GSD-2021-28688
Vulnerability from gsd - Updated: 2023-12-13 01:23Details
The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11.
Aliases
Aliases
{
"GSD": {
"alias": "CVE-2021-28688",
"description": "The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn\u0027t use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11.",
"id": "GSD-2021-28688",
"references": [
"https://www.suse.com/security/cve/CVE-2021-28688.html",
"https://ubuntu.com/security/CVE-2021-28688",
"https://advisories.mageia.org/CVE-2021-28688.html",
"https://security.archlinux.org/CVE-2021-28688",
"https://alas.aws.amazon.com/cve/html/CVE-2021-28688.html",
"https://linux.oracle.com/cve/CVE-2021-28688.html"
]
},
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"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
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"details": "The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn\u0027t use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. XSA-365 was classified to affect versions back to at least 3.11.",
"id": "GSD-2021-28688",
"modified": "2023-12-13T01:23:28.853821Z",
"schema_version": "1.4.0"
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"value": "Reconfiguring guests to use alternative (e.g. qemu-based) backends may\navoid the vulnerability.\n\nAvoiding the use of persistent grants will also avoid the vulnerability.\nThis can be achieved by passing the \"feature_persistent=0\" module option\nto the xen-blkback driver."
}
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"lastModifiedDate": "2022-05-27T16:46Z",
"publishedDate": "2021-04-06T19:15Z"
}
}
}
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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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