Lucene search

K
ubuntucveUbuntu.comUB:CVE-2022-26363
HistoryJun 09, 2022 - 12:00 a.m.

CVE-2022-26363

2022-06-0900:00:00
ubuntu.com
ubuntu.com
23
x86 platform
non-coherent mappings
xen security

7.2 High

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

6.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

0.001 Low

EPSS

Percentile

27.5%

x86 pv: Insufficient care with non-coherent mappings T[his CNA information
record relates to multiple CVEs; the text explains which
aspects/vulnerabilities correspond to which CVE.] Xen maintains a type
reference count for pages, in addition to a regular reference count. This
scheme is used to maintain invariants required for Xen’s safety, e.g. PV
guests may not have direct writeable access to pagetables; updates need
auditing by Xen. Unfortunately, Xen’s safety logic doesn’t account for
CPU-induced cache non-coherency; cases where the CPU can cause the content
of the cache to be different to the content in main memory. In such cases,
Xen’s safety logic can incorrectly conclude that the contents of a page is
safe.

Notes

Author Note
mdeslaur hypervisor packages are in universe. For issues in the hypervisor, add appropriate tags to each section, ex: Tags_xen: universe-binary

7.2 High

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:L/Au:N/C:C/I:C/A:C

6.7 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

0.001 Low

EPSS

Percentile

27.5%