CVE-2022-33745

Advisory lineage Upstream: 0 Downstream: 16
Modified
Published: 26 Jul 2022, 00:00
Last modified:03 Aug 2024, 08:09

Vulnerability Summary

Overall Risk (default)
medium
35/100
CVSS Score
8.8 HIGH
v3.1 (nvd)
EPSS Score
0.08% LOW
0% probability +0.01%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

26 Jul 2022, 00:00
Published
Vulnerability first disclosed
03 Aug 2024, 08:09
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•HIGH•Score: 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.08%• Percentile: 23%

Affected Systems

  • debian•debian_linux

    11.0

  • fedoraproject•fedora

    35 | 36

References (7)