Vulnerability Monitor

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CVE-2022-42327

x86: unintended memory sharing between guests On Intel systems that support the "virtualize APIC accesses" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.

Published

2022-11-01T13:15:12.163

Last Modified

2025-05-05T20:15:18.900

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.1 (HIGH)

Weaknesses

Type: Primary
NVD-CWE-noinfo
Type: Secondary
CWE-284

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	xen	xen	4.16	Yes
Operating System	fedoraproject	fedora	36	Yes
Operating System	fedoraproject	fedora	37	Yes

References

http://www.openwall.com/lists/oss-security/2022/11/01/3 Mailing List, Patch, Third Party Advisory ([email protected])
http://xenbits.xen.org/xsa/advisory-412.html Patch, Vendor Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/ ([email protected])
https://security.gentoo.org/glsa/202402-07 ([email protected])
https://xenbits.xenproject.org/xsa/advisory-412.txt Vendor Advisory ([email protected])
http://www.openwall.com/lists/oss-security/2022/11/01/3 Mailing List, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://xenbits.xen.org/xsa/advisory-412.html Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/ (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/202402-07 (af854a3a-2127-422b-91ae-364da2661108)
https://xenbits.xenproject.org/xsa/advisory-412.txt Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)