ubuntu-cve-2025-27465
Vulnerability from osv_ubuntu
Published
2025-07-16 09:15
Modified
2026-05-20 15:17
Summary
Details
Certain instructions need intercepting and emulating by Xen. In some cases Xen emulates the instruction by replaying it, using an executable stub. Some instructions may raise an exception, which is supposed to be handled gracefully. Certain replayed instructions have additional logic to set up and recover the changes to the arithmetic flags. For replayed instructions where the flags recovery logic is used, the metadata for exception handling was incorrect, preventing Xen from handling the the exception gracefully, treating it as fatal instead.
Severity
4.3 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
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{
"binary_name": "xen-utils-common",
"binary_version": "4.20.2+7-g1badcf5035-2build2"
},
{
"binary_name": "xenstore-utils",
"binary_version": "4.20.2+7-g1badcf5035-2build2"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "xen",
"purl": "pkg:deb/ubuntu/xen@4.20.2+7-g1badcf5035-2build2?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.20.0+68-g35cb38b222-1",
"4.20.2+7-g1badcf5035-2",
"4.20.2+7-g1badcf5035-2build2"
]
}
],
"aliases": [],
"details": "Certain instructions need intercepting and emulating by Xen. In some cases Xen emulates the instruction by replaying it, using an executable stub. Some instructions may raise an exception, which is supposed to be handled gracefully. Certain replayed instructions have additional logic to set up and recover the changes to the arithmetic flags. For replayed instructions where the flags recovery logic is used, the metadata for exception handling was incorrect, preventing Xen from handling the the exception gracefully, treating it as fatal instead.",
"id": "UBUNTU-CVE-2025-27465",
"modified": "2026-05-20T15:17:31Z",
"published": "2025-07-16T09:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-27465"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-27465"
},
{
"type": "REPORT",
"url": "https://xenbits.xen.org/xsa/advisory-470.html"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2025-27465"
]
}
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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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