CVE-2021-28688
Vulnerability from cvelistv5
Published
2021-04-06 18:07
Modified
2024-08-03 21:47
Severity ?
EPSS score ?
Summary
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.
References
| ▼ | URL | Tags | |
|---|---|---|---|
| security@xen.org | https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html | Third Party Advisory | |
| security@xen.org | https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html | Third Party Advisory | |
| security@xen.org | https://xenbits.xenproject.org/xsa/advisory-371.txt | Patch, Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html | Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html | Third Party Advisory | |
| af854a3a-2127-422b-91ae-364da2661108 | https://xenbits.xenproject.org/xsa/advisory-371.txt | Patch, Third Party Advisory |
Impacted products
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.