Linux Linux

CVE-2021-28688
MEDIUM 6.5

At a glance

Source
NVD
EPSS
EPSS 0.34 % · percentile 27 ()
State
PUBLISHED
Published
Updated
Assigner
XEN
NVD status
Modified

Description

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.

Weaknesses (CWE)

  • CWE-665 — Improper Initialization

References

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 6.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)
CVSS 2.0LOW 2.1AV:L/AC:L/Au:N/C:N/I:N/A:PNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxunknown unspecified < 4.12 ; affected 3.11 < unspecified ; unaffected next of 4.3 < unspecified
Linux · Linuxaffected 5.11.1
Linux · Linuxaffected 5.12-rc
Linux · Linuxaffected 5.10.18
Linux · Linuxunknown unspecified < 4.12 ; unknown 4.4 < unspecified ; unaffected next of 5.9 < unspecified

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD