GSD-2022-33744
Vulnerability from gsd - Updated: 2023-12-13 01:19Details
Arm guests can cause Dom0 DoS via PV devices When mapping pages of guests on Arm, dom0 is using an rbtree to keep track of the foreign mappings. Updating of that rbtree is not always done completely with the related lock held, resulting in a small race window, which can be used by unprivileged guests via PV devices to cause inconsistencies of the rbtree. These inconsistencies can lead to Denial of Service (DoS) of dom0, e.g. by causing crashes or the inability to perform further mappings of other guests' memory pages.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2022-33744",
"description": "Arm guests can cause Dom0 DoS via PV devices When mapping pages of guests on Arm, dom0 is using an rbtree to keep track of the foreign mappings. Updating of that rbtree is not always done completely with the related lock held, resulting in a small race window, which can be used by unprivileged guests via PV devices to cause inconsistencies of the rbtree. These inconsistencies can lead to Denial of Service (DoS) of dom0, e.g. by causing crashes or the inability to perform further mappings of other guests\u0027 memory pages.",
"id": "GSD-2022-33744",
"references": [
"https://www.suse.com/security/cve/CVE-2022-33744.html",
"https://www.debian.org/security/2022/dsa-5191",
"https://advisories.mageia.org/CVE-2022-33744.html",
"https://alas.aws.amazon.com/cve/html/CVE-2022-33744.html",
"https://ubuntu.com/security/CVE-2022-33744"
]
},
"gsd": {
"metadata": {
"exploitCode": "unknown",
"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
},
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"details": "Arm guests can cause Dom0 DoS via PV devices When mapping pages of guests on Arm, dom0 is using an rbtree to keep track of the foreign mappings. Updating of that rbtree is not always done completely with the related lock held, resulting in a small race window, which can be used by unprivileged guests via PV devices to cause inconsistencies of the rbtree. These inconsistencies can lead to Denial of Service (DoS) of dom0, e.g. by causing crashes or the inability to perform further mappings of other guests\u0027 memory pages.",
"id": "GSD-2022-33744",
"modified": "2023-12-13T01:19:23.524992Z",
"schema_version": "1.4.0"
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"value": "Only Arm systems (32-bit and 64-bit) are vulnerable. Dom0 Linux versions\n3.13 - 5.18 are vulnerable.\n\nX86 systems are not vulnerable."
}
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}
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"value": "A guest performing multiple I/Os of PV devices in parallel can cause\nDoS of dom0 and thus of the complete host."
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"url": "http://www.openwall.com/lists/oss-security/2022/07/05/4"
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"name": "[debian-lts-announce] 20221002 [SECURITY] [DLA 3131-1] linux security update",
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"value": "Arm guests can cause Dom0 DoS via PV devices When mapping pages of guests on Arm, dom0 is using an rbtree to keep track of the foreign mappings. Updating of that rbtree is not always done completely with the related lock held, resulting in a small race window, which can be used by unprivileged guests via PV devices to cause inconsistencies of the rbtree. These inconsistencies can lead to Denial of Service (DoS) of dom0, e.g. by causing crashes or the inability to perform further mappings of other guests\u0027 memory pages."
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"impact": {
"baseMetricV2": {
"acInsufInfo": false,
"cvssV2": {
"accessComplexity": "MEDIUM",
"accessVector": "LOCAL",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 1.9,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:L/AC:M/Au:N/C:N/I:N/A:P",
"version": "2.0"
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"exploitabilityScore": 3.4,
"impactScore": 2.9,
"obtainAllPrivilege": false,
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"severity": "LOW",
"userInteractionRequired": false
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"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"exploitabilityScore": 1.0,
"impactScore": 3.6
}
},
"lastModifiedDate": "2022-10-29T02:50Z",
"publishedDate": "2022-07-05T13:15Z"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
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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