CVE-2021-28688

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxunspecified < 4.12unknown
LinuxLinux3.11 < unspecifiedaffected
LinuxLinuxnext of 4.3 < unspecifiedunaffected
LinuxLinux5.11.1affected
LinuxLinux5.12-rcaffected
LinuxLinux5.10.18affected
LinuxLinuxunspecified < 4.12unknown
LinuxLinux4.4 < unspecifiedunknown
LinuxLinuxnext of 5.9 < unspecifiedunaffected

Weaknesses

  • unknown

ADP Enrichment

CVE Program Container

Additional References

References