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CERTFR-2026-AVI-0721
Vulnerability from certfr_avis - Published: 2026-06-10 - Updated: 2026-06-10
De multiples vulnérabilités ont été découvertes dans Xen. 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
References
| Title | Publication Time | Tags | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Xen toutes versions sans le dernier correctif de s\u00e9curit\u00e9",
"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-2026-42489",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42489"
},
{
"name": "CVE-2026-42487",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42487"
},
{
"name": "CVE-2025-10263",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-10263"
},
{
"name": "CVE-2026-42488",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42488"
},
{
"name": "CVE-2026-42490",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-42490"
}
],
"initial_release_date": "2026-06-10T00:00:00",
"last_revision_date": "2026-06-10T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0721",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-06-10T00:00:00.000000"
}
],
"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. 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": "2026-06-09",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-491",
"url": "https://xenbits.xen.org/xsa/advisory-491.html"
},
{
"published_at": "2026-06-09",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-493",
"url": "https://xenbits.xen.org/xsa/advisory-493.html"
},
{
"published_at": "2026-06-09",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-494",
"url": "https://xenbits.xen.org/xsa/advisory-494.html"
},
{
"published_at": "2026-06-09",
"title": "Bulletin de s\u00e9curit\u00e9 Xen xsa/advisory-492",
"url": "https://xenbits.xen.org/xsa/advisory-492.html"
}
]
}
CVE-2025-10263 (GCVE-0-2025-10263)
Vulnerability from cvelistv5 – Published: 2026-06-09 09:23 – Updated: 2026-06-30 12:07
VLAI
EPSS
Summary
Arm C1-Ultra, C1-Premium, Neoverse V3 & V3AE, Neoverse V2, Neoverse V1, Neoverse-N2, Neoverse-N1, Cortex-X925, Cortex-X4, Cortex-X3, Cortex-X2, Cortex-X1 & X1C, Cortex-A710, Cortex-A78, A78AE & A78C, Cortex-A77, Cortex-A76 & A76A may allow writes to resources owned by a higher exception level.
Severity
9.1 (Critical)
8.4 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://developer.arm.com/documentation/112137 | |
| http://xenbits.xen.org/xsa/advisory-493.html | |
| http://www.openwall.com/lists/oss-security/2026/0… | |
| https://access.redhat.com/security/cve/CVE-2025-10263 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2486958 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
Impacted products
27 products
| Vendor | Product | Version | |
|---|---|---|---|
| Arm | C1-Ultra |
Affected:
0
|
|
| Arm | C1-Premium |
Affected:
0
|
|
| Arm | Neoverse V3 |
Affected:
0
|
|
| Arm | Neoverse V3AE |
Affected:
0
|
|
| Arm | Neoverse V1 |
Affected:
0
|
|
| Arm | Neoverse N2 |
Affected:
0
|
|
| Arm | Neoverse N1 |
Affected:
0
|
|
| Arm | Cortex-X925 |
Affected:
0
|
|
| Arm | Cortex-X4 |
Affected:
0
|
|
| Arm | Cortex-X3 |
Affected:
0
|
|
| Arm | Cortex-X2 |
Affected:
0
|
|
| Arm | Cortex-X1 |
Affected:
0
|
|
| Arm | Cortex-X1C |
Affected:
0
|
|
| Arm | Cortex-A710 |
Affected:
0
|
|
| Arm | Cortex-A78 |
Affected:
0
|
|
| Arm | Cortex-A78AE |
Affected:
0
|
|
| Arm | Cortex-A78C |
Affected:
0
|
|
| Arm | Cortex-A77 |
Affected:
0
|
|
| Arm | Cortex-A76 |
Affected:
0
|
|
| Arm | Cortex-A76AE |
Affected:
0
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10 |
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux for NVIDIA 26 |
cpe:/a:redhat:enterprise_linux_nvidia: |
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7 |
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"versions": [
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CVE-2026-42487 (GCVE-0-2026-42487)
Vulnerability from cvelistv5 – Published: 2026-06-18 13:46 – Updated: 2026-06-18 15:07
VLAI
EPSS
Title
x86 HVM I/O port list traversal
Summary
HVM guest I/O port accesses are subject to either emulation or at least
translation. Translations are managed by the device model (via
XEN_DOMCTL_ioport_mapping), and hence the linked list used may changed
at any time. Traversal of those lists (while handling guest I/O port
accesses) therefore needs synchronizing with updates, which was missing
so far.
Severity
7.9 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Date Public
2026-06-09 12:00
Credits
This issue was discovered by Jan Beulich of SUSE.
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"value": "HVM guest I/O port accesses are subject to either emulation or at least\ntranslation. Translations are managed by the device model (via\nXEN_DOMCTL_ioport_mapping), and hence the linked list used may changed\nat any time. Traversal of those lists (while handling guest I/O port\naccesses) therefore needs synchronizing with updates, which was missing\nso far."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "A device model of a HVM guest can cause a hypervisor crash, causing a\nDenial of Service (DoS) of the entire host. Privilege escalation and\ninformation leaks cannot be ruled out."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-18T13:46:53.459Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
"references": [
{
"url": "https://xenbits.xenproject.org/xsa/advisory-491.html"
}
],
"title": "x86 HVM I/O port list traversal",
"workarounds": [
{
"lang": "en",
"value": "Running only PV or PVH guests will avoid the vulnerability.\n\n(Switching from a device model stub domain or a de-privileged device\nmodel to a fully privileged Dom0 device model does NOT mitigate this\nvulnerability. Rather, it simply recategorises the vulnerability to\nhostile management code, regarding it \"as designed\"; thus it merely\nreclassifies these issues as \"not a bug\". The security of a Xen system\nusing stub domains is still better than with a qemu-dm running as a Dom0\nprocess. Users and vendors of stub qemu dm systems should not change\ntheir configuration to use a Dom0 qemu process.)"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"assignerShortName": "XEN",
"cveId": "CVE-2026-42487",
"datePublished": "2026-06-18T13:46:53.459Z",
"dateReserved": "2026-04-27T14:20:24.138Z",
"dateUpdated": "2026-06-18T15:07:31.335Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-42488 (GCVE-0-2026-42488)
Vulnerability from cvelistv5 – Published: 2026-06-18 13:47 – Updated: 2026-06-18 15:07
VLAI
EPSS
Title
x86: mismatched mapcache metadata
Summary
Some shadow paging errors paths will switch the page-tables without
updating the currently running vCPU reference. This causes a mismatch
between the loaded page-tables and the mapcache metadata which can lead
to corruption of the mapcache.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Date Public
2026-06-09 12:00
Credits
This issue was discovered by Roger Pau Monné of XenServer.
{
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"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"version": "3.1"
}
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"id": "CVE-2026-42488",
"options": [
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"Exploitation": "none"
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{
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}
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"timestamp": "2026-06-18T15:02:17.385668Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
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"cweId": "CWE-119",
"description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer",
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}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-18T15:03:20.373Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2026-06-18T15:07:35.190Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "http://xenbits.xen.org/xsa/advisory-494.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2026/06/09/14"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
{
"status": "unknown",
"version": "consult Xen advisory XSA-494"
}
]
}
],
"configurations": [
{
"lang": "en",
"value": "Xen 4.15 and onwards are vulnerable. Any Xen version with the fix for\nXSA-438 applied is vulnerable.\n\nOnly x86 systems are vulnerable. Only 64-bit PV guests can leverage the\nvulnerability, and only when running in shadow mode. Shadow mode would\nbe in use when migrating guests or as a workaround for XSA-273 (L1TF)."
}
],
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"type": "finder",
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"lang": "en",
"value": "Some shadow paging errors paths will switch the page-tables without\nupdating the currently running vCPU reference. This causes a mismatch\nbetween the loaded page-tables and the mapcache metadata which can lead\nto corruption of the mapcache."
}
],
"impacts": [
{
"descriptions": [
{
"lang": "en",
"value": "Privilege escalation, Denial of Service (DoS) affecting the entire host,\nand information leaks."
}
]
}
],
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"dateUpdated": "2026-06-18T13:47:23.838Z",
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}
],
"title": "x86: mismatched mapcache metadata",
"workarounds": [
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}
]
}
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"datePublished": "2026-06-18T13:47:23.838Z",
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"dateUpdated": "2026-06-18T15:07:35.190Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-42489 (GCVE-0-2026-42489)
Vulnerability from cvelistv5 – Published: 2026-06-18 13:47 – Updated: 2026-06-18 15:04
VLAI
EPSS
Title
domctl lock open to abuse
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
To create and manage guests, domctl operations are used by the control
domain, a possible Xenstore domain, or by a domain controlling a
particular guest. Some of these operations may not be executed in
parallel, so a system-wide lock is used. The way that lock is acquired
is, however, not providing any fairness. This is CVE-2026-42489.
Furthermore, with XSM/Flask in use, the lock acquire will, for some
operations, occur ahead of any permission checking. This is
CVE-2026-42490.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-667 - Improper Locking
Assigner
References
1 reference
Date Public
2026-06-09 12:00
Credits
This issue was discovered by Andrew Cooper of Citrix.
{
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"metrics": [
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"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "HIGH",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-42489",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
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"timestamp": "2026-06-18T15:04:27.888372Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
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"cweId": "CWE-667",
"description": "CWE-667 Improper Locking",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-06-18T15:04:32.591Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
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"defaultStatus": "unknown",
"product": "Xen",
"vendor": "Xen",
"versions": [
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}
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}
],
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}
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"lang": "en",
"type": "finder",
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}
],
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"descriptions": [
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"lang": "en",
"value": "[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nTo create and manage guests, domctl operations are used by the control\ndomain, a possible Xenstore domain, or by a domain controlling a\nparticular guest. Some of these operations may not be executed in\nparallel, so a system-wide lock is used. The way that lock is acquired\nis, however, not providing any fairness. This is CVE-2026-42489.\n\nFurthermore, with XSM/Flask in use, the lock acquire will, for some\noperations, occur ahead of any permission checking. This is\nCVE-2026-42490."
}
],
"impacts": [
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"descriptions": [
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"lang": "en",
"value": "A less privileged entity may stall an equally or more privileged entity,\npotentially leading to a Denial od Service (DoS) of up to the entire\nhost."
}
]
}
],
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"dateUpdated": "2026-06-18T13:47:13.198Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
"shortName": "XEN"
},
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"url": "https://xenbits.xenproject.org/xsa/advisory-492.html"
}
],
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"datePublished": "2026-06-18T13:47:13.198Z",
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CVE-2026-42490 (GCVE-0-2026-42490)
Vulnerability from cvelistv5 – Published: 2026-06-18 13:47 – Updated: 2026-06-18 15:04
VLAI
EPSS
Title
domctl lock open to abuse
Summary
[This CNA information record relates to multiple CVEs; the
text explains which aspects/vulnerabilities correspond to which CVE.]
To create and manage guests, domctl operations are used by the control
domain, a possible Xenstore domain, or by a domain controlling a
particular guest. Some of these operations may not be executed in
parallel, so a system-wide lock is used. The way that lock is acquired
is, however, not providing any fairness. This is CVE-2026-42489.
Furthermore, with XSM/Flask in use, the lock acquire will, for some
operations, occur ahead of any permission checking. This is
CVE-2026-42490.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-667 - Improper Locking
Assigner
References
1 reference
Date Public
2026-06-09 12:00
Credits
This issue was discovered by Andrew Cooper of Citrix.
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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}
},
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{
"Technical Impact": "partial"
}
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"timestamp": "2026-06-18T15:04:47.308725Z",
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"type": "ssvc"
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"title": "CISA ADP Vulnrichment"
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}
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"value": "A less privileged entity may stall an equally or more privileged entity,\npotentially leading to a Denial od Service (DoS) of up to the entire\nhost."
}
]
}
],
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"dateUpdated": "2026-06-18T13:47:13.257Z",
"orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
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"title": "domctl lock open to abuse",
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},
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}
Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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