High severity · published Nov 1, 2022
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…
7.1
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FE
Fedora · Fedoraproject
36; 37 · source: NVD
XE
Xen · Xen
4.16 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-42327
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-42327
Mailing List
http://www.openwall.com/lists/oss-security/2022/11/01/3
Patch
http://xenbits.xen.org/xsa/advisory-412.html
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZLI2NPNEH7CNJO3VZGQNOI4M4EWLNKPZ/
security.gentoo.org
https://security.gentoo.org/glsa/202402-07
Vendor Advisory
https://xenbits.xenproject.org/xsa/advisory-412.txt
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