CVE-2022-42327

published 2022-11-01

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…

Priority P4 29 high 7.1 CVSS 3.1

AV L AC L PR L UI N S U C H I H A N

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.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
debian	xen	< xen 4.16.2+90-g0d39a6d1ae-1 (bookworm)	xen 4.16.2+90-g0d39a6d1ae-1 (bookworm)
fedoraproject	fedora	—	—
fedoraproject	fedora	—	—
xen	xen	—	—
xen	xen	>= 0 < 4.16.2+90-g0d39a6d1ae-1	4.16.2+90-g0d39a6d1ae-1
xen	xen	>= 0 < 4.16.2+90-g0d39a6d1ae-1	4.16.2+90-g0d39a6d1ae-1
xen	xen	>= 0 < 4.16.2+90-g0d39a6d1ae-1	4.16.2+90-g0d39a6d1ae-1

CVSS provenance

nvd v3.1 7.1 HIGH CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

osv 7.1 HIGH

vendor_debian 7.1 HIGH

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CWE-284