USN-7866-1 (UBUNTU-CVE-2025-20053)
Vulnerability from osv_ubuntu – Published: 2025-11-10 20:11 – Updated: 2026-06-25 10:46 – Source website
VLAI
Summary
intel-microcode vulnerabilities
Details
Barak Gross discovered that some Intel® Xeon® processors with SGX enabled did not properly handle buffer restrictions. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-20053)
Avinash Maddy discovered that some Intel® processors did not properly isolate or compartmentalize the stream cache mechanisms. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-20109)
Joseph Nuzman discovered that some Intel® Xeon® processors did not properly manage references to active allocate resources. A local authenticated user could potentially use this issue to cause a denial of service (system crash). (CVE-2025-21090)
It was discovered that some Intel® Xeon® 6 processors did not properly provide sufficient granularity of access control in the out of band management service module (OOB-MSM). An authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-22839)
It was discovered that some Intel® Xeon® 6 Scalable processors did not properly handle a specific sequence of processor instructions, leading to unexpected behavior. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-22840)
Joseph Nuzman discovered that some Intel® Xeon® 6 processors with Intel® Trust Domain Extensions (Intel® TDX) did not properly handle overlap between protected memory ranges. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-22889)
Avraham Shalev discovered that some Intel® Xeon® processors did not properly provide sufficient control flow management in the Alias Checking Trusted Module (ACTM) firmware. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-24305)
Aviv Eisen and Avraham Shalev discovered that some Intel® Xeon® 6 processors when using Intel® SGX or Intel® TDX did not properly protect against out-of-bounds writes in the memory subsystem. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-26403)
Aviv Eisen and Avraham Shalev discovered that some Intel® Xeon® 6 processors when using Intel® SGX or Intel® TDX did not properly implement security checks in the DDRIO configuration. A local authenticated user could potentially use this issue to escalate their privileges. (CVE-2025-32086)
References
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"id": "CVE-2025-32086",
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"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
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"score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N",
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"type": "CVSS_V3"
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{
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{
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{
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{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N",
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"score": "medium",
"type": "Ubuntu"
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"type": "CVSS_V3"
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"type": "CVSS_V4"
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{
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"type": "Ubuntu"
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{
"id": "CVE-2025-26403",
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{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
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"score": "medium",
"type": "Ubuntu"
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{
"id": "CVE-2025-32086",
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{
"score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N",
"type": "CVSS_V3"
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"score": "CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N",
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"type": "Ubuntu"
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}
],
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}
},
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}
]
},
"package": {
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"name": "intel-microcode",
"purl": "pkg:deb/ubuntu/intel-microcode@3.20250812.0ubuntu0.25.10.1?arch=source\u0026distro=questing"
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"3.20250512.1ubuntu1"
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],
"aliases": [],
"details": "Barak Gross discovered that some Intel\u00ae Xeon\u00ae processors with SGX enabled\ndid not properly handle buffer restrictions. A local authenticated user\ncould potentially use this issue to escalate their privileges.\n(CVE-2025-20053)\n\nAvinash Maddy discovered that some Intel\u00ae processors did not properly\nisolate or compartmentalize the stream cache mechanisms. A local\nauthenticated user could potentially use this issue to escalate their\nprivileges. (CVE-2025-20109)\n\nJoseph Nuzman discovered that some Intel\u00ae Xeon\u00ae processors did not properly\nmanage references to active allocate resources. A local authenticated user\ncould potentially use this issue to cause a denial of service (system\ncrash). (CVE-2025-21090)\n\nIt was discovered that some Intel\u00ae Xeon\u00ae 6 processors did not properly\nprovide sufficient granularity of access control in the out of band\nmanagement service module (OOB-MSM). An authenticated user could\npotentially use this issue to escalate their privileges. (CVE-2025-22839)\n\nIt was discovered that some Intel\u00ae Xeon\u00ae 6 Scalable processors did not\nproperly handle a specific sequence of processor instructions, leading to\nunexpected behavior. A local authenticated user could potentially use this\nissue to escalate their privileges. (CVE-2025-22840)\n\nJoseph Nuzman discovered that some Intel\u00ae Xeon\u00ae 6 processors with Intel\u00ae\nTrust Domain Extensions (Intel\u00ae TDX) did not properly handle overlap\nbetween protected memory ranges. A local authenticated user could\npotentially use this issue to escalate their privileges. (CVE-2025-22889)\n\nAvraham Shalev discovered that some Intel\u00ae Xeon\u00ae processors did not\nproperly provide sufficient control flow management in the Alias Checking\nTrusted Module (ACTM) firmware. A local authenticated user could\npotentially use this issue to escalate their privileges. (CVE-2025-24305)\n\nAviv Eisen and Avraham Shalev discovered that some Intel\u00ae Xeon\u00ae 6\nprocessors when using Intel\u00ae SGX or Intel\u00ae TDX did not properly protect\nagainst out-of-bounds writes in the memory subsystem. A local authenticated\nuser could potentially use this issue to escalate their privileges.\n(CVE-2025-26403)\n\nAviv Eisen and Avraham Shalev discovered that some Intel\u00ae Xeon\u00ae 6\nprocessors when using Intel\u00ae SGX or Intel\u00ae TDX did not properly implement\nsecurity checks in the DDRIO configuration. A local authenticated user\ncould potentially use this issue to escalate their privileges.\n(CVE-2025-32086)",
"id": "USN-7866-1",
"modified": "2026-06-25T10:46:59Z",
"published": "2025-11-10T20:11:08Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-7866-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-20053"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-20109"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-21090"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-22839"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-22840"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-22889"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-24305"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-26403"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-32086"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "intel-microcode vulnerabilities",
"upstream": [
"UBUNTU-CVE-2025-20053",
"UBUNTU-CVE-2025-20109",
"UBUNTU-CVE-2025-21090",
"UBUNTU-CVE-2025-22839",
"UBUNTU-CVE-2025-22840",
"UBUNTU-CVE-2025-22889",
"UBUNTU-CVE-2025-24305",
"UBUNTU-CVE-2025-26403",
"UBUNTU-CVE-2025-32086"
]
}
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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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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