Search criteria
1729 vulnerabilities found for Xen by XEN
CVE-2026-23553 (GCVE-0-2026-23553)
Vulnerability from nvd – Published: 2026-01-28 15:33 – Updated: 2026-01-28 16:41
VLAI?
Title
x86: incomplete IBPB for vCPU isolation
Summary
In the context switch logic Xen attempts to skip an IBPB in the case of
a vCPU returning to a CPU on which it was the previous vCPU to run.
While safe for Xen's isolation between vCPUs, this prevents the guest
kernel correctly isolating between tasks. Consider:
1) vCPU runs on CPU A, running task 1.
2) vCPU moves to CPU B, idle gets scheduled on A. Xen skips IBPB.
3) On CPU B, guest kernel switches from task 1 to 2, issuing IBPB.
4) vCPU moves back to CPU A. Xen skips IBPB again.
Now, task 2 is running on CPU A with task 1's training still in the BTB.
Severity ?
Assigner
References
Credits
This issue was discovered by David Kaplan of AMD.
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"description": "CWE-693 Protection Mechanism Failure",
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
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"value": "Xen versions which had the XSA-254 fixes backported are vulnerable.\nUpstream, that is 4.6 and newer.\n\nOnly x86 systems are vulnerable. Arm systems are not vulerable.\n\nSystems vulnerable to SRSO (see XSA-434) with default settings use\nIBPB-on-entry to protect against SRSO. This is a rather more aggressive\nform of flushing than only on context switch, and is believed to be\nsufficient to avoid the vulnerability."
}
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"descriptions": [
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"lang": "en",
"value": "In the context switch logic Xen attempts to skip an IBPB in the case of\na vCPU returning to a CPU on which it was the previous vCPU to run.\nWhile safe for Xen\u0027s isolation between vCPUs, this prevents the guest\nkernel correctly isolating between tasks. Consider:\n\n 1) vCPU runs on CPU A, running task 1.\n 2) vCPU moves to CPU B, idle gets scheduled on A. Xen skips IBPB.\n 3) On CPU B, guest kernel switches from task 1 to 2, issuing IBPB.\n 4) vCPU moves back to CPU A. Xen skips IBPB again.\n\nNow, task 2 is running on CPU A with task 1\u0027s training still in the BTB."
}
],
"impacts": [
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"descriptions": [
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"lang": "en",
"value": "Guest processes may leverage information leaks to obtain information\nintended to be private to other entities in a guest."
}
]
}
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}
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"title": "x86: incomplete IBPB for vCPU isolation",
"workarounds": [
{
"lang": "en",
"value": "Using \"spec-ctrl=ibpb-entry=hvm,ibpb-entry=pv\" on the Xen command line\nwill activate the SRSO mitigation on non-SRSO-vulnerable hardware, but\nit is a large overhead."
}
]
}
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CVE-2025-58150 (GCVE-0-2025-58150)
Vulnerability from nvd – Published: 2026-01-28 15:33 – Updated: 2026-01-28 16:46
VLAI?
Title
x86: buffer overrun with shadow paging + tracing
Summary
Shadow mode tracing code uses a set of per-CPU variables to avoid
cumbersome parameter passing. Some of these variables are written to
with guest controlled data, of guest controllable size. That size can
be larger than the variable, and bounding of the writes was missing.
Severity ?
8.8 (High)
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
Credits
This issue was discovered by Jan Beulich of SUSE.
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}
]
}
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"value": "Running HVM guests in HAP mode only will avoid the vulnerability.\n\nNot enabling tracing will also avoid the vulnerability. Tracing is\nenabled by the \"tbuf_size=\" command line option, or by running tools\nlike xentrace or xenbaked in Dom0. Note that on a running system\nstopping xentrace / xenbaked would disable tracing. For xentrace,\nhowever, this additionally requires that it wasn\u0027t started with the -x\noption. Stopping previously enabled tracing can of course only prevent\nfuture damage; prior damage may have occurred and may manifest only\nlater."
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CVE-2025-58149 (GCVE-0-2025-58149)
Vulnerability from nvd – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI?
Title
Incorrect removal of permissions on PCI device unplug
Summary
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.
Severity ?
7.5 (High)
CWE
- CWE-672 - Operation on a Resource after Expiration or Release
Assigner
References
Credits
This issue was discovered by Jiqian Chen of AMD and diagnosed as a
security issue by Roger Pau Monné of XenServer.
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CVE-2025-58148 (GCVE-0-2025-58148)
Vulnerability from nvd – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI?
Title
x86: Incorrect input sanitisation in Viridian hypercalls
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in
one of three formats. Xen has boundary checking bugs with all three
formats, which can cause out-of-bounds reads and writes while processing
the inputs.
* CVE-2025-58147. 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-2025-58148. Hypercalls using any input format can cause
send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild
vCPU pointer.
Severity ?
7.5 (High)
Assigner
References
Credits
This issue was discovered by Teddy Astie of Vates
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"references": [
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"url": "https://xenbits.xenproject.org/xsa/advisory-475.html"
}
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"title": "x86: Incorrect input sanitisation in Viridian hypercalls",
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CVE-2025-58147 (GCVE-0-2025-58147)
Vulnerability from nvd – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI?
Title
x86: Incorrect input sanitisation in Viridian hypercalls
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in
one of three formats. Xen has boundary checking bugs with all three
formats, which can cause out-of-bounds reads and writes while processing
the inputs.
* CVE-2025-58147. 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-2025-58148. Hypercalls using any input format can cause
send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild
vCPU pointer.
Severity ?
7.5 (High)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Credits
This issue was discovered by Teddy Astie of Vates
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CVE-2025-58145 (GCVE-0-2025-58145)
Vulnerability from nvd – Published: 2025-09-11 14:05 – Updated: 2025-11-04 21:13
VLAI?
Title
Arm issues with page refcounting
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are two issues related to the mapping of pages belonging to other
domains: For one, an assertion is wrong there, where the case actually
needs handling. A NULL pointer de-reference could result on a release
build. This is CVE-2025-58144.
And then 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. This is CVE-2025-58145.
Severity ?
7.5 (High)
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Credits
This issue was discovered by Jan Beulich of SUSE.
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CVE-2025-58144 (GCVE-0-2025-58144)
Vulnerability from nvd – Published: 2025-09-11 14:05 – Updated: 2025-11-04 21:13
VLAI?
Title
Arm issues with page refcounting
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are two issues related to the mapping of pages belonging to other
domains: For one, an assertion is wrong there, where the case actually
needs handling. A NULL pointer de-reference could result on a release
build. This is CVE-2025-58144.
And then 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. This is CVE-2025-58145.
Severity ?
7.5 (High)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Credits
This issue was discovered by Jan Beulich of SUSE.
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CVE-2025-58142 (GCVE-0-2025-58142)
Vulnerability from nvd – Published: 2025-09-11 14:05 – Updated: 2025-11-04 21:13
VLAI?
Title
Mutiple vulnerabilities in the Viridian interface
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are multiple issues related to the handling and accessing of guest
memory pages in the viridian code:
1. A NULL pointer dereference in the updating of the reference TSC area.
This is CVE-2025-27466.
2. A NULL pointer dereference by assuming the SIM page is mapped when
a synthetic timer message has to be delivered. This is
CVE-2025-58142.
3. 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. This is CVE-2025-58143.
Severity ?
9.8 (Critical)
CWE
- CWE-395 - Use of NullPointerException Catch to Detect NULL Pointer Dereference
Assigner
References
Credits
This issue was discovered by Roger Pau Monné of XenServer.
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CVE-2026-23553 (GCVE-0-2026-23553)
Vulnerability from cvelistv5 – Published: 2026-01-28 15:33 – Updated: 2026-01-28 16:41
VLAI?
Title
x86: incomplete IBPB for vCPU isolation
Summary
In the context switch logic Xen attempts to skip an IBPB in the case of
a vCPU returning to a CPU on which it was the previous vCPU to run.
While safe for Xen's isolation between vCPUs, this prevents the guest
kernel correctly isolating between tasks. Consider:
1) vCPU runs on CPU A, running task 1.
2) vCPU moves to CPU B, idle gets scheduled on A. Xen skips IBPB.
3) On CPU B, guest kernel switches from task 1 to 2, issuing IBPB.
4) vCPU moves back to CPU A. Xen skips IBPB again.
Now, task 2 is running on CPU A with task 1's training still in the BTB.
Severity ?
Assigner
References
Credits
This issue was discovered by David Kaplan of AMD.
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}
],
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"lang": "en",
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}
]
}
],
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CVE-2025-58150 (GCVE-0-2025-58150)
Vulnerability from cvelistv5 – Published: 2026-01-28 15:33 – Updated: 2026-01-28 16:46
VLAI?
Title
x86: buffer overrun with shadow paging + tracing
Summary
Shadow mode tracing code uses a set of per-CPU variables to avoid
cumbersome parameter passing. Some of these variables are written to
with guest controlled data, of guest controllable size. That size can
be larger than the variable, and bounding of the writes was missing.
Severity ?
8.8 (High)
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
Credits
This issue was discovered by Jan Beulich of SUSE.
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CVE-2025-58149 (GCVE-0-2025-58149)
Vulnerability from cvelistv5 – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI?
Title
Incorrect removal of permissions on PCI device unplug
Summary
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.
Severity ?
7.5 (High)
CWE
- CWE-672 - Operation on a Resource after Expiration or Release
Assigner
References
Credits
This issue was discovered by Jiqian Chen of AMD and diagnosed as a
security issue by Roger Pau Monné of XenServer.
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CVE-2025-58148 (GCVE-0-2025-58148)
Vulnerability from cvelistv5 – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI?
Title
x86: Incorrect input sanitisation in Viridian hypercalls
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in
one of three formats. Xen has boundary checking bugs with all three
formats, which can cause out-of-bounds reads and writes while processing
the inputs.
* CVE-2025-58147. 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-2025-58148. Hypercalls using any input format can cause
send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild
vCPU pointer.
Severity ?
7.5 (High)
Assigner
References
Credits
This issue was discovered by Teddy Astie of Vates
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CVE-2025-58147 (GCVE-0-2025-58147)
Vulnerability from cvelistv5 – Published: 2025-10-31 11:50 – Updated: 2025-11-04 21:13
VLAI?
Title
x86: Incorrect input sanitisation in Viridian hypercalls
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in
one of three formats. Xen has boundary checking bugs with all three
formats, which can cause out-of-bounds reads and writes while processing
the inputs.
* CVE-2025-58147. 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-2025-58148. Hypercalls using any input format can cause
send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild
vCPU pointer.
Severity ?
7.5 (High)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
Credits
This issue was discovered by Teddy Astie of Vates
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}
],
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"value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nSome Viridian hypercalls can specify a mask of vCPU IDs as an input, in\none of three formats. Xen has boundary checking bugs with all three\nformats, which can cause out-of-bounds reads and writes while processing\nthe inputs.\n\n * CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can\n cause vpmask_set() to write out of bounds when converting the bitmap\n to Xen\u0027s format.\n\n * CVE-2025-58148. Hypercalls using any input format can cause\n send_ipi() to read d-\u003evcpu[] out-of-bounds, and operate on a wild\n vCPU pointer."
}
],
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CVE-2025-58145 (GCVE-0-2025-58145)
Vulnerability from cvelistv5 – Published: 2025-09-11 14:05 – Updated: 2025-11-04 21:13
VLAI?
Title
Arm issues with page refcounting
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are two issues related to the mapping of pages belonging to other
domains: For one, an assertion is wrong there, where the case actually
needs handling. A NULL pointer de-reference could result on a release
build. This is CVE-2025-58144.
And then 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. This is CVE-2025-58145.
Severity ?
7.5 (High)
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Credits
This issue was discovered by Jan Beulich of SUSE.
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CVE-2025-58144 (GCVE-0-2025-58144)
Vulnerability from cvelistv5 – Published: 2025-09-11 14:05 – Updated: 2025-11-04 21:13
VLAI?
Title
Arm issues with page refcounting
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are two issues related to the mapping of pages belonging to other
domains: For one, an assertion is wrong there, where the case actually
needs handling. A NULL pointer de-reference could result on a release
build. This is CVE-2025-58144.
And then 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. This is CVE-2025-58145.
Severity ?
7.5 (High)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Credits
This issue was discovered by Jan Beulich of SUSE.
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CVE-2025-58142 (GCVE-0-2025-58142)
Vulnerability from cvelistv5 – Published: 2025-09-11 14:05 – Updated: 2025-11-04 21:13
VLAI?
Title
Mutiple vulnerabilities in the Viridian interface
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are multiple issues related to the handling and accessing of guest
memory pages in the viridian code:
1. A NULL pointer dereference in the updating of the reference TSC area.
This is CVE-2025-27466.
2. A NULL pointer dereference by assuming the SIM page is mapped when
a synthetic timer message has to be delivered. This is
CVE-2025-58142.
3. 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. This is CVE-2025-58143.
Severity ?
9.8 (Critical)
CWE
- CWE-395 - Use of NullPointerException Catch to Detect NULL Pointer Dereference
Assigner
References
Credits
This issue was discovered by Roger Pau Monné of XenServer.
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CVE-2025-58143 (GCVE-0-2025-58143)
Vulnerability from cvelistv5 – Published: 2025-09-11 14:05 – Updated: 2025-11-04 21:13
VLAI?
Title
Mutiple vulnerabilities in the Viridian interface
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are multiple issues related to the handling and accessing of guest
memory pages in the viridian code:
1. A NULL pointer dereference in the updating of the reference TSC area.
This is CVE-2025-27466.
2. A NULL pointer dereference by assuming the SIM page is mapped when
a synthetic timer message has to be delivered. This is
CVE-2025-58142.
3. 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. This is CVE-2025-58143.
Severity ?
9.8 (Critical)
CWE
- CWE-366 - Race Condition within a Thread
Assigner
References
Credits
This issue was discovered by Roger Pau Monné of XenServer.
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}
],
"datePublic": "2025-09-09T11:53:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nThere are multiple issues related to the handling and accessing of guest\nmemory pages in the viridian code:\n\n 1. A NULL pointer dereference in the updating of the reference TSC area.\n This is CVE-2025-27466.\n\n 2. A NULL pointer dereference by assuming the SIM page is mapped when\n a synthetic timer message has to be delivered. This is\n CVE-2025-58142.\n\n 3. A race in the mapping of the reference TSC page, where a guest can\n get Xen to free a page while still present in the guest physical to\n machine (p2m) page tables. This is CVE-2025-58143."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "Denial of Service (DoS) affecting the entire host, information leaks, or\nelevation of privilege."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-09-11T14:05:29.729Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-472.html"
}
],
"title": "Mutiple vulnerabilities in the Viridian interface",
"workarounds": [
{
"lang": "en",
"value": "Not enabling the reference_tsc and stimer viridian extensions will avoid\nthe issues."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2025-58143",
"datePublished": "2025-09-11T14:05:29.729Z",
"dateReserved": "2025-08-26T06:48:41.443Z",
"dateUpdated": "2025-11-04T21:13:24.914Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CERTFR-2026-AVI-0091
Vulnerability from certfr_avis - Published: 2026-01-27 - Updated: 2026-01-27
De multiples vulnérabilités ont été découvertes dans Xen. Certaines d'entre elles permettent à un attaquant de provoquer une élévation de privilèges, un déni de service à distance et une atteinte à la confidentialité des données.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| XEN | Xen | Xen versions xen-unstable sans les correctifs de sécurité xsa477.patch et xsa479.patch | ||
| XEN | Xen | Xen versions 4.18.x sans les correctifs de sécurité xsa477-4.18.patch et xsa479.patch | ||
| XEN | Xen | Xen versions 4.19.x sans le correctif de securité xsa477.patch | ||
| XEN | Xen | Xen version varstored master sans le correctif de sécurité xsa478.patch |
References
| Title | Publication Time | Tags | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen versions xen-unstable sans les correctifs de s\u00e9curit\u00e9 xsa477.patch et xsa479.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.18.x sans les correctifs de s\u00e9curit\u00e9 xsa477-4.18.patch et xsa479.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.19.x sans le correctif de securit\u00e9 xsa477.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen version varstored master sans le correctif de s\u00e9curit\u00e9 xsa478.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-23553",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-23553"
},
{
"name": "CVE-2025-58151",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-58151"
},
{
"name": "CVE-2025-58150",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-58150"
}
],
"initial_release_date": "2026-01-27T00:00:00",
"last_revision_date": "2026-01-27T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0091",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-01-27T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Xen. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges, un d\u00e9ni de service \u00e0 distance et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Xen",
"vendor_advisories": [
{
"published_at": "2026-01-27",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-477",
"url": "https://xenbits.xen.org/xsa/advisory-477.html"
},
{
"published_at": "2026-01-27",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-478",
"url": "https://xenbits.xen.org/xsa/advisory-478.html"
},
{
"published_at": "2026-01-27",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-479",
"url": "https://xenbits.xen.org/xsa/advisory-479.html"
}
]
}
CERTFR-2025-AVI-0927
Vulnerability from certfr_avis - Published: 2025-10-27 - Updated: 2025-10-27
Une vulnérabilité a été découverte dans Xen. Elle permet à un attaquant de provoquer une atteinte à la confidentialité des données et un contournement de la politique de sécurité.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen versions xen-unstable sans le correctif de s\u00e9curit\u00e9 xsa476.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.x ant\u00e9rieures \u00e0 4.17 avec le correctif de s\u00e9curit\u00e9 xsa476-4.17.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.18.x \u00e0 4.20.x sans le correctif de s\u00e9curit\u00e9 xsa476-4.20.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2025-58149",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-58149"
}
],
"initial_release_date": "2025-10-27T00:00:00",
"last_revision_date": "2025-10-27T00:00:00",
"links": [],
"reference": "CERTFR-2025-AVI-0927",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2025-10-27T00:00:00.000000"
}
],
"risks": [
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
}
],
"summary": "Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Xen. Elle permet \u00e0 un attaquant de provoquer une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es et un contournement de la politique de s\u00e9curit\u00e9.",
"title": "Vuln\u00e9rabilit\u00e9 dans Xen",
"vendor_advisories": [
{
"published_at": "2025-10-24",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-476",
"url": "https://xenbits.xen.org/xsa/advisory-476.html"
}
]
}
CERTFR-2025-AVI-0902
Vulnerability from certfr_avis - Published: 2025-10-22 - Updated: 2025-10-22
De multiples vulnérabilités ont été découvertes dans Xen. Certaines d'entre elles permettent à un attaquant de provoquer une élévation de privilèges, une atteinte à la confidentialité des données et un déni de service.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
References
| Title | Publication Time | Tags | |||
|---|---|---|---|---|---|
|
|||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen versions 4.20.x sans les correctifs xsa475-1.patch et xsa475-2.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
},
{
"description": "Xen versions 4.17.x, 4.18.x et 4.19.x sans les correctifs xsa475-4.19-1.patch et xsa475-4.19-2.patch",
"product": {
"name": "Xen",
"vendor": {
"name": "XEN",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2025-58147",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-58147"
},
{
"name": "CVE-2025-58148",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-58148"
}
],
"initial_release_date": "2025-10-22T00:00:00",
"last_revision_date": "2025-10-22T00:00:00",
"links": [],
"reference": "CERTFR-2025-AVI-0902",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2025-10-22T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Xen. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une \u00e9l\u00e9vation de privil\u00e8ges, une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es et un d\u00e9ni de service.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans Xen",
"vendor_advisories": [
{
"published_at": "2025-10-21",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-475",
"url": "https://xenbits.xen.org/xsa/advisory-475.html"
}
]
}
FKIE_CVE-2025-58149
Vulnerability from fkie_nvd - Published: 2025-10-31 12:15 - Updated: 2026-01-14 22:04
Severity ?
Summary
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.
References
| URL | Tags | ||
|---|---|---|---|
| security@xen.org | https://xenbits.xenproject.org/xsa/advisory-476.html | Patch, Vendor Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | http://www.openwall.com/lists/oss-security/2025/10/24/1 | Mailing List, Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | http://xenbits.xen.org/xsa/advisory-476.html | Patch, Vendor Advisory |
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"lastModified": "2026-01-14T22:04:31.723",
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"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
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"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"published": "2025-10-31T12:15:35.143",
"references": [
{
"source": "security@xen.org",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://xenbits.xenproject.org/xsa/advisory-476.html"
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"sourceIdentifier": "security@xen.org",
"vulnStatus": "Analyzed",
"weaknesses": [
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"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
FKIE_CVE-2025-58148
Vulnerability from fkie_nvd - Published: 2025-10-31 12:15 - Updated: 2026-01-14 22:03
Severity ?
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in
one of three formats. Xen has boundary checking bugs with all three
formats, which can cause out-of-bounds reads and writes while processing
the inputs.
* CVE-2025-58147. 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-2025-58148. Hypercalls using any input format can cause
send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild
vCPU pointer.
References
| URL | Tags | ||
|---|---|---|---|
| security@xen.org | https://xenbits.xenproject.org/xsa/advisory-475.html | Patch, Vendor Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | http://www.openwall.com/lists/oss-security/2025/10/21/1 | Mailing List, Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | http://xenbits.xen.org/xsa/advisory-475.html | Patch, Vendor Advisory |
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}
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"id": "CVE-2025-58148",
"lastModified": "2026-01-14T22:03:32.010",
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"type": "Secondary"
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"published": "2025-10-31T12:15:35.037",
"references": [
{
"source": "security@xen.org",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://xenbits.xenproject.org/xsa/advisory-475.html"
},
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"sourceIdentifier": "security@xen.org",
"vulnStatus": "Analyzed",
"weaknesses": [
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"description": [
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}
]
}
FKIE_CVE-2025-58147
Vulnerability from fkie_nvd - Published: 2025-10-31 12:15 - Updated: 2026-01-14 22:03
Severity ?
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
Some Viridian hypercalls can specify a mask of vCPU IDs as an input, in
one of three formats. Xen has boundary checking bugs with all three
formats, which can cause out-of-bounds reads and writes while processing
the inputs.
* CVE-2025-58147. 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-2025-58148. Hypercalls using any input format can cause
send_ipi() to read d->vcpu[] out-of-bounds, and operate on a wild
vCPU pointer.
References
| URL | Tags | ||
|---|---|---|---|
| security@xen.org | https://xenbits.xenproject.org/xsa/advisory-475.html | Patch, Vendor Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | http://www.openwall.com/lists/oss-security/2025/10/21/1 | Mailing List, Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | http://xenbits.xen.org/xsa/advisory-475.html | Patch, Vendor Advisory |
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"value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nSome Viridian hypercalls can specify a mask of vCPU IDs as an input, in\none of three formats. Xen has boundary checking bugs with all three\nformats, which can cause out-of-bounds reads and writes while processing\nthe inputs.\n\n * CVE-2025-58147. Hypercalls using the HV_VP_SET Sparse format can\n cause vpmask_set() to write out of bounds when converting the bitmap\n to Xen\u0027s format.\n\n * CVE-2025-58148. Hypercalls using any input format can cause\n send_ipi() to read d-\u003evcpu[] out-of-bounds, and operate on a wild\n vCPU pointer."
}
],
"id": "CVE-2025-58147",
"lastModified": "2026-01-14T22:03:18.957",
"metrics": {
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"integrityImpact": "NONE",
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"scope": "UNCHANGED",
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"published": "2025-10-31T12:15:34.590",
"references": [
{
"source": "security@xen.org",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://xenbits.xenproject.org/xsa/advisory-475.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"vulnStatus": "Analyzed",
"weaknesses": [
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"value": "CWE-125"
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}
]
}
FKIE_CVE-2025-58144
Vulnerability from fkie_nvd - Published: 2025-09-11 14:15 - Updated: 2025-11-04 22:16
Severity ?
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are two issues related to the mapping of pages belonging to other
domains: For one, an assertion is wrong there, where the case actually
needs handling. A NULL pointer de-reference could result on a release
build. This is CVE-2025-58144.
And then 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. This is CVE-2025-58145.
References
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}
],
"id": "CVE-2025-58144",
"lastModified": "2025-11-04T22:16:32.523",
"metrics": {
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"scope": "UNCHANGED",
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"published": "2025-09-11T14:15:42.593",
"references": [
{
"source": "security@xen.org",
"tags": [
"Vendor Advisory"
],
"url": "https://xenbits.xenproject.org/xsa/advisory-473.html"
},
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"source": "af854a3a-2127-422b-91ae-364da2661108",
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"sourceIdentifier": "security@xen.org",
"vulnStatus": "Modified",
"weaknesses": [
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"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
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}
FKIE_CVE-2025-58143
Vulnerability from fkie_nvd - Published: 2025-09-11 14:15 - Updated: 2025-11-04 22:16
Severity ?
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are multiple issues related to the handling and accessing of guest
memory pages in the viridian code:
1. A NULL pointer dereference in the updating of the reference TSC area.
This is CVE-2025-27466.
2. A NULL pointer dereference by assuming the SIM page is mapped when
a synthetic timer message has to be delivered. This is
CVE-2025-58142.
3. 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. This is CVE-2025-58143.
References
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}
],
"id": "CVE-2025-58143",
"lastModified": "2025-11-04T22:16:32.393",
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"published": "2025-09-11T14:15:42.470",
"references": [
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"source": "security@xen.org",
"tags": [
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"url": "https://xenbits.xenproject.org/xsa/advisory-472.html"
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"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
FKIE_CVE-2025-58142
Vulnerability from fkie_nvd - Published: 2025-09-11 14:15 - Updated: 2025-11-04 22:16
Severity ?
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are multiple issues related to the handling and accessing of guest
memory pages in the viridian code:
1. A NULL pointer dereference in the updating of the reference TSC area.
This is CVE-2025-27466.
2. A NULL pointer dereference by assuming the SIM page is mapped when
a synthetic timer message has to be delivered. This is
CVE-2025-58142.
3. 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. This is CVE-2025-58143.
References
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}
],
"id": "CVE-2025-58142",
"lastModified": "2025-11-04T22:16:32.257",
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"references": [
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"url": "http://xenbits.xen.org/xsa/advisory-472.html"
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"sourceIdentifier": "security@xen.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
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"lang": "en",
"value": "CWE-395"
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],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
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}
FKIE_CVE-2025-58145
Vulnerability from fkie_nvd - Published: 2025-09-11 14:15 - Updated: 2025-11-04 22:16
Severity ?
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are two issues related to the mapping of pages belonging to other
domains: For one, an assertion is wrong there, where the case actually
needs handling. A NULL pointer de-reference could result on a release
build. This is CVE-2025-58144.
And then 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. This is CVE-2025-58145.
References
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}
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"lastModified": "2025-11-04T22:16:32.653",
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"references": [
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"source": "security@xen.org",
"tags": [
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"url": "https://xenbits.xenproject.org/xsa/advisory-473.html"
},
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"source": "af854a3a-2127-422b-91ae-364da2661108",
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"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://xenbits.xen.org/xsa/advisory-473.html"
}
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"vulnStatus": "Modified",
"weaknesses": [
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"lang": "en",
"value": "CWE-362"
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],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
FKIE_CVE-2025-27466
Vulnerability from fkie_nvd - Published: 2025-09-11 14:15 - Updated: 2025-11-04 22:16
Severity ?
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
There are multiple issues related to the handling and accessing of guest
memory pages in the viridian code:
1. A NULL pointer dereference in the updating of the reference TSC area.
This is CVE-2025-27466.
2. A NULL pointer dereference by assuming the SIM page is mapped when
a synthetic timer message has to be delivered. This is
CVE-2025-58142.
3. 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. This is CVE-2025-58143.
References
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}
],
"id": "CVE-2025-27466",
"lastModified": "2025-11-04T22:16:08.697",
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"published": "2025-09-11T14:15:41.413",
"references": [
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"tags": [
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}