Ubuntu.comUB:CVE-2022-33745CVE-2022-33745
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
4.3 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:S/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
13.2%
insufficient TLB flush for x86 PV guests in shadow mode For migration as
well as to work around kernels unaware of L1TF (see XSA-273), PV guests may
be run in shadow paging mode. To address XSA-401, code was moved inside a
function in Xen. This code movement missed a variable changing meaning /
value between old and new code positions. The now wrong use of the variable
did lead to a wrong TLB flush condition, omitting flushes where such are
necessary.
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 |
References
www.openwall.com/lists/oss-security/2022/07/26/2
www.openwall.com/lists/oss-security/2022/07/26/3
xenbits.xen.org/xsa/advisory-408.html
launchpad.net/bugs/cve/CVE-2022-33745
nvd.nist.gov/vuln/detail/CVE-2022-33745
security-tracker.debian.org/tracker/CVE-2022-33745
www.cve.org/CVERecord?id=CVE-2022-33745
xenbits.xen.org/xsa/advisory-408.html
xenbits.xenproject.org/xsa/advisory-408.txt
Related
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
4.3 Medium
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:L/AC:L/Au:S/C:P/I:P/A:P
0.0004 Low
EPSS
Percentile
13.2%