As a result a domain can still have access any 64bit memory BAR when such device is no longer assigned to the domain.

For PV domains the permission leak allows the domain itself to map the memory in the page-tables. For HVM it would require a compromised device model or stubdomain to map the leaked memory into the HVM domain p2m.

Record
CVE-2025-58149
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-672
Updated
2026-11-02
EUVDEUVD-2025-37346 7.5

When passing through PCI devices, the detach logic in libxl won't remove access permissions to any 64bit memory BARs the device might have. As a result a domain can still have access any 64bit memory BAR when such device is no longer assigned to the domain.

For PV domains the permission leak allows the domain itself to map the memory in the page-tables. For HVM it would require a compromised device model or stubdomain to map the leaked memory into the HVM domain p2m.

Record
EUVD-2025-37346
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-38qg-7h9q-7h29 7.5

When passing through PCI devices, the detach logic in libxl won't remove access permissions to...

When passing through PCI devices, the detach logic in libxl won't remove access permissions to any 64bit memory BARs the device might have. As a result a domain can still have access any 64bit memory BAR when such device is no longer assigned to the domain.

For PV domains the permission leak allows the domain itself to map the memory in the page-tables. For HVM it would require a compromised device model or stubdomain to map the leaked memory into the HVM domain p2m.

Record
GHSA-38qg-7h9q-7h29
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-284, CWE-672
Updated
2026-11-02
NVD 7.5

When passing through PCI devices, the detach logic in libxl won't remove access permissions to any 64bit memory BARs the device might have. As a result a domain can still have access any 64bit memory BAR when such device is no longer assigned to the domain.

For PV domains the permission leak allows the domain itself to map the memory in the page-tables. For HVM it would require a compromised device model or stubdomain to map the leaked memory into the HVM domain p2m.

Record
CVE-2025-58149
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness
CWE-672
Updated
2026-11-02
OSVALPINE-CVE-2025-58149 7.5

When passing through PCI devices, the detach logic in libxl won't remove access permissions to any 64bit memory BARs the device might have. As a result a domain can still have access any 64bit memory BAR when such device is no longer assigned to the domain.

For PV domains the permission leak allows the domain itself to map the memory in the page-tables. For HVM it would require a compromised device model or stubdomain to map the leaked memory into the HVM domain p2m.

Record
ALPINE-CVE-2025-58149
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSV 7.5

When passing through PCI devices, the detach logic in libxl won't remove access permissions to any 64bit memory BARs the device might have. As a result a domain can still have access any 64bit memory BAR when such device is no longer assigned to the domain.

For PV domains the permission leak allows the domain itself to map the memory in the page-tables. For HVM it would require a compromised device model or stubdomain to map the leaked memory into the HVM domain p2m.

Record
CVE-2025-58149
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
Show 10 moreShow less
OSVDEBIAN-CVE-2025-58149 7.5

When passing through PCI devices, the detach logic in libxl won't remove access permissions to any 64bit memory BARs the device might have. As a result a domain can still have access any 64bit memory BAR when such device is no longer assigned to the domain. For PV domains the permission leak allows the domain itself to map the memory in the page-tables. For HVM it would require a compromised device model or stubdomain to map the leaked memory into the HVM domain p2m.

Record
DEBIAN-CVE-2025-58149
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2025-58149 7.5

When passing through PCI devices, the detach logic in libxl won't remove access permissions to any 64bit memory BARs the device might have. As a result a domain can still have access any 64bit memory BAR when such device is no longer assigned to the domain. For PV domains the permission leak allows the domain itself to map the memory in the page-tables. For HVM it would require a compromised device model or stubdomain to map the leaked memory into the HVM domain p2m.

Record
UBUNTU-CVE-2025-58149
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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-2025:15719-1 No score

xen-4.20.1_08-1.1 on GA media

These are all security issues fixed in the xen-4.20.1_08-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2025:15719-1
Updated
2026-11-02
OSVSUSE-SU-2025:4419-1 No score

Security update for xen

This update for xen fixes the following issues:

Update to Xen 4.20.2 (jsc#PED-8907).

Security issues fixed:

  • CVE-2025-58149: incorrect removal of permissions on PCI device unplug allows PV guests to access memory of devices no longer assigned to it (XSA-476, bsc#1252692).

Other issues fixed:

  • Failure to restart xenstored (bsc#1254180).
Record
SUSE-SU-2025:4419-1
Updated
2026-11-02
OSVSUSE-SU-2025:4490-1 No score

Security update for xen

This update for xen fixes the following issues:

Update to Xen 4.17.6.

Security issues fixed:

  • CVE-2025-58149: incorrect removal of permissions on PCI device unplug allows PV guests to access memory of devices no longer assigned to them (bsc#1252692).

Other issues fixed:

  • Several upstream bug fixes (bsc#1027519).
  • Failure to restart xenstored (bsc#1254180).
Record
SUSE-SU-2025:4490-1
Updated
2026-11-02
OSVSUSE-SU-2026:0012-1 No score

Security update for xen

This update for xen fixes the following issues:

Security issues fixed:

  • CVE-2025-27466: NULL pointer dereference in the Viridian interface when updating the reference TSC area (bsc#1248807).
  • CVE-2025-58142: NULL pointer dereference in the Viridian interface due to assumption that the SIM page is mapped when a synthetic timer message has to be delivered (bsc#1248807).
  • CVE-2025-58143: information leak and reference counter underflow in the Viridian interface due to race in the mapping of the reference TSC page (bsc#1248807).
  • CVE-2025-58147: incorrect input sanitisation in Viridian hypercalls using the HV_VP_SET Sparse format can lead to out-of-bounds write through vpmask_set() (bsc#1251271).
  • CVE-2025-58148: incorrect input sanitisation in Viridian hypercalls using any input format can lead to out-of-bounds read through send_ipi() (bsc#1251271).
  • CVE-2025-58149: incorrect removal of permissions on PCI device unplug allows PV guests to access memory of devices no longer assigned to them (bsc#1252692).

Other issues fixed:

  • Several upstream bug fixes (bsc#1027519).
  • Failure to restart xenstored (bsc#1254180).
Record
SUSE-SU-2026:0012-1
Updated
2026-11-02
OSVSUSE-SU-2026:0303-1 No score

Security update for xen

This update for xen fixes the following issues:

Security fixes:

  • CVE-2025-58150: Fixed buffer overrun with shadow paging and tracing (XSA-477) (bsc#1256745)
  • CVE-2026-23553: Fixed incomplete IBPB for vCPU isolation (XSA-479) (bsc#1256747)
  • CVE-2025-58149: Fixed incorrect removal od permissions on PCI device unplug allow PV guests to access memory of devices no longer assigned to it (XSA-476) (bsc#1252692)
  • CVE-2025-27466, CVE-2025-58142, CVE-2025-58143: Fixed multiple vulnerabilities in the Viridian interface (XSA-472) (bsc#1248807)

Other fixes:

  • Fixed virtxend service restart. Caused by a failure to start xenstored (bsc#1254180)
Record
SUSE-SU-2026:0303-1
Updated
2026-11-02
OSVSUSE-SU-2026:0328-1 No score

Security update for xen

This update for xen fixes the following issues:

Security fixes:

  • CVE-2025-58150: Fixed buffer overrun with shadow paging and tracing (XSA-477) (bsc#1256745)
  • CVE-2026-23553: Fixed incomplete IBPB for vCPU isolation (XSA-479) (bsc#1256747)
  • CVE-2025-58149: Fixed incorrect removal od permissions on PCI device unplug allow PV guests to access memory of devices no longer assigned to it (XSA-476) (bsc#1252692)
Record
SUSE-SU-2026:0328-1
Updated
2026-11-02
OSVSUSE-SU-2026:0394-1 No score

Security update for xen

This update for xen fixes the following issues:

Security fixes:

  • CVE-2025-58150: Fixed buffer overrun with shadow paging and tracing (XSA-477) (bsc#1256745)
  • CVE-2026-23553: Fixed incomplete IBPB for vCPU isolation (XSA-479) (bsc#1256747)
  • CVE-2025-58149: Fixed incorrect removal od permissions on PCI device unplug allow PV guests to access memory of devices no longer assigned to it (XSA-476) (bsc#1252692)

Other fixes:

  • Fixed virtxend service restart. Caused by a failure to start xenstored (bsc#1254180)
Record
SUSE-SU-2026:0394-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xen
Alpine:v3.19
 4.0.0 up to 4.18.5-r3
4.18.5-r3
xen
Alpine:v3.20
 4.0.0 up to 4.18.5-r3
4.18.5-r3
xen
Alpine:v3.21
 4.0.0 up to 4.19.3-r2
4.19.3-r2
xen
Alpine:v3.22
 4.0.0 up to 4.20.1-r2
4.20.1-r2
xen
Alpine:v3.23
 4.0.0 up to 4.20.1-r2
4.20.1-r2
xen
Alpine:v3.24
 4.0.0 up to 4.20.1-r2
4.20.1-r2
xen
Debian:12
 before 4.17.5+72-g01140da4e8-1, 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 8 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-g54dacb5c02-14.17.5+23-ga4e5191dc0-14.17.5+23-ga4e5191dc0-1+deb12u1
4.17.5+72-g01140da4e8-1
xen
Debian:13
 before 4.20.2+7-g1badcf5035-0+deb13u1, plus listed versions
4.20.0+68-g35cb38b222-1
4.20.2+7-g1badcf5035-0+deb13u1
xen
Debian:14
 before 4.20.2+7-g1badcf5035-1, plus listed versions
4.20.0+68-g35cb38b222-1
4.20.2+7-g1badcf5035-1
xen
Mageia:9
 before 4.17.5-1.git20251028.1.mga9
4.17.5-1.git20251028.1.mga9
Show 21 moreShow less
Affected packages
PackageAffectedFixed
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP7
 before 4.20.2_02-150700.3.19.1
4.20.2_02-150700.3.19.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP7
 before 4.20.2_02-150700.3.19.1
4.20.2_02-150700.3.19.1
xen
SUSE:Linux Enterprise Micro 5.5
 before 4.17.6_02-150500.3.56.1
4.17.6_02-150500.3.56.1
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP6
 before 4.18.5_08-150600.3.34.2
4.18.5_08-150600.3.34.2
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP6
 before 4.18.5_08-150600.3.34.2
4.18.5_08-150600.3.34.2
xen
SUSE:Linux Enterprise Server 15 SP6-LTSS
 before 4.18.5_08-150600.3.34.2
4.18.5_08-150600.3.34.2
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP6
 before 4.18.5_08-150600.3.34.2
4.18.5_08-150600.3.34.2
xen
openSUSE:Leap 15.6
 before 4.18.5_08-150600.3.34.2
4.18.5_08-150600.3.34.2
xen
SUSE:Linux Enterprise Micro 5.2
 before 4.14.6_28-150300.3.94.1
4.14.6_28-150300.3.94.1
xen
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5
 before 4.12.4_64-3.137.1
4.12.4_64-3.137.1
xen
SUSE:Linux Enterprise Micro 5.3
 before 4.16.7_06-150400.4.78.1
4.16.7_06-150400.4.78.1
xen
SUSE:Linux Enterprise Micro 5.4
 before 4.16.7_06-150400.4.78.1
4.16.7_06-150400.4.78.1
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 4.20.1_08-1.1
4.20.1_08-1.1

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2025-58149 is a high vulnerability (CVSS 7.5) in Xen, published October 31, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.43%, the 37th percentile. Fixed in xen 4.18.5-r3.

References

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